Compress Image

HOW IT WORKS

1. 01
   Drop an image

   Drop a JPEG, PNG, or WebP onto the page — or click to browse. The file is read directly by the page and stays in memory on your device.

2. 02
   Tune the quality slider

   Move the slider and watch a live wipe comparison: the original and the compressed result side by side at identical pixels, with an honest size readout as the image re-encodes.

3. 03
   Everything runs on your device

   A MozJPEG, libwebp, or oxipng-class encoder runs as WebAssembly inside the page. Your image is processed in memory in your browser — there is no upload step at all.

4. 04
   Download the result

   When the preview looks right, download the compressed file. The output format always matches the input format — a JPEG stays a JPEG, a PNG stays a PNG.

FAQ

Is my image uploaded?

No. The encoder runs as WebAssembly inside the page, and your image is processed in memory on your device. It is never sent to a server.

What formats are supported?

JPEG, PNG, and WebP. The output format matches the input format — this tool compresses your image, it does not convert between formats.

Why does PNG show an effort control instead of quality?

PNG compression here is lossless — the pixels stay identical. Instead of a quality trade-off, the slider controls how hard the oxipng optimizer works to find a smaller file.

Is metadata like location removed?

For JPEG and WebP, yes — re-encoding removes metadata, including location: the compressed file is rebuilt from raw pixels, so EXIF data such as GPS position and camera details is not carried over. PNG optimization is lossless and does not re-encode, so PNG metadata chunks may remain.

What is the size limit?

Up to 25 MB per file. Larger files are rejected before any processing starts, with a clear message — nothing is truncated silently.