Keep your transparent backgrounds intact. Optimize PNG images without sending them anywhere.
Drop your images here, or choose them below.
PNG · Up to 30 MB eachYour images never leave this browser.
Choose a photo or add a batch. Everything stays on your device.
Adjust quality or pick a size limit. We’ll take care of the compression.
Check the result and download. One at a time, or all in a ZIP.
PNG is lossless, so browsers do not use the quality slider when encoding it. At original dimensions, this tool redraws and re-encodes the pixels, removing source metadata. That can reduce some files, but an already optimized or indexed-color PNG can be smaller than the browser’s output. We keep the original in that case.
Logos, cutouts, and interface graphics often depend on an alpha channel. PNG output preserves transparent and semitransparent pixels rather than adding a white background. The checkerboard in the preview helps you inspect those areas; it is not part of your downloaded image.
A target size can require reducing width and height because changing quality alone cannot shrink PNG. This changes pixel dimensions and may soften text or fine lines. Check the displayed dimensions before using the result. For detailed screenshots, choose a larger limit when you can. Palette quantization is planned for V2.
Suggested workflows. Actual savings depend on your image.
Add the PNG and leave Auto selected to keep its dimensions. Quality adjustments do not change PNG encoding.
Before you download: Inspect the edges against the preview checkerboard. An efficiently indexed logo may be kept as the original because native re-encoding is larger.
Select 500 KB to permit dimension reductions. This can help with large screenshots that cannot shrink enough through lossless re-encoding.
Before you download: Read the smallest text in the preview. If it becomes illegible, use a larger target or crop irrelevant areas in an editor first.
The browser’s PNG encoder is lossless and ignores the quality parameter. Choose a target to allow resizing, or keep the original dimensions for full pixel detail.
Animated PNG files are detected and rejected so frames are not silently removed. This release supports still PNG images only.
Pick a format or start with a size limit.