AVIF File Converter
What is AVIF File Converter
AVIF File Converter is for those times you get an .avif image that won’t open where you need it, or won’t upload to a form that expects a more common format. You might have the file ready, but the website, editor, or message app rejects it.
The free AVIF File Converter by FlexiTools.io is a practical fix for that situation. In under 60 seconds, you can choose an AVIF file, preview the image on screen, pick an output format (JPEG, PNG, or WebP), adjust the quality slider, and use Convert & Download to get a new file. Need a quick copy that works in more places?
How to Use Our AVIF File Converter
Click Choose AVIF File and select a file that ends in .avif. After you pick a file, a status line on the page updates, and a preview section becomes visible with the image and the file name.
In Output Format, open the dropdown and choose JPEG, PNG, or WebP. The selection stays visible in the dropdown, so you can confirm the target format before you convert.
Adjust Quality using the slider. As you move it, the percent value next to the slider changes (for example, 80%), so you can keep track of the setting you used.
Click Convert & Download. When the conversion finishes, a Conversion Complete section appears showing Original Size, Converted Size, and Format, and the converted file downloads. Use Reset if you want to start over with a different file or new settings.
Why FlexiTools.io Offers the Best AVIF File Converter
Clear inputs that match what you’re trying to do
The first action is a single button labeled Choose AVIF File, and it only accepts AVIF files. That prevents the common mistake of selecting the wrong file type and wondering why nothing happens.
Preview and file name help you confirm you picked the right image
Once a file is selected, you see an on-screen image preview plus the file name. This matters when you have several similar exports sitting in a downloads folder. You can spot “wrong file” problems before you convert.
Format and quality are visible, not hidden
The tool keeps the main choices in one place: an Output Format dropdown and a Quality slider with a percent readout. You can change one thing and rerun the conversion, without digging through extra panels.
Results show the facts you need for sharing and uploading
After conversion, the page shows Original Size, Converted Size, and the chosen Format. That size readout is useful when your real goal is “get under an upload limit” or “make an email attachment smaller.”
This tool: Pick an AVIF, preview it, choose JPEG/PNG/WebP, set quality by percent, then download and see original vs converted size.
Typical alternatives: No preview, no size comparison, or unclear quality settings that make repeats frustrating.
Common frustration avoided here: Converting the wrong file, then noticing only after you downloaded it. The on-screen preview and file name reduce that risk.
A Deeper Look at AVIF Conversion Choices
AVIF is an image format you will often see on the web because it can deliver high visual quality at smaller file sizes. The catch is compatibility. Some apps, upload forms, and older tools still expect JPEG or PNG, and sometimes WebP. That’s where conversion helps: you keep the picture, but change the container so the file works in the place you need it.
Choosing the right output format
The tool gives you three targets in the Output Format dropdown: JPEG, PNG, and WebP. Each one fits a different goal.
JPEG for photos and smaller files
JPEG is a common choice for photos. It often produces smaller files than PNG for photo-style images, which helps with uploads and sharing. In the tool, a higher Quality percent usually keeps more detail, but the file may grow.
PNG for sharp edges and transparency needs
PNG is often used for graphics with hard edges, text, or simple shapes. People also reach for PNG when they need transparency. The tool’s dropdown does not ask you about transparency, so the safe approach is: if transparency matters in your workflow, try PNG first and confirm the result behaves the way you expect where you plan to use it.
WebP for modern web use
WebP is common on websites and in many modern apps. It can be a good middle path when you want smaller files but still want a widely accepted format. If your end goal is a web page or a product listing, WebP is often a useful output to test.
What the Quality slider really controls
The Quality slider runs in 10% steps, and the tool shows the current value as a percent next to the control. That percent gives you a repeatable setting. If 80% looks right for one image, you can use the same value on the next file and expect a similar balance.
Quality is a trade-off between detail and file size. Higher quality tends to keep fine texture, smooth gradients, and subtle shadows. Lower quality tends to reduce size, but you may start to see blockiness or banding in areas like skies and walls. The tool helps you judge this by giving you a size comparison after conversion, not just the download.
