Compress PNG

Shrink PNG files by 60–80% while keeping transparency and crisp edges. Free, no watermark, no signup.

Drop in your PNG files.
Pick a compression strength (or leave it on Balanced).
Download the smaller PNGs.

PNG is a lossless format, which is why screenshots and logos look perfect in it — and also why the files get so large. compresspng.net shrinks them two ways. Lossless re-packs the file without touching a single pixel. The lossy settings reduce the colour palette instead, which is how a 2 MB screenshot becomes 300 KB while still looking identical on screen.

Transparency survives every setting. Drop in one PNG or a hundred; they come back ready to download.

Lossless or lossy — which should you pick?

Lossless keeps every pixel exactly as it was, so it is the honest answer to "compress a PNG without losing quality". The trade-off is modest savings: usually 5–15%, and sometimes nothing at all if the file was already well packed.

Balanced and Strong reduce the number of distinct colours in the image. On screenshots, logos, icons, diagrams and UI mockups — anything with flat areas of colour — the result is visually indistinguishable while the file drops by 60–80%. On photographs saved as PNG you may see faint banding in smooth gradients; those are better served by converting to JPEG.

Why your PNG is so big in the first place

PNG compression works by predicting each pixel from its neighbours and storing only the difference. That is brilliant for flat colour and sharp edges, and poor for photographic noise, where almost every pixel differs from its neighbour. A 12-megapixel photo saved as PNG can easily be 20 MB — roughly ten times the same photo as a JPEG — because there is no repetition for the algorithm to exploit.

That is the single most useful thing to know: the format, not the compressor, is usually the reason a file is huge. Photographs belong in JPEG or WebP; PNG earns its keep on graphics and anything that needs transparency.

Guides about Compress PNG

Formats and file size Does PNG Compress? How PNG Compression Works Lossless by design, huge for photos, tiny for flat graphics. 5 min read Formats and file size How Much Can a PNG Actually Compress? Real PNG compression percentages by image type, with hard numbers and the one thing that determines them. 5 min read PNG compression how-to How to Compress a PNG Two levers shrink a PNG: lossless optimisation or palette reduction. Pick the right one. 7 min read PNG compression how-to How to Compress Multiple PNG Files at Once Stop opening every PNG by hand. Batch them, keep the originals safe, and get consistent results every time. 7 min read PNG for the web How to Compress PNG Images for the Web Four ordered steps to shrink PNGs: dimensions, format, compression, delivery. 6 min read Quality and transparency PNG Transparency and Compression Transparency survives PNG compression untouched. The real threat is palette reduction. 5 min read

More compresspng.net tools

Compress PNG to a target size Need it under 100 KB? Pick the ceiling and the compressor works down to it automatically. Lossless PNG optimiser Strip the waste, keep every single pixel. The safe option when the image must not change at all. PNG to JPG For photographs, changing format beats any amount of PNG compression — often by 10×. Resize PNG Cap the longest edge at 1920px. The fastest way to cut size when the image is simply bigger than it needs to be.

Frequently asked questions

How do I compress a PNG?

Drop the file onto the box above and download the result. If you want to control the trade-off, pick a strength first: Lossless keeps every pixel, Balanced reduces the palette to 128 colours, and Strong goes down to 64.

How much can a PNG compress?

It depends entirely on the image. Screenshots, logos and flat graphics commonly drop 60–80%. Photographs saved as PNG usually manage 40–70% with palette reduction, but convert far smaller as JPEG. A PNG that has already been optimised may not shrink at all — in that case the original is returned untouched rather than a larger file.

Can I compress a PNG without losing quality?

Yes — choose Lossless. Every pixel and the full alpha channel are preserved exactly; only redundant encoding data is stripped. Expect a smaller saving than the lossy modes, typically 5–15%.

Does compression remove transparency?

No. Transparency is preserved at every strength, including the lossy ones, because the palette is built with the alpha channel included.

Is there a file size or batch limit?

You can upload multiple PNGs at once and they come back together. Very large uploads are capped for everyone's benefit, but ordinary screenshots and graphics are nowhere near the limit.

Is compresspng.net free?

Yes — free, no watermark, no account, and no email required.