Image Compressor JPEG, PNG & WebP — entirely local
Shrink JPEG, PNG and WebP files with a quality slider and max-width cap — side-by-side preview, no upload, no watermark.
0 keeps the original width.
About Image Compressor
The image is read with FileReader, drawn onto a canvas at the requested maximum width, and re-encoded at the quality you choose — all inside the tab. Nothing is transmitted anywhere, so this is safe for screenshots containing credentials, contract scans or product photos you would rather not hand to a free online service.
Quality is the main lever: 75 to 85 is the sweet spot for photographs, where further reductions become visible around edges while saving very little extra bytes. WebP usually lands 25 to 35% smaller than an equivalent JPEG, so try it first for web use; PNG is lossless and only makes sense for flat graphics with sharp text, where JPEG ringing would show. Capping max width is often a bigger win than lowering quality — most pages never need an image wider than 1920 pixels. Always compare the two previews before downloading.
- 100% free, no signup required
- Works entirely in your browser
- Your data never leaves your device
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