Compress PNG Online

35% – 70% Savings

Quantized 256-color palette reduction via UPNG and Deflate recompression. Files are processed 100% in your browser memory and never leave your device.

Compression Preset:
Select or drag files

Select or drop files here

100% private in-browser conversion - files never leave your device

or paste Ctrl+V

How In-Browser PNG Compression Works

File2File executes local compression algorithms in browser memory using WebAssembly and HTML5 APIs:

  • Converts 24-bit/32-bit truecolor to highly optimized 8-bit indexed palette.
  • Retains full alpha transparency channels.
  • Strips non-essential ancillary metadata chunks (tEXt, zTXt, iTXt).

Zero-Knowledge Privacy Guarantee

Unlike traditional online compression websites that upload your confidential files to remote cloud servers, File2File runs 100% client-side.

Zero-Network-Transmission Privacy Guarantee: 0 bytes uploaded to external servers. All processing occurred locally in your browser sandbox.

Your browser downloads our compiled WebAssembly binary once, and all byte operations run directly within your local hardware RAM. No tracking, no logs, no copies saved.

View PNG Technical Specifications & Magic Bytes →

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