How to Compress an Image (Reduce Photo Size Without Losing Quality)
Large images slow down websites and bounce off email size limits. Compressing them removes invisible overhead and re-encodes the image so the file shrinks while still looking sharp. Kitolity compresses images entirely in your browser — your photos are never uploaded.
The tool
Image Compressor
Step by step
- Open the Image CompressorGo to the Image Compressor — it runs locally, so your photos stay on your device.
- Add your imageDrop in a JPG, PNG, or WebP, or click to select it.
- Adjust the qualityChoose how aggressively to compress — lower quality means a smaller file.
- DownloadDownload the compressed image. Nothing is uploaded — it all happens in your browser.
Will compression ruin my image?
Not if you pick a sensible level. Modern compression removes detail your eye won’t miss, so a well-compressed photo looks nearly identical at a fraction of the size. For web use you can often cut 50–80% with no visible difference; only push quality very low when size matters more than fidelity.
Which formats work best?
Use JPG for photographs (smallest size), PNG when you need lossless quality or transparency, and WebP for the best size-to-quality balance on modern browsers. The compressor supports all three.
Frequently asked questions
Do my images get uploaded?
No — compression runs entirely in your browser, so your photos never leave your device.
Is there a limit on how many I can compress?
No — because it runs locally, you can compress as many as you like, free, with no daily cap.
Which formats are supported?
Common web formats including JPEG, PNG, and WebP.