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Free PNG Compressor Online

Reduce PNG file size in your browser. Transparency is preserved, and nothing is uploaded.

MiniFyPNG is a free online PNG compression tool that shrinks PNG files directly in the browser. Adjust settings when available, compare real byte sizes, and download the optimized PNG.

Output format

PNG

Add a PNG file to compress it here.

What is a PNG compressor?

A PNG compressor reduces the byte size of PNG files, usually by re-encoding them. MiniFyPNG’s free PNG compressor runs in your browser so the image is not uploaded to a MiniFy server for this tool.

How do you compress a PNG with this tool?

  1. 1

    Select a PNG

    Drop a PNG onto the tool or choose a file. Animated PNG is detected and rejected.

  2. 2

    Review the original

    See the file name, dimensions, and exact byte size before anything is processed.

  3. 3

    Compress

    Start compression. Encoding stays on your device using the browser canvas.

  4. 4

    Compare sizes

    Original and compressed sizes are shown as proportional bars with the real savings percentage.

  5. 5

    Download

    Download the compressed PNG, or remove the file and try another.

PNG compressor FAQ

What is a PNG compressor?

A PNG compressor reduces PNG file size. MiniFyPNG does this in your browser so the image is not uploaded to a MiniFy server for this tool.

Does PNG compression reduce quality?

PNG is lossless. Size reduction comes from re-encoding, not from adding JPEG-style quality loss. Results vary by image.

Is transparency preserved?

Yes. This page locks output to PNG so alpha stays intact when the source PNG has transparency.

Are my images uploaded?

No. Compression runs in your browser. Files stay on your device for this tool.

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