Image Compressor
Compress JPEG, PNG, WebP, or AVIF in your browser — by quality or to a target file size, with live before/after. Nothing uploaded.
JPEG/WebP/AVIF only — quality is tuned to hit the size.
How to use
Choose an image, pick an output format, and either set a quality or a target size in KB — the compressor tunes quality to hit it. The new size, savings, and a preview update live; then Download. JPEG/WebP/AVIF are lossy; PNG is lossless (quality is ignored). Your image never leaves your device.
AVIF only appears if your browser can encode it. iPhone .heic photos can't be read by browsers directly — convert them to JPEG first, or ask and we can add a decoder.