FileFix

Repair a corrupted AAC file that won't open.

Upload an AAC file that won't open or play. AAC is accepted for analysis; if the current repair engine cannot rebuild it, we tell you before checkout and you pay nothing.

Drop a broken audio file here — the free preview shows what's recoverable before you pay.

M4A, WAV, MP3, AAC, FLAC, OGG, OPUS, AIFF

Files up to 2 GB.

Free preview — pay only if you download ($8 USD)

Your files auto-delete — delete them sooner anytime

No person looks at your file as part of repair

Uploading your file.

Keep this tab open while the file transfers. Large files can take longer.

Starting upload...

Recovering what we can.

  1. Upload received
  2. Repair in progress
  3. Result ready

Analyzing your file...

Here's what we recovered.

Review the watermarked preview before checkout. It is up to 12 seconds sampled from the start, middle and end of your recording.

Repair your file

Choose a supported file to see what can be repaired before checkout.

You preview before you pay. If the download is materially worse than the preview you approved, we'll refund you.

Your files auto-delete — delete them sooner anytime

No person looks at your file as part of repair

Try another file

Good news — your file isn't damaged. No charge.

There's nothing to repair. If it still looks broken, the issue may be the player, codec, or viewer on your device rather than the file itself.

We couldn't recover this one.

The file is too damaged to rebuild, so there is nothing to preview and no charge.

Unrepaired files are kept encrypted for up to 30 days, then deleted.

FileFix can't fix that kind of file yet.

Right now we repair video, audio, document, and image files (MP4, MOV, M4V, MKV, AVI, TS, MTS, M2TS, MPG, MPEG, VOB, 3GP, WebM, FLV, M4A, WAV, MP3, AAC, FLAC, OGG, OPUS, AIFF, XLSX, DOCX, PPTX, ODT, ZIP, RAR, PDF, AI, HEIC, and HEIF). We're adding support for more formats over time.

We store just your email and the file type — never the file itself. One message, when it's ready. No spam.

Something went wrong.

The request could not be completed.

Why AAC files stop opening

AAC is the audio codec behind most streamed and recorded sound — it shows up as raw .aac streams and inside .m4a containers. Most "corrupted AAC" problems are damage to the framing or container structure the decoder needs to line up the audio, not to the sound itself. That structure breaks after an interrupted transfer, a truncated download, or an app that stopped writing early.

FileFix accepts AAC files and analyzes what is recoverable, but the current repair engine does not yet rebuild every AAC failure mode. If it cannot produce a playable result, you see that before checkout and pay nothing.

It also cannot recover audio that was never recorded.

Upload your audio file

What we can and can't fix

What happens when you upload

  • AAC files are accepted for analysis, with the result shown before checkout.

We can't fix

  • The current engine may decline an AAC it cannot honestly rebuild.
  • Audio that was never recorded, or frames whose sound data is missing.
  • Empty files, deleted files, or DRM-protected tracks. More →

How it works

  1. Upload Drop a supported audio file in. It uploads over an encrypted connection. The repair runs automatically — no person listens to your file.
  2. Free watermarked preview You hear a free watermarked preview clip and see exactly how much we recovered.
  3. Pay & download If it's right, you pay $8 USD once and download a clean, full-quality audio file.

About half of real-world corrupted files repair fully; you preview before you pay.

See what's recoverable.

Free preview · pay only if it worked · private & auto-deleted

Upload your audio file

Repair guides

Questions