How to use the size results on screen
When the conversion finishes, the Conversion Complete section shows Original Size and Converted Size. That makes it easier to answer practical questions:
Did I actually reduce the file? If the converted size is larger than the original, try a lower quality or a different format.
Will this meet an upload limit? If you have a 2MB limit and the converted size is still too big, lower quality and convert again.
Is the “smaller file” worth the visual hit? If the file drops a lot in size, but the image looks rough where it matters, raise quality and try again.
A realistic workflow for repeat conversions
I often use a quick two-pass approach. First, I pick JPEG at the default 80% quality and convert. Then I check the size results. If the converted file is still larger than I want, I move the quality down one notch and run Convert & Download again. If the image starts to look worse in faces or text, I switch to PNG or WebP and compare. The key is that the tool shows the format and both sizes right after it finishes, so you are not guessing what changed.
Why the preview matters before you commit
After you select an AVIF file, the preview section appears with the image and the file name. This is small, but it prevents wasted conversions. If you pick “IMG_4021.avif” but you meant “IMG_4027.avif,” you will notice it in the preview right away.
More reading on image formats
If you want a clear overview of how common image formats differ and when to use each one, MDN’s guide to image file types is a strong reference. For a practical look at how file input works on the web and why you see a choose-file step, MDN’s file input documentation is helpful.
Pro-Tips for Getting the Most Out of AVIF Conversion
Use the size readout as your “done” signal. Don’t stop at “it downloaded.” Check Converted Size and make sure it fits your real limit, like an upload cap or email attachment size.
Pick format based on the destination. If it’s a photo for general sharing, try JPEG first. If you need crisp edges or transparency behavior, try PNG. If it’s for a modern web use case, try WebP and compare sizes.
Change one thing at a time. Keep the format the same while you test quality steps, then switch formats. This makes it easier to understand what caused the size and look change.
Pencil Sketch Converter
What is Image to Pencil Sketch Converter
Image to Pencil Sketch Converter helps when you have a photo that feels too “photo-like,” but you need a sketch-style look for a profile image, a poster draft, or a school project. You can get close with editing apps, but they often take time and the controls can be hard to predict.
The free Image to Pencil Sketch Converter by FlexiTools.io is a practical fix: you drop in an image, adjust a few sliders, and generate a pencil sketch result on the same screen. Within 60 seconds, you can pick a JPG, PNG, or WEBP file (up to 10MB), click Convert to Sketch, and download the sketch. Want a lighter sketch, or one with darker lines?
How to Use Our Image to Pencil Sketch Converter
Add an image in the upload area that says Drag & drop an image here or click to browse. After you choose a file, the Convert to Sketch button changes from disabled to available, and you will see your image in the Original preview box.
Adjust the sliders labeled Sketch Intensity, Brightness, and Contrast. Each slider shows its current number to the right, so you can see exactly what changed as you drag.
Click Convert to Sketch (or press Enter) to generate the result. The Pencil Sketch preview updates, and a small status area on the page announces changes as the result appears.
Use Reset to return the controls to their starting values (Intensity 5, Brightness 0, Contrast 0), then convert again to compare. When you like what you see in the Pencil Sketch preview, click Download Sketch.
Why FlexiTools.io Offers the Best Image to Pencil Sketch Converter
Side-by-side previews keep you honest
You always see two labeled boxes: Original on the left and Pencil Sketch on the right. This makes it easier to judge whether your changes improved the look or just made it darker. It also saves you from flipping between tabs or windows.
Controls are concrete, with visible numbers
Each slider has a clear label and a number readout next to it. That detail matters when you find a setting you like and want to repeat it on another image. You are not guessing where the handle was.
It prevents common “why won’t this work?” moments
The Convert to Sketch button is disabled until an image is selected. That sets expectations right away. If you enter something invalid, the tool shows clear error messages, so you are not left wondering what went wrong.
