Image Compressor
Compress images by adjusting quality
Image Compressor is a free online tool from BrowserUtils that compress images by adjusting quality. It runs entirely in your browser — your data never leaves your device. No account required.
Drop image here or click to upload
How to use Image Compressor
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About Image Compressor
Free online image compressor. Reduce JPEG or WebP file size by adjusting quality, and compare the result side-by-side with the original. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
Image Compressor specs
- Runtime
- 100% client-side (browser)
- Built on
- HTML Canvas, FileReader, and the OffscreenCanvas API — all client-side image processing
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How does image compression work in the browser?
The tool draws your image onto a Canvas and re-encodes it using canvas.toBlob() with a quality parameter between 0 and 1. Lower quality values produce smaller files with more visible compression artifacts.
Which formats support quality-based compression?
JPEG and WebP formats support lossy quality adjustment. PNG is a lossless format and does not benefit from a quality slider, so the tool converts to JPEG or WebP for compression.
How much can I reduce an image file size with the compressor?
Typical savings range from 40% to 80% depending on the image content and quality setting. Photos with lots of detail compress well at quality 0.6-0.8 with minimal visible loss.
Is image quality lost permanently after compression?
Yes, lossy compression permanently discards data. Always keep your original file and treat the compressed version as a copy for web or sharing use.
Does the image compressor upload my photos to a server?
No. All compression happens locally in your browser using the Canvas API. Your images never leave your device.
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