Compress PNG images
Shrink PNG files right here in this tab. Nothing is uploaded, there is no account, and you see the saving on every file before you download it.
- Nothing leaves your device
- No account, no email
- Free, and no watermark
Drop your files here
Tap to pick your photos
or
Choose filesUp to 30 files at a time · 60 MB per file
What compressing a PNG actually does
PNG has no quality dial, so compressing one does not mean throwing anything away. Instead the pixel data is re-packed more efficiently — better filtering, a tighter palette where possible — and the result is byte-for-byte identical when decoded. Expect something between 5% and 30% off, depending on how well the original was written. Screenshots and exports from design tools usually have plenty of slack; files that already went through an optimiser have almost none. If you need a photograph to get dramatically smaller, PNG is the wrong format for it and converting to WebP or JPG will do far more.
How to compress a PNG
- Drop your PNG files into the box above, or click to pick them.
- Hit compress. Each file is re-encoded inside your browser.
- Check the saving shown next to each file, then download it.
Compress other formats
Frequently asked questions
Are my photos uploaded anywhere?
No. The conversion runs entirely in your browser using WebAssembly and the Canvas API. Your images are never sent over the network, never touch a server, and are dropped from memory as soon as you close the tab.
How much smaller will the file get?
Typically between 5% and 30%. This is lossless re-packing rather than quality reduction, so the savings are more modest than a lossy format would give — but not one pixel changes. If you need a dramatic reduction, convert to WebP or JPG instead.
Does compressing lose quality?
No. PNG compression is completely lossless: the pixels in the result are identical to the pixels you put in. All that changes is how efficiently they are packed, which is why the savings are real but modest.
Is there a limit or a cost?
It is free and there is no account. The only limits are practical: 30 files at a time and 60 MB per file, so that the tab does not run out of memory on a phone.
Can I convert several files at once?
Yes — drop in up to 30 files and they are processed one after another, then downloaded individually or as a single ZIP.
Does it work on a phone?
Yes, on iOS and Android. Large batches are slower on a phone because the decoding happens on the device, so stick to smaller groups if things feel sluggish.
PNG — Portable Network Graphics
PNG is lossless: what goes in comes back out pixel for pixel, no matter how many times you re-save it. Add a full alpha channel and you have the natural home for logos, screenshots, diagrams and anything with hard edges or text. The cost is weight — a photograph stored as PNG can be five times heavier than the same photo as JPG.
Other conversions
Same tool, different formats.