Stable layout while you work
The page reserves space for key sections, so the layout does not jump around when previews and messages update. When you are tweaking intensity and running conversions a few times, that stability keeps your eyes on the previews instead of chasing buttons that moved.
Built for keyboard and screen reader use
The tool includes proper labels for inputs, visible focus states, and a status region that announces updates. You can also press Enter to convert, which is helpful when you are fine-tuning values and want fewer mouse trips.
This tool: Drag and drop an image, adjust three sliders with numeric readouts, press Enter to convert, then download the sketch.
Typical editors: Extra panels and modes, hard-to-repeat settings, and a lot of steps just to test one look.
One-shot converters: No brightness or contrast control, so you get a result that is “close” but not usable.
Jumping layouts: Buttons shift when results load, which makes repeated tries annoying.
A Deeper Look at Pencil Sketch Results
A pencil sketch look usually comes down to three things you can see right away in the result preview: edges, tone, and contrast. Edges are the lines that define shapes, like the outline of a face or the edge of a building. Tone is how light or dark the bigger areas look, like a sky or a wall. Contrast is the gap between the lightest and darkest parts.
What “Sketch Intensity” changes
Sketch Intensity affects how strongly the sketch character shows up in the final preview. At lower intensity, the result tends to look softer and more subtle. At higher intensity, you usually see stronger lines and more obvious texture, which can be great for bold subjects but harsh for smooth skin or flat backgrounds.
The helpful part is that intensity is not hidden behind a vague name. You can move it from 1 to 10 and watch the look change in a way that matches what the label says. If you are trying to keep a natural feel, start near the middle value (5 is the default) and nudge up or down from there.
Brightness is about the paper, not the lines
Brightness shifts the overall lightness of the result. If the sketch looks gray and heavy, raising brightness can bring back the “paper” feel, where the light areas look more open. If the sketch looks washed out, lowering brightness can help the subject stand out again.
On screen, the brightness value sits next to the slider, ranging from -50 to 50. That range is useful for controlled changes. You can make a small move, see the preview, and decide if you want more.
Contrast decides what gets attention
Contrast controls separation. Higher contrast pushes dark areas darker and light areas lighter, which often makes the subject pop. Lower contrast can look smoother, but it can also blur the difference between the subject and the background.
This is where the Original preview helps. If the original photo already has harsh lighting, adding more contrast can clip details and make the sketch look crunchy. If the original is flat, a contrast boost can add life.
Interpreting the two previews like a quick checklist
Use the left preview to judge what you started with and the right preview to judge what changed. Look for three quick signals:
Edges: Do important outlines stay clear, like eyes, hair, and jawline?
Background: Did the background turn into noisy texture that distracts?
Midtones: Are cheeks, skies, and walls readable, or do they turn into a flat gray?
A small, real workflow that saves time
When I’m converting a portrait, I usually notice the background first. Busy backgrounds can become scratchy in a sketch. One time, a hallway photo looked fine as a photo, but the sketch result made every wall edge compete with the face. I hit Reset, lowered Sketch Intensity a bit, then raised Contrast slightly so the face stayed defined without making the hallway too loud. Seeing Original and Pencil Sketch side by side made that choice obvious.
Why the tool uses canvases for previews
Both previews are shown as canvases on the page, which is why they can update in place as you adjust settings and convert again. If you are curious how canvas-based rendering works on the web, MDN’s Canvas API guide is a solid reference. For how live page updates can be announced to assistive tech, MDN on ARIA live regions explains what that status area is doing.
Pro-Tips for Getting the Most Out of Image to Pencil Sketch Conversion
Use the value readouts to build “recipes.” If you like a look, write down the three numbers (Intensity, Brightness, Contrast). You can reuse them across a set of images for a consistent style.
Reset is your fastest comparison tool. Instead of dragging sliders back by feel, hit Reset, change one slider, and convert again. It helps you learn what each control does in your own images.
Fix the background before you chase detail. If the background turns noisy in the sketch preview, lower intensity first. Then bring back subject clarity with contrast, one small step at a time.
