Compress PNG Online
Make PNG files smaller in your browser by reducing dimensions, or switch photographs to JPEG for real savings. Sizes are compared honestly before you download anything.
PNG files are big for a good reason
PNG stores every pixel losslessly and keeps full transparency, which is exactly right for logos, screenshots and interface graphics — and exactly why a PNG photograph can weigh ten times its JPEG equivalent. The image compressor on this page gives you the two levers that actually work on PNG: reduce the pixel dimensions, or, for photographs, export as JPEG instead. It shows the byte comparison for every file, including the honest cases where a re-encode did not help.
Keep transparency, lose the weight
Staying with PNG output preserves the alpha channel, and trimming an oversized screenshot or asset to the width it will actually be displayed at often halves the file. Switching to JPEG discards transparency but unlocks quality-based compression; the companion page compress JPG covers that workflow in depth. Chasing a hard limit from an upload form? Compress image to 200KB explains how to iterate quality and width until you are under the ceiling.
Nothing leaves your device
Screenshots and design assets often contain unreleased work. Here they are decoded and re-encoded locally in your browser, never uploaded.
Frequently asked questions
Why is PNG compression different from JPG?
PNG is lossless and has no quality setting in this tool, so re-saving a PNG alone rarely shrinks it. Real savings come from reducing dimensions, or from switching a photograph to JPEG, which compresses far more aggressively.
Will my PNG keep its transparent background?
Yes, as long as you keep PNG as the output format — transparency is preserved. If you switch the output to JPEG, transparent areas cannot stay transparent, because JPEG has no alpha channel.
When should a PNG become a JPEG instead?
When it is a photograph or a complex image without transparency. Photographic content in PNG is usually several times larger than the same image as a good-quality JPEG, with no visible benefit.
The result came out larger. Is something broken?
No — the tool reports that honestly. A small, already-efficient PNG can grow when re-encoded at bigger settings. Lower the maximum width or switch format and run it again.
Are the original PNG files modified?
Never. Originals stay untouched on your device, every download is a separate new file, and nothing is uploaded at any point.
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