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Reduce the file size of your photos and graphics directly in the browser. Pick an output format (JPEG or WebP) and a quality level, and the compressor re-encodes the image locally using the canvas engine — typically cutting file sizes by 50–90% with visually minimal difference.
Because the image never leaves your device, this is a safe compressor for personal photos, ID scans, screenshots, and work documents. No accounts, no watermarks, no batch limits — and since PureKit is a PWA, you can even compress images offline after the first visit.
It depends on the source. Photos exported from cameras and phones often shrink by 70–90% at quality 75–80. Screenshots and graphics with flat colors compress less dramatically but still benefit from WebP output.
For web use and email attachments, 70–80% is usually indistinguishable from the original while cutting the size dramatically. Go higher (85–90) for prints or detailed graphics, lower (50–60) for thumbnails.
Never. The compression runs locally in your browser using the HTML canvas API. Your images stay on your device — nothing is transmitted, stored, or seen by anyone else.
PNG stores images losslessly, which makes photo files enormous. Re-encoding a photo as JPEG or WebP trades a tiny, usually invisible amount of fidelity for a fraction of the file size. Keep PNG for screenshots and logos with sharp edges and transparency.
You can drop multiple files and compress them one after another. The tool has no upload queue because there is no upload — each file is processed instantly on your device.
PureKit · image-compress · Free online tool — files processed locally in your browser, no upload.