01 / Fast steps
- Choose Extreme, Recommended or Low above the drop area.
- Drop or paste your PNG images.
- Compression starts automatically.
- Download the compressed files.
Compress PNG
Drop PNG graphics and download files that are typically 60-90% smaller, with transparency intact. No limits, no upload.
drop your files anywhere in this area or paste it with Ctrl+V
Your files never leave your device. This tool even works offline.
PNG
02 / Best for
- Shrink screenshots and UI assets before sharing them.
- Lighten transparent logos for web pages and documents.
- Meet upload size limits without losing transparency.
03 / Why here
- Real savings, honestly achieved: the PNG is re-encoded as WebP, which keeps transparency and typically cuts 60-90% of the size.
- No file count or size caps: your hardware does the work, so we have no limits to impose.
- Runs entirely in your browser, so images never leave your device.
04 / Keep in mind
- The output is WebP, not PNG: re-encoding PNG as PNG rarely saves real space. Use WebP to PNG afterwards if you specifically need PNG back.
- The Extreme and Recommended profiles also downscale very large images.
Tool connections
Related tools
Just converted a file here? Click a tool that reads it and your new file is handed over automatically, no re-upload needed.
01Compress ImageShrink JPG, PNG and WebP images with three compression profiles, entirely in your browser.02WebP to JPGConvert WebP images to JPG so they open in any editor, uploader or older application.03WebP to PNGConvert WebP images to PNG with transparency preserved, right in your browser.04WebP to PDFConvert WebP images into PDF documents, one page per image, entirely in your browser.05Resize ImageResize and crop PNG, JPG, WebP, GIF and BMP images visually or by typing exact pixel dimensions.06Image to Text (OCR)Extract text from images and screenshots with OCR that runs in your browser. Free, no upload, no page limits.
Good to know
Questions & answers
01Why is the output WebP instead of PNG?
Because a PNG is already compressed as well as PNG knows how. The format applies a per-row prediction filter and then DEFLATE, both lossless, so a second pass has nothing left to find. Dedicated PNG optimisers only win by reducing the colour palette or trying smarter filter combinations, and neither approaches what a lossy format achieves. WebP lossy mode carries the same 8-bit alpha channel, so transparency survives while the file genuinely shrinks.
02How much does it really save?
It depends entirely on what the PNG holds. Screenshots and photographic images stored as PNG usually collapse by 80 per cent or more, because PNG is the wrong format for that content in the first place. A flat icon with a handful of colours already compresses efficiently as PNG, so there the saving is modest and occasionally close to nothing. When the result would not be smaller, the original comes back untouched.
03Is transparency preserved?
Yes. WebP stores 8 bits of alpha per pixel, the same 256 levels of opacity PNG offers, so soft shadows and anti-aliased edges come through intact. Be aware of the trade this makes: the alpha channel is preserved but the colour data is re-encoded lossily, so keep the PNG as your master copy for anything you will edit again.
04Is Compress PNG free to use?
Yes, with no sign-up, no watermark and no limit on file count or size. Everything runs in your browser, so the images never leave your device, and WebP to PNG is one click away if you need the extension back.