Free online tool

Compress PNG Images Online — Free

PNG files are often much larger than they need to be. PuffPix reduces PNG file sizes up to 80% using advanced compression — preserving sharp edges, text, and full transparency without any visible quality loss.

Open PuffPix — it's free No sign-up · Files deleted after 30 min · Works in your browser
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Transparency preserved

Alpha channel (transparency) is fully preserved during compression. Your PNG will look identical.

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Lossless & lossy modes

Choose gentle lossless optimization or aggressive lossy compression for the smallest possible file.

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Batch compression

Upload up to 20 PNG files at once. Compress an entire set of UI assets or icons in seconds.

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Files auto-deleted

Your PNGs are processed on a secure server and automatically deleted within 30 minutes.

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Max compression (Pro)

Pro plan uses pngquant for the smallest possible PNGs — up to 70% smaller with near-lossless quality.

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Free, no account needed

Compress PNG files free online — no sign-up, no watermarks, no strings attached.

How to compress PNG images in 3 steps

1

Upload your PNG fileDrag & drop or click to select. Free plan includes 20 compressions per day.

2

Adjust qualityUse the quality slider to balance file size and visual quality. 70–80% removes invisible data.

3

DownloadYour compressed file is ready instantly. Download individually or as a ZIP.

Frequently asked questions

How much can I reduce a PNG file size?
Typically 20–70% depending on the image content. Screenshots and flat illustrations compress the most. Photos saved as PNG compress less but still benefit from optimization.
Will compressing my PNG reduce its quality?
PuffPix uses lossless compression by default, which means zero visible quality loss. The Pro plan adds lossy compression (pngquant) which can reduce file size by 70% with barely perceptible changes.
Does PNG compression preserve transparency?
Yes. PNG transparency (alpha channel) is fully preserved during compression. Your transparent backgrounds, logos, and icons will look identical after compression.
What is the maximum PNG file size I can upload?
Free accounts support up to 5 MB per file. Starter plan allows up to 25 MB, and Pro up to 100 MB per PNG.
Is my PNG file safe to upload?
Yes. Files are uploaded over HTTPS, stored in a private session folder, and automatically deleted within 30 minutes. We never inspect or retain your image content.

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