GIF to APNG Converter โ€“ Animated PNG in Browser

Convert a GIF to animated PNG (APNG) with FFmpeg WebAssembly. The input stays in browser memory; the conversion engine downloads on first use.

Click for theater mode

Drop GIF animation file here

The GIF is processed in browser memory. FFmpeg WebAssembly downloads on first use.

Add a GIF file to begin.

Input processing runs in your browser; the conversion engine is downloaded on first use.

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: Preview and download the generated animated PNG file.

Core Features

  • GIF to animated PNG: Accepts one .gif file and creates an APNG byte stream for preview and download.
  • Browser-memory processing: The input file is read by FFmpeg WebAssembly in your browser instead of being uploaded for server-side conversion.
  • Source-aware output: APNG supports richer color and alpha data, but conversion cannot restore colors or detail missing from the original GIF.
  • Device-dependent capacity: Large or long animations use more browser memory and CPU. The first run also downloads the FFmpeg WebAssembly core.

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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.

On first use, the application downloads the FFmpeg WebAssembly core. It then runs ffmpeg -i input.gif -f apng output.png in browser memory and exposes the resulting byte stream as an APNG download. Processing time depends on frame count, dimensions, and available device 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?

FFmpeg carries supported source transparency into the APNG output, but the result depends on how transparency is represented in the original GIF. Preview the output before relying on it in production.

Are my files processed online?

The selected GIF is processed in browser memory. An internet connection is still needed to load the page and download the FFmpeg engine on first use.