Compress PNG without losing transparency

Choose PNG or WebP to keep transparency

Choose PNG output if you need a PNG file. Choose WebP if the destination supports it and you want to compare a smaller alternative. Both outputs preserve transparent areas in this tool. JPG cannot keep transparency: our JPG export places transparent areas on a white background.

Keeping transparency does not mean every colour stays identical. WebP export here uses lossy quality settings, so edges and colours can change even when the transparent background remains. Keep PNG at the original dimensions when retaining the decoded pixels is the priority.

Step by step

1. Open the PNG compressor, select PNG or WebP output and choose your source file.
2. For PNG output, leave dimensions unchanged first. The quality control is disabled because this tool exports PNG losslessly.
3. If the result is still large, resize only if the destination can use fewer pixels. Resizing changes image detail even when the output format is lossless.
4. Try WebP as an alternative when allowed. Start with a higher quality and compare fine lines, small text and semi-transparent shadows.
5. Preview the result and download it. Check it on the actual background where it will be displayed, especially if the logo will appear on a dark page.

Why a PNG may not get smaller

An already optimized PNG may have little room for further reduction. Our browser-based PNG export is not a dedicated palette optimizer. Moving the quality slider cannot make a lossless PNG progressively smaller in this tool.

For the same format and dimensions, the app keeps the original file when its newly encoded result would be larger. You may therefore see no saving. If you resize or change formats, compare the actual output; a different format is not a promise of a smaller file.

Which tradeoff fits your image?

For a logo with sharp lettering, keep PNG and original dimensions first. For a large transparent product photo, compare WebP and inspect its edges. For a screenshot, pay attention to text readability before reducing width.

A newly encoded output does not copy embedded EXIF or XMP metadata, but an unchanged original returned by the tool retains its metadata. Do not treat a no-saving result as a metadata-cleaning operation.