Image Compressor
Compress JPG, PNG, and WebP images directly in your browser. Resize, recompress, and convert format — all locally. Your images never leave your device.
Quick Reference
- JPEG — best for photos · supports quality control · no transparency
- WebP — modern format · 25–35% smaller than JPEG at same quality
- PNG — lossless · supports transparency · larger files
- Quality 70–80% usually looks identical to original at much smaller size
How to Use the Image Compressor
- Drop an image onto the upload zone or click to browse files.
- Pick a Resize preset (Original, Large, Medium, Small) or set custom dimensions with aspect-ratio lock.
- Pick a Quality preset (Best, High, Balanced, Small) or fine-tune with the custom slider.
- Choose your output Format — JPEG, WebP, or PNG.
- The image recompresses automatically. Click Download when you're happy with the result.
What Is Image Compression?
Image compression reduces file size by removing data the human eye can't easily detect. Lossy compression (JPEG, WebP) discards small details for big size savings — typically 70–90% smaller than the original. Lossless compression (PNG) preserves every pixel but offers smaller savings. Our tool uses your browser's built-in Canvas API to recompress images entirely on your device — no upload required.
Common Uses for Image Compression
- Website performance — faster page load times improve SEO and user experience.
- Email attachments — fit under 25 MB Gmail limit.
- Social media uploads — meet platform-specific file size caps.
- Cloud storage — save space on Drive, Dropbox, iCloud.
- Mobile data savings — smaller images = less bandwidth consumed.
- Format conversion — modernize old JPGs into smaller WebP.
Why Choose Our Image Compressor
- Privacy-first — 100% browser-based. Your images never upload anywhere.
- Side-by-side comparison — visually verify the result before downloading.
- Quality and resize presets — get great results without fiddling.
- Aspect-ratio lock — resize without distorting your image.
- Auto-recompress — see results instantly as you adjust settings.
- Three output formats — JPEG, WebP, PNG.
- No signup, no upload limits, no tracking.
Frequently Asked Questions
What's the best format for the web?
WebP for photos (25–35% smaller than JPEG, supported by all modern browsers). PNG when you need transparency. JPEG remains the safest fallback for very old browsers.
What quality setting should I use?
For most photos, the Balanced (70%) preset looks identical to the original but produces dramatic size reductions. Use High (80%) for hero images, or Small (50%) for thumbnails and previews.
Why is my PNG not getting smaller?
PNG is lossless — it can't trade quality for size like JPEG/WebP. The size mostly depends on image complexity. For real savings on photo-style PNGs, convert to WebP or JPEG instead.
What does "Lock aspect ratio" do?
With the lock enabled (default), changing the width automatically updates the height to keep your image proportional — no stretching or squashing. Click the lock icon to disable it if you want to set width and height independently.
Does the image compressor work offline?
Yes. Once the page is loaded, all compression runs locally in your browser using the HTML5 Canvas API.