Video Converter
What is Video Format Converter
Video Format Converter turns your clips into the format and size you need without leaving your browser. Stuck with a file your editor, phone, or social app won’t accept? The free Video Format Converter by FlexiTools.io lets you drag and drop a video, pick MP4, WEBM, MKV, or AVI, choose a resolution, trim by seconds, and download the result. In the next 60 seconds, you can load a file, set the output format and 1080p/720p/480p or keep Original, trim start and end, click Convert, and watch the progress bar until your download is ready.
How to Use Our Video Format Converter
Add your video
Drag & drop a file into the upload area or click Browse Files. Supported inputs include MP4, AVI, MOV, MKV, WEBM, FLV, and WMV.
Choose output settings
Select an Output Format (MP4/H.264, WEBM/VP9, MKV, or AVI) and set Resolution to Original, 1080p, 720p, or 480p.
Optional: Trim by seconds
Check Trim Video, then enter Start (s) and End (s). Only that segment will be converted.
Convert and download
Click Convert. Track progress in the bar and percent readout. When Conversion Complete appears, click Download or start a New Conversion.
Why FlexiTools.io Offers the Best Video Format Converter
Private, in‑browser conversion
Your video is processed on your device. No sign‑ups, no uploads, no waiting on a server queue.
Simple controls that cover real needs
Pick the format, pick the resolution, and trim by seconds. The UI stays out of your way.
Clear feedback and control
Progress percent, a visual bar, status messages, and Cancel when you need to stop and revise settings.
Fast handoff to your workflow
A direct Download button and New Conversion keep your tasks moving.
FlexiTools.io vs typical alternatives
FlexiTools.io: In‑browser conversion and download - Alternatives: Required uploads
FlexiTools.io: MP4, WEBM, MKV, AVI outputs - Alternatives: One format only
FlexiTools.io: 1080p/720p/480p + Original resolutions - Alternatives: Hidden or fixed sizes
FlexiTools.io: Built‑in trimming - Alternatives: Extra steps in another tool
A Deeper Look at Video Formats, Codecs, and Resolution
Video files bundle two big ideas: the container and the codec. The container is the “wrapper” that holds video, audio, subtitles, and metadata. Examples include MP4, WEBM, MKV, and AVI. The codec is the compression method that actually encodes the video frames and audio samples. When you pick MP4 (H.264), you’re choosing the MP4 wrapper with H.264 video inside. For WEBM (VP9), the wrapper is WEBM and the video codec is VP9. This distinction matters because some platforms care more about the codec than the wrapper.
MP4 (with H.264) is widely compatible and a safe choice for most devices and websites. WEBM (with VP9) is efficient and delivers smaller files at similar quality for many scenes, especially at HD resolutions. MKV is flexible and can hold many tracks, but some mobile apps don’t preview MKV by default. AVI is older and can be useful for legacy needs, yet its feature set is limited compared to newer containers. Picking the right combination depends on where the video will play. For a quick overview of containers and codecs, see MDN’s guides on media container formats and video codecs.
Resolution controls pixel dimensions. Downscaling from 4K to 1080p or 720p can dramatically cut file size because there are fewer pixels to encode. If your target screen or social slot is 720p, encoding at 720p is smarter than keeping a higher resolution that will be downscaled on the fly. For email or messaging, 480p is often enough, and the smaller file travels faster. If you need maximum clarity on large screens, keep Original, but remember that higher resolution means longer processing time and larger files.
Trimming is a simple but powerful step. By selecting Start and End in seconds, you export only the slice you need. This shortens processing time, reduces file size, and keeps your final cut focused. Not sure where to trim? Take a quick pass — you can always run a second conversion if you want a longer or shorter segment. Clean cuts also help when you’re preparing multiple versions of a clip for different platforms.
Why do file sizes vary so much? Beyond resolution, the codec’s efficiency and the content of the video matter. Shots with lots of motion, noise, or tiny details take more bits to look good. Static scenes compress more easily. That’s why two 60‑second clips at the same resolution and format can have very different outputs. If your target is a strict size or duration, lowering resolution and trimming off unused parts usually gives the biggest win before you worry about deeper encoding tweaks.
