Compress PNG
Make PNG files smaller without visible loss, or set an exact KB target. PNG is reduced to a 256-colour palette and re-packed with maximum deflate compression, the same technique TinyPNG uses, typically 60–80 % smaller. Processed on your device.
First run downloads the conversion engine (about 4 MB) once, then it is cached.
Good balance. JPG quality 72; PNG reduced to a 256-colour palette. Usually 50–80 % smaller.
With a target, quality is lowered until the file fits; only if that is not enough are the pixel dimensions reduced in small steps.
Advanced options
How image compression works here
JPG and WebP are re-encoded at a lower quality setting, which removes detail the eye rarely notices. PNG is reduced to a palette of 256 (or 64) colours and re-packed with the strongest deflate settings, the same trick TinyPNG uses. GIF stays GIF. All metadata such as EXIF and GPS location is stripped, which alone often saves 20–100 KB.
Set a target size when a form or portal enforces a limit. Quality is lowered first; only when that is not enough are the pixel dimensions reduced in 15 % steps, so the photo stays as sharp as the limit allows.
Which level should I pick?
Recommended suits nearly everything: photos for the web, email attachments, WhatsApp and listings. Low is for archival copies where you want the file smaller but do not want to think about quality. Extreme is for strict upload limits and thumbnails.
Nothing is uploaded
The engine is Rust compiled to WebAssembly and runs inside this browser tab. Files never leave your device, which makes the tools fast and safe for private photos and documents.
Frequently asked questions
How does PNG compression work?
PNG is reduced to a 256-colour palette and re-packed with maximum deflate compression, the same technique TinyPNG uses, typically 60–80 % smaller.
Will it stay a PNG?
Yes. The output is a PNG with the same dimensions unless you set a target size that cannot be met by quality alone.
Are my images uploaded?
No. The tool runs inside your browser with WebAssembly. Photos never leave your device, so it is safe for IDs, documents and private pictures.
Can I process many images at once?
Yes. Add as many files as you like; they are processed one after another and you can download everything as one ZIP.