Upload your PNG image, select a compression level (Light, Medium, Strong, or Maximum), or adjust the quality slider manually. Preview the compressed result with file size comparison, then tap Download. Everything happens in your browser — your image is never uploaded to any server.

Yes, at the Light compression level. Re-exporting a PNG through the browser’s canvas engine strips unnecessary metadata (color profiles, text chunks, comments) which can reduce file size by 10–40% with zero visible quality loss. For stronger compression, some quality trade-off is expected but often imperceptible.

It depends on the image. Photographs saved as PNG can often be reduced by 50–80%. Graphics with flat colors and simple shapes compress less since PNG is already efficient with those. Typical results: Light gives 10–30% reduction, Medium 30–50%, Strong 50–70%, Maximum 70%+.

Lossless compression reduces file size by removing metadata and optimizing encoding — no pixels are changed. Lossy compression reduces quality slightly to achieve much smaller files. This tool offers both: Light mode is mostly lossless (metadata removal), while Medium to Maximum modes apply lossy compression for greater size reduction.

Use the Medium or Strong compression level to significantly reduce file size while keeping acceptable visual quality. For web use, most images look great at Medium compression. Also consider whether you actually need PNG — if your image has no transparency, converting to JPG will give you much smaller files.

No. This tool preserves the transparency (alpha channel) in your PNG images. The compressed output retains all transparent areas exactly as in the original.

Open this tool in Safari on your iPhone, upload your PNG image, choose a compression level, and long-press the compressed image to save it. No app installation needed — it works directly in your browser.

Yes. Your images are processed locally in your browser. No files are uploaded to any server, no data is stored, and no one else can access your images. It’s as private as editing on your own device.