Compatibility tips:
For cross‑platform sharing, MP4 (H.264) is still a great default. It plays almost everywhere.
For modern browsers and web usage, WEBM (VP9) can be smaller at the same perceived quality.
If a tool or device rejects a file, try another container with a common codec — e.g., MP4 instead of MKV — keeping the same resolution.
Performance and reliability: video conversion takes CPU, memory, and time. Larger files and higher resolutions need more of each. Keep the tab open, avoid heavy background tasks while converting, and let the progress bar reach 100%. If a conversion stalls, try a lower resolution or a shorter trim segment, then re‑run. If a result has playback issues, convert to MP4 (H.264) at 720p — that combination works in most software.
Audio tracks ride along inside the container. If you notice silent output, the original may use an uncommon audio codec. Try a different output format that your target app prefers. For social or chat, a short MP4 (H.264) with standard stereo audio is often the most reliable.
Two practical playbooks:
Social clip: Trim to the highlight, choose MP4 (H.264) at 720p, convert, download, and post. You’ll get a good balance of clarity and size.
Archive to share: Keep Original resolution, pick MKV or MP4 depending on your workflow, and convert. If a recipient can’t play the file, re‑encode to MP4 at 1080p.
You don’t need deep encoding knowledge to get a solid result. A clear target — where the video will play and what size you can accept — guides your choices. Pick the format your destination likes, pick a resolution that fits the screen, trim the clip, and you’re done.
Pro-Tips for Getting the Most Out of Video Conversion
Start with MP4 (H.264) at 720p for quick sharing; switch to WEBM (VP9) for smaller web files if your audience supports it.
Trim first — shorter clips convert faster and keep files lean.
If compatibility is a question, downscale one step and try MP4; it’s the most widely accepted pairing.
Image Resizer
What is Image Resizer
Image Resizer makes it easy to change image dimensions and file size without losing clarity. Need a smaller header image for your site, or a quick 2x version for a social post? The free Image Resizer by FlexiTools.io shows your original and resized previews side by side and lets you control scale, width and height, aspect ratio, quality, and output format. In the next 60 seconds, you can upload a photo, pick Percentage or Dimensions, keep the aspect ratio on, set a quality level, choose JPEG, PNG, or WebP, and download the final image.
How to Use Our Image Resizer
Upload your image
Drag and drop or click to upload JPG, PNG, WebP, or GIF. You’ll see Original and Resized previews plus dimensions for each.
Pick a resize mode
Choose Percentage for a quick scale (1-500%), or Dimensions to set Width and Height in pixels. Keep Maintain aspect ratio checked to prevent stretching.
Set quality and format
Use the Quality slider to fine tune file size - most images look great at 75-92. Choose an Output Format: JPEG, PNG, or WebP.
Apply and download
Click Apply Resize to update the preview and new dimensions. Click Download to save the resized file, or New Image to start again.
Why FlexiTools.io Offers the Best Image Resizer
Side-by-side clarity
Original and Resized previews make it simple to see changes before you download.
Flexible controls that matter
Scale by percent or exact pixels, keep or release aspect ratio, and set quality and format for the right balance of look and size.
Fast, private, in-browser
Your image stays on your device. Status messages confirm each step.
FlexiTools.io vs typical alternatives
FlexiTools.io: Percentage or pixel-based resize - Alternatives: One fixed mode
FlexiTools.io: Quality slider and format choice - Alternatives: No control over output
FlexiTools.io: Live preview with dimensions - Alternatives: Blind changes
FlexiTools.io: Simple Apply → Download flow - Alternatives: Multi-step wizards
A Deeper Look at Image Resizing, Quality, and Formats
Resizing is about pixels. Fewer pixels mean a smaller file and faster loads. The two paths are simple: scale by a percentage of the original or set a new width and height in pixels. Leaving Maintain aspect ratio on keeps the image from stretching - the height will follow the width so the picture stays natural. Turning it off lets you fit a fixed box, but be careful - stretched photos look off in a feed or on a page.
