IMAGE TOOL · CLIENT-SIDE
Image Compressor
Shrink image file sizes with a quality slider and see the savings instantly. Compare before/after sizes, export to JPEG or WebP, and batch download as ZIP.
Drop images here, or browse
JPEG, PNG, WebP, GIF — unlimited files
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Quality guide
Why compress?
Uncompressed images are the #1 cause of slow page loads. A 5 MB photo compressed to 500 KB loads 10x faster, improves Core Web Vitals, and saves bandwidth — especially on mobile. Most visitors won't notice any visual difference at quality 80.
Smart compression, right in your browser
Our compressor uses the Canvas toBlob() API with a quality parameter to produce
optimized JPEG or WebP files. The live size comparison shows you exactly how much space you're saving before you
download. Everything runs on-device — your photos never leave the browser.
Upload any number of photos.
Slide to balance size and sharpness.
Save individually or as a ZIP batch.
Frequently Asked Questions
How does image compression work?
Image compression reduces file size by finding and removing redundant data. Lossy compression (JPEG, WebP) discards subtle color and brightness variations that the human eye is less sensitive to. The quality slider controls how aggressively data is discarded — lower values mean more compression and smaller files, higher values preserve more detail.
What quality should I use?
For web use, quality 75–85 is the sweet spot — images look sharp on screen while cutting 50–70% of file size. For print or photography portfolios, use 90+. For thumbnails and previews, 60–70 is often sufficient. WebP at quality 80 typically looks identical to JPEG at quality 90 but with a smaller file.
Can I compress without losing quality?
You can get very close. WebP at quality 80–85 is visually nearly lossless for most images while cutting file size dramatically. For truly lossless compression, use PNG output — though the savings will be smaller. The tool shows exact before/after sizes so you can find the right balance.