Will my transparency be preserved?

Yes — the output stays PNG, so transparent backgrounds are kept intact. That's the main reason to compress as PNG rather than convert to JPG.

Why are PNGs so large?

PNG stores every pixel losslessly, which is great for sharp graphics but heavy for detailed images. Compressing trims the size while keeping the format's strengths.

Why does my PNG get smaller in pixels instead of just lighter?

PNG is lossless, so there is no quality setting to trade away. To reach a size target the tool has to reduce the pixel dimensions, which is why a tightly compressed PNG comes back narrower rather than blurrier.

Can I compress a PNG without changing its dimensions?

Only if the target is large enough to fit the original dimensions. Raise the target until the dimensions are left alone, or convert to WebP, which keeps transparency and typically needs far fewer bytes for the same size.

Compress PNG Online — Free & Private

Reduce PNG file size in your browser while keeping transparency — no upload, no watermark.

Target size

Drop an image here or click to choose

processed on your device — never uploaded

PNG is the format of screenshots, interface mock-ups, logos and anything with a transparent background, and it is the format that most often blows past an upload limit. A full-screen capture on a modern laptop can be 3 to 5 MB. This page keeps the output as PNG and sets a 200 KB target by default, so transparency, sharp text edges and flat colours survive instead of being flattened onto a white JPG.

Because PNG compression is lossless, there is no quality slider to lower the way there is for a JPG. When a PNG must shrink substantially, the lever the tool has is pixel dimensions: it reduces them step by step until the file fits. For a screenshot meant for a bug report or a chat message that is usually fine, since nobody needs it at full retina size.

The trade-off, then, is that a PNG hitting a tight target comes back smaller in width and height rather than blurrier. If the content is a photograph rather than a graphic, PNG is the wrong container; convert it to WebP, which keeps transparency at a fraction of the size, or to JPG if there is no transparency to protect. For screenshots that must stay legible, raise the target to 400 or 500 KB and the dimension loss is smaller.

More sizes & options

Frequently asked questions

Will my transparency be preserved?: Yes — the output stays PNG, so transparent backgrounds are kept intact. That's the main reason to compress as PNG rather than convert to JPG.
Why are PNGs so large?: PNG stores every pixel losslessly, which is great for sharp graphics but heavy for detailed images. Compressing trims the size while keeping the format's strengths.
Why does my PNG get smaller in pixels instead of just lighter?: PNG is lossless, so there is no quality setting to trade away. To reach a size target the tool has to reduce the pixel dimensions, which is why a tightly compressed PNG comes back narrower rather than blurrier.
Can I compress a PNG without changing its dimensions?: Only if the target is large enough to fit the original dimensions. Raise the target until the dimensions are left alone, or convert to WebP, which keeps transparency and typically needs far fewer bytes for the same size.

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🔒 Your files are processed on your device. This tool runs entirely in your browser — nothing is uploaded.