The Quality slider changes how the image is encoded when you pick JPEG or WebP. Lower quality reduces file size by discarding subtle detail; higher quality keeps more detail at a larger size. For photos, a range of 75-92 usually looks clean. For images with text, logos, or UI, even small losses can blur edges - consider PNG or WebP at higher quality for crisper lines. PNG is lossless, so the quality setting typically has little effect; size is driven mainly by dimensions and image complexity.
Which format should you choose?
JPEG: great for photos and gradients, tiny files at mid quality. Not ideal for sharp text or icons.
PNG: lossless, best for graphics, logos, and UI screenshots. Larger than JPEG for photos.
WebP: a modern choice that often beats JPEG in size at similar visual quality and can be lossless for graphics.
If you’re working for the web, resizing down to the display width is the biggest win. A 4000 px image squashed into a 1200 px slot wastes bytes. Start by matching your site’s content width, then adjust quality. For background on how browsers handle images and drawing, MDN’s overview of the Canvas 2D API is a quick primer. For choosing a format, MDN’s image file type guide explains strengths and trade-offs for each format.
A few practical patterns:
Hero banners: set width to your page’s content width or 2x for high-DPI displays - then pick WebP or JPEG around 80-90 quality.
Product shots: if they have crisp edges or text overlays, try PNG or WebP at higher quality to avoid halos.
Blog images: resize to 1200-1600 px wide, JPEG or WebP at 75-85. This keeps pages light and sharp on common screens.
Thumbnails: tiny slots benefit from a clean resize and moderate quality; heavy sharpening isn’t needed when pixels are already few.
Why aspect ratio mattersEyes notice shape first. When ratio changes, faces look wide or tall, circles become ovals, and brand marks feel off. Keeping aspect ratio on means you set only one dimension and the other follows. If you must fit a box, resize to the nearest dimension and let the platform crop. Your image will feel natural while still fitting the design.
Quality vs size - which moves the needle more?Resizing down saves more bytes than nudging quality alone. Halving width quarters the pixel count. That’s a big reduction before you even touch compression. Use this simple sequence:
Resize to the real display width.
Choose the right format for the content.
Tune quality only as much as needed.
This approach keeps images crisp and fast without trial and error. And you don’t need a heavy editor for it - a quick pass in the browser does the job in seconds.
Pro-Tips for Getting the Most Out of Resizing
Resize first, then lower quality in small steps - you’ll get big savings with fewer trade-offs.
Keep aspect ratio on for photos and brand assets to avoid distortion.
Prefer WebP for photos when supported and PNG for graphics with sharp edges or transparency.
Bulk Image Compressor
What is Image Compressor
Image Compressor shrinks JPG, PNG, and WebP files so they load faster and take less space. Got a batch of photos that feel too heavy for the web or email? The free Image Compressor by FlexiTools.io lets you drag and drop up to 20 images, set quality, cap the max width, pick an output format, and process everything in your browser. In the next 60 seconds, you can drop your files, click Compress Images, watch the progress bar, and download the results as a ZIP.
How to Use Our Image Compressor
Upload your images
Drag and drop or click to browse. Supported types: JPG, PNG, WebP. Limits: 10 MB per file, up to 20 images.
Set your options
Quality: choose 10-100 with live display. Max Width: enter a pixel cap to resize down - leave blank to keep original width. Output Format: keep Original or convert to JPEG, PNG, or WebP. Optionally tick Preserve metadata if supported.
Compress
Click Compress Images. The progress bar and status show what’s happening. You’ll see a summary and a results list when it’s done.
Download
Click Download All (ZIP) to save your compressed files in one archive. Use Clear All to start a new batch.
Why FlexiTools.io Offers the Best Image Compressor
Batch processing built in
Handle up to 20 images at a time with clear limits and a simple progress bar.
Quality, resize, and format control
Balance quality, width, and file type to reach your size target - no guesswork.
Fast, private, in-browser
Your files are processed locally in your browser. Short, helpful status messages guide each step.
