M4A в WAV
Длительность-
Частота-
Каналы-
Размер WAV-
Конвертация выполняется через Web Audio API. Поддержка исходного формата зависит от браузера.
Tool guide
Voice memos from an iPhone and most Android recorders land as M4A files carrying AAC audio, while editors and game engines often expect plain PCM. This converter decodes the M4A with your browser's own audio engine and hands back a WAV at the original sample rate, all on your own machine. It is the quickest fix when an interview recorded on a phone has to go onto a timeline that refuses to import M4A.
Copy the .m4a off the phone, open this page, choose the file in the M4A field and press the convert button. The decoding happens in the browser, so there is no install step and the finished WAV arrives as an ordinary download. The same flow works directly on the phone if you open the page in a mobile browser.
AAC inside an M4A keeps roughly a tenth of the original data. WAV stores raw PCM instead — two bytes per channel per sample — so a minute of 44.1 kHz stereo costs about 10 MB no matter how quiet the recording is. The size jump is expected, not a sign of a bad conversion.
No. AAC discards spectral detail at record time and nothing can bring it back. The WAV simply stops re-compressing what survived, so any swishing or hiss in the source stays. The point is editor compatibility and avoiding a second lossy pass during editing.
An .m4a container can hold ALAC or store-protected tracks that browsers will not decode. Test whether the file plays in the browser's own player: if it does not, conversion will fail too. Trying another browser, or re-saving the track as ordinary AAC first, usually solves it.
No hard cap is coded in, but the decoded audio has to fit in the tab's memory. Ninety-minute recordings are fine on a typical laptop, while multi-hour lectures on a phone can crash the tab. Split very long files before converting.
Nowhere beyond the tab. The page never sends the file contents to a server; Web Audio does the work on your device, which is why it keeps working offline once loaded. That makes it usable for confidential recordings you would rather not hand to a third-party service.
Before: interview-2026-09-01.m4a — 11 MB, AAC 128 kbps, 44.1 kHz, mono, 12:40
After: interview-2026-09-01.wav — 67 MB, 16-bit PCM, 44.1 kHz, mono, same length
Before: note.m4a — 380 KB, AAC, 48 kHz, stereo
After: note.wav — 4.6 MB, 16-bit PCM, 48 kHz, stereo
Your rating and feedback help decide what to improve next.