Compress PNG

PNGs are reduced to a smart palette of up to 256 colours, the technique popularised by TinyPNG, and then repacked by OxiPNG, a lossless optimiser. For screenshots, logos, icons and illustrations the difference is invisible and the file is usually 50–70% smaller. Transparency, including soft edges, is kept. Choose Best quality for a strictly lossless result.

Use Compare on any image to drag between the original and the compressed version before you download.

• Resize large photos. A 12-megapixel phone photo is about 4000 pixels wide; a website rarely shows images wider than 1920. Setting a maximum size is often the single biggest saving.
• Use the right format. Photos belong in JPG or WebP; screenshots, logos and graphics with flat colours in PNG. WebP is typically 25–35% smaller than JPG and works in all current browsers.
• Compress from the original. Each round of lossy compression loses a little more detail.

Compression runs in your browser using WebAssembly versions of MozJPEG, libwebp and OxiPNG, the codecs behind Google’s Squoosh (licences). Your images are never uploaded. Compressed files are saved without EXIF metadata, so camera details and GPS location are not shared.

• Saving photos as PNG

  A photo saved as PNG is often five to ten times the size of a good JPG with no visible benefit. Choose JPG or WebP under "Save as".

• Compressing a screenshot as JPG

  Text and sharp edges in screenshots blur and ring as JPG. Keep screenshots as PNG; the palette compression here shrinks them just as much.

• Squeezing a huge photo into a tiny file

  A 4000-pixel photo at 50 KB looks blocky. Reduce the pixel size first (the File size mode does this for you) and the result stays clear.