Ready for the web
Pick WebP for modern compression or stick with JPEG/PNG for broad compatibility.
FlexiTools.io vs typical alternatives
FlexiTools.io: Batch compress with progress and a ZIP download - Alternatives: Single-file tools or gated exports
FlexiTools.io: Quality, max width, and format in one panel - Alternatives: Hidden or fixed settings
FlexiTools.io: Clean, focused interface - Alternatives: Cluttered menus and extra steps
FlexiTools.io: Optional metadata preservation - Alternatives: No control over EXIF
A Deeper Look at Image Compression, Formats, and Smart Settings
Lossy vs lossless in plain terms
Compression comes in two main flavors. Lossy methods - like JPEG and WebP in lossy mode - shave off details the eye is less likely to notice. You get much smaller files at medium quality. Lossless methods - like PNG or WebP lossless - keep every pixel but usually result in bigger files. For photos, lossy is your best bet most of the time. For graphics with sharp edges, logos, or UI shots, lossless PNG or WebP lossless can keep lines clean.
The Quality slider controls how aggressive compression is. Lower quality means smaller files with more visible artifacts; higher quality means larger files with crisper detail. A practical range for photos is often 60-85. Try 80 first, then step down if you need smaller sizes.
Resize is the biggest win
Capping width often saves more bytes than changing quality alone. If your site displays images at 1,200 px wide, a 4,000 px upload wastes bandwidth. Use Max Width to set a sensible cap for your layout. Resizing down reduces pixels, and fewer pixels means fewer bytes. Keep aspect ratio in mind - a width cap preserves it by scaling the long side proportionally.
If you work with high-DPI displays, plan your caps accordingly. A hero image may need a higher cap than a small card thumbnail. For background and guidance, MDN’s overview of responsive images explains how different sizes fit different screens. MDN’s image file type guide also helps you pick a format that fits your content.
Choosing the right output format
JPEG: great for photos - tiny files at mid quality with smooth gradients. Not ideal for logos or text.
PNG: lossless and crisp for graphics and screenshots. Larger than JPEG for photos.
WebP: efficient modern format. Often smaller than JPEG at the same visual quality and can be lossless too. Some older tools may not support it, but modern browsers do.
Original: keeps the source format - handy when you only want resizing or quality changes within the same format.
Not sure which to choose? Photos: WebP or JPEG. Logos/UI: PNG or WebP lossless. If a platform or CMS prefers one type, select that in Output Format.
Metadata and privacy
Image files can store EXIF and other metadata like camera model, capture date, and GPS coordinates. Keeping metadata can help photographers and workflows that rely on it. For public sharing, removing it can cut a few kilobytes and protect privacy. The Preserve metadata option gives you a choice - if the browser pipeline and selected format support it.
Balancing speed, size, and quality
Start at Quality 80 and a sensible Max Width for your layout.
Compare the results - does the image still look good at common zoom levels?
If you need smaller files, lower quality in steps of 5 or shave more pixels with a smaller Max Width.
If text looks fuzzy, try PNG or WebP lossless for that item.
Remember: people notice slow pages first. A slightly smaller, fast image beats a perfect but heavy one on most screens.
Typical use cases
Blog posts and landing pages: set Max Width to your content width - 1,200 to 1,600 px is common - and use WebP or JPEG at 70-85.
Product catalogs: keep crisp edges for logos or layered graphics - PNG or WebP lossless can help.
Email: aim for very small sizes - resize aggressively and keep quality modest, since many clients downscale anyway.
Social: check the platform’s display size, resize to match, and pick a format it likes.
A quick test loop: upload, compress at your default settings, review, then tweak quality or width and re-run for a tough image. You’ll dial in a preset that works for most of your content.
Pro-Tips for Getting the Most Out of Compression
Resize first, then tune quality - fewer pixels give the biggest savings.
Use WebP for photos when you can - you’ll often get the same look for fewer bytes.
Keep logos and UI in PNG or WebP lossless to avoid blur on edges and text.