Is the M4A to WAV converter free?

Yes. Transcodr is free with no accounts, watermarks, or hard limits beyond your device's available memory.

Are my files uploaded to a server?

No. The conversion runs locally via ffmpeg compiled to WebAssembly, so your M4A file never leaves the browser tab.

What quality is the WAV output?

WAV — PCM 16-bit — a lossless result, so no audio quality is lost (files are larger).

How do I convert M4A to WAV?

Drop your M4A file above (or click Browse) — the output is already preset to WAV — then click Convert and download the result.

M4A → WAV · On-device · No upload

Convert M4A to WAV

Convert M4A to WAV in seconds, free and entirely in your browser. M4A is AAC audio in an MP4 container; WAV is uncompressed PCM audio — lossless, but large. Transcodr runs real ffmpeg compiled to WebAssembly, so your file is processed on your own device and never uploaded.

Drop files to convert

Video, audio, images, subtitles: anything ffmpeg can read. Drop them anywhere on the page or browse from disk.

Try a sample:

Session record(0)

No conversions yet

Time	From		To	Size	Δ	Duration
When you convert something, it’ll appear here. Clears on tab close — we don’t keep records.

M4A vs WAV

Property	M4A	WAV
Compression	Lossy (AAC)	Uncompressed PCM
Fidelity	Efficient	Lossless
File size	Small	Large

M4A → WAV questions

Is the M4A to WAV converter free?: Yes. Transcodr is free with no accounts, watermarks, or hard limits beyond your device's available memory.
Are my files uploaded to a server?: No. The conversion runs locally via ffmpeg compiled to WebAssembly, so your M4A file never leaves the browser tab.
What quality is the WAV output?: WAV — PCM 16-bit — a lossless result, so no audio quality is lost (files are larger).
How do I convert M4A to WAV?: Drop your M4A file above (or click Browse) — the output is already preset to WAV — then click Convert and download the result.

01 / Engine

Real ffmpeg, compiled to WebAssembly.

Same library Netflix, YouTube, and basically every command-line video tool relies on, running in a Web Worker. Pipe a file in, run a command, pipe bytes back out.

02 / Privacy

Nothing leaves the tab.

No uploads, no accounts, no telemetry beyond an anonymous pageview. We couldn’t see your files if we wanted to — there’s no server in the loop.

03 / Limits

It is, after all, a tab.

Files up to a few hundred megabytes convert comfortably. Beyond that, your browser starts asking pointed questions. Use the desktop ffmpeg for 4K masters.

Privacy Terms Status