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

1. Upload your images

• Drag and drop or click to browse. Supported types: JPG, PNG, WebP. Limits: 10 MB per file, up to 20 images.

2. 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.

3. 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.

4. 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.