SWF Audio Extractor

How to use

Drop in a Flash .swf file. Every sound inside it is listed — background music, voice clips, button beeps, the lot — each with its own player so you can hear which is which before you save anything. Grab one, or take the whole set as a ZIP.

Original quality is the default and is usually what you want. Flash stored most audio as MP3 already, so this hands that MP3 straight back to you without re-encoding it — the file you save is bit-for-bit what was inside the SWF. Pick MP3 or WAV instead only if you need everything in one format.

Private by design

The SWF is read entirely in your browser. Nothing is uploaded, nothing hits a server, and nothing is stored — which matters more than usual here, because the Flash files people still have are usually ones they cannot re-download from anywhere.

What's inside a SWF

Flash could store audio four different ways, and this tool reads all four:

• MP3 — the export default, so it's what most files use. Extracted without re-encoding.
• ADPCM — Flash's own compression, common for short sound effects and older files. Decoded to WAV.
• Raw PCM, 8-bit or 16-bit — uncompressed. Wrapped as WAV.
• Nellymoser and Speex — used for microphone recordings made through Flash Media Server. These are listed but can't be decoded here; they practically never appear in a .swf saved to disk.

Sounds come in two shapes: individual clips triggered by the animation, and one long timeline stream sliced across the movie's frames — usually the background music. Both are reassembled.

Notes

• Compressed SWFs are handled. The rare LZMA kind (files starting ZWS, Flash 13 and later) is not, and says so rather than failing quietly.
• A SWF with no audio in it will say so. Plenty of Flash files are pure vector animation.
• Flash reached end of life in 2020 and Adobe published the SWF format openly, so this reads a documented file format on a file you already have. Nothing is downloaded from anywhere.