Lossy Image Compression
Lossy compression throws away detail your eye is unlikely to miss, which is why it can make photos 10× smaller. It's ideal for previews, thumbnails, chat and anywhere speed matters more than perfection.
- Never uploaded
- Instant, no sign-up
- Works offline
Drop images here
Files stay in your browser — nothing is uploaded.
About this tool
This page starts at 60% JPG quality. Watch the before/after preview and raise the quality if you see blockiness or banding in skies.
How it works
- 1
Add your photos.
- 2
Pick JPG or WebP and set the quality (60% is a strong start).
- 3
Compare, then download.
Features
- Big savingsOften 80–95% smaller than a camera original.
- Live previewSee artifacts before you download, not after.
- WebP optionWebP holds up better than JPG at very low quality.
- Private by designEverything runs on your device. No uploads, no account, no watermark, and EXIF/GPS data is stripped from the result.
Supported formats
Input: JPG, PNG, WebP, GIF (first frame), BMP, SVG, AVIF, plus TIFF/HEIC where your browser can decode them. Output: PNG, JPG or WebP.
Frequently asked questions
What is lossy compression?
Compression that permanently discards some image detail to save space. JPG and WebP are lossy formats.
When should I avoid it?
For screenshots with text, logos and images you'll edit again — use PNG (lossless) for those.
What artifacts should I look for?
Blocky squares, color banding in smooth gradients, and halos around sharp edges.
Are my images uploaded to a server?
No. Files are decoded, processed and re-encoded by your browser using the canvas API and Web Workers. Nothing is sent to any server, and there is no account or storage. Closing the tab discards everything.
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