How to Compress Images Online Free (JPG, PNG, WebP)
Compress JPG, PNG, and WebP images in your browser — no uploads, no watermarks, no signup. Shrink file size by 60-80% with almost no visible quality loss.
Why compress images at all?
Image weight is the single biggest page-load cost on most websites. A 3 MB hero photo takes 12× longer to load on a slow connection than a 250 KB version — and users leave pages that don't load within 3 seconds. Email attachments have hard limits (25 MB on Gmail). Many CMS platforms cap individual uploads at 2 MB. Compressing first sidesteps every one of those problems.
Lossy vs lossless compression
Lossy compression (JPEG, WebP) throws away image data that your eye can't easily detect — enormous size wins, imperceptible quality loss at 80-90% quality. Lossless compression (PNG, WebP lossless) keeps every pixel identical but finds cleverer ways to encode them — smaller wins (10-30% typically) but perfect fidelity. The image compressor lets you pick which mode per image.
How much can you actually save?
On typical smartphone photos (4000×3000, straight out of camera), dropping to 80% quality and resizing to 1920px wide cuts the file from ~4 MB to ~300 KB — a 93% reduction. For screenshots stored as PNG, converting to WebP lossy at 85% quality typically saves 70-85%. Logos and line art usually stay as PNG and gain 20-40% via lossless re-encoding.
Which format should you use?
| Use case | Best format | Why |
|---|---|---|
| Photos for the web | WebP (fallback JPEG) | 25-35% smaller than JPEG at same quality |
| Screenshots with text | PNG or WebP lossless | Lossy compression blurs letterforms |
| Logos, icons | SVG, or PNG fallback | Vector scales cleanly, tiny file |
| Animated content | WebP or GIF | WebP is 30-50% smaller than GIF |
| Print-quality photos | JPEG at 95%+ | WebP support is inconsistent in print workflows |
Everything runs in your browser
The compressor uses the browser's native canvas and WebAssembly image encoders — no upload, no server. That matters if you're compressing private photos, client work, or anything you'd rather not hand to a random web service. You can verify: open DevTools → Network tab, drop an image, and watch that no request fires.
Related image workflows
If your problem is dimensions rather than file size, use image resizer. To change format (say, PNG → WebP), image converter handles it without recompressing. For SVG icon files, the dedicated SVG optimizer strips editor metadata and collapses paths — often 40% savings on exports from Figma or Illustrator.
Featured Tools
Try these free tools directly in your browser — no sign-up required.
Image Compressor
Compress JPEG, PNG, and WebP images directly in your browser. Reduce file size without losing noticeable quality — no upload required.
Image Resizer
Resize images to exact pixel dimensions or by percentage in your browser. Maintain aspect ratio or set custom width and height.
Image Resizer
Resize images to exact pixel dimensions or by percentage in your browser. Maintain aspect ratio or set custom width and height.
SVG Optimizer
Paste SVG code and remove unnecessary attributes, comments, and metadata. See the size reduction percentage and copy the optimized SVG.