Compress Image

Yes. Compression runs entirely in your browser on an HTML canvas – the image bytes are never uploaded, cached, or tracked. After the page loads you can disconnect from the network and the tool still works.

Yes, 100% free with no cap on how many images you can compress. No sign-up, no watermark, no hidden file-size limit.

Yes. HTML, CSS, and JavaScript are self-contained. After the first page load you can turn off Wi-Fi and keep compressing indefinitely.

Input accepts JPG/JPEG, PNG, WebP, and GIF. Output can be JPEG, PNG, or WebP – the Auto setting keeps the input’s format except for GIF, which browsers cannot re-encode, so it is converted to JPEG automatically.

It depends on the image. A quality of 70-80 typically shrinks photos by 50-80% with little visible loss, and the resize slider compounds the savings. The stats line shows the exact before / after bytes and a savings percentage so you can dial in the trade-off.

For web or email, 70-80 is the sweet spot. For print or archival, 90+ preserves fine detail. For aggressive web optimisation, try 50-60 and watch the preview – if you cannot spot artifacts at the target viewing size, use it.

Yes. The Resize slider scales both dimensions between 10% and 100% while preserving the aspect ratio. Combined with Quality, a single pass can both shrink the pixel count and recompress – which often produces much smaller files than quality alone.

Not in this UI – it processes one image at a time so the side-by-side preview stays meaningful. Compression itself is fast (typically well under a second on a modern laptop), so working through a folder by drag-dropping one file at a time is still quick.

There is no fixed cap – it is governed by your browser’s canvas memory. Most modern browsers handle images up to 32 megapixels without trouble. Very large inputs may take a second or two to decode, and the Recompress button shows “Compressing…” while it works.

Yes. Canvas re-encoding strips EXIF metadata (camera model, GPS coordinates, edit history). That is a privacy upside – it prevents accidental leaks of location or device details when you share the file.