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Compression & optimization

Compress PNG Images

PNG is lossless, so simply re-saving it rarely helps. The big win comes from reducing a PNG to a smart palette of up to 256 colors — the same technique popular PNG shrinkers use — which often cuts the size by 60–80% with no visible change for graphics, logos and screenshots.

  • Never uploaded
  • Instant, no sign-up
  • Works offline

Drop images here

Files stay in your browser — nothing is uploaded.

About this tool

Transparency is preserved, and every result also gets a lossless optimisation pass. Lower the color count for even smaller files, or switch to lossless mode for pixel-identical output.

How it works

  1. 1

    Add your PNG files.

  2. 2

    Keep the palette mode, or lower the color count for more savings.

  3. 3

    Compare and download.

Features

  • Palette quantisationUp to 256 well-chosen colors, often 3–5× smaller.
  • Transparency keptAlpha channels survive, so cut-outs and icons stay clean.
  • Lossless optionPrefer identical pixels? Switch to lossless (oxipng).
  • Private by designEverything runs on your device. No uploads, no account, no watermark, and EXIF/GPS data is stripped from the result.

Supported formats

Input: JPG, PNG, WebP, GIF (first frame), BMP, SVG, AVIF, plus TIFF/HEIC where your browser can decode them. Output: PNG, JPG or WebP.

Frequently asked questions

Will my PNG look different?

For logos, icons, UI and screenshots, usually not. Photos with smooth gradients may show slight banding — raise the color count or use lossless mode.

How is this different from converting to JPG?

It stays a PNG, so transparency and sharp edges are kept, and it still opens everywhere PNG does.

What's the best format for photos?

For photos, JPG or WebP is usually far smaller than any PNG.

Are my images uploaded to a server?

No. Files are decoded, processed and re-encoded by your browser using the canvas API and Web Workers. Nothing is sent to any server, and there is no account or storage. Closing the tab discards everything.

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