GIF to APNG Converter - Convert GIF to Animated PNG Locally

Convert animated GIF images to APNG format directly in your browser. 100% local, privacy-first conversion powered by WebAssembly with no server uploads.

Click for theater mode

Drop GIF animation file here

Local browser WebAssembly transcoding. No data is sent to external servers.

Add a GIF file to begin.

Conversion runs securely inside your local browser via WebAssembly. No server uploads.

Converted Preview

Upload a file and click convert to preview and download your animated PNG.

WASM Compiler Logs

Console is idle. Trigger conversion to see logs.

How to Use

  1. Upload GIF: Drag and drop your `.gif` file or click the button to browse.
  2. Start Transcoding: Click the Convert button to execute the in-browser WASM compiler.
  3. Save APNG: Download the compiled animated PNG (.apng) file instantly.

Core Features

  • 100% Private & Offline: All graphics are processed locally on your computer inside WebAssembly sandbox. Files never touch the cloud.
  • Strict Format Compliance: Encodes fully compliant APNG files matching modern browser standards (acTL, fcTL, fdAT).
  • Sub-Second Processing: Bypasses network bottleneck queues. Demuxes and packages frames locally in seconds.
  • Free with No Caps: No size limits, length constraints, or subscription gates.

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Calculation Logic

Animated PNG (APNG) is an extension of the Portable Network Graphics format, supporting full 24-bit RGB colors and 8-bit alpha transparency.

Our application loads a lightweight WebAssembly binary of FFmpeg. When you input a GIF, the engine parses the raw frames, copies the frame delay data, and repackages them into the APNG container format locally in browser memory.

FAQ

Does converting to APNG increase image quality?

No. Transcoding cannot restore colors or details that were lost during the original 256-color GIF encoding. However, it prevents further compression losses.

Will my transparent background be preserved?

Yes. The transparency track from the source GIF will be fully mapped and preserved in the output APNG.

Are my files processed online?

No. The converter runs entirely on your local machine using browser virtual environments.