Audio to PCM
Convert AC3, FLAC, M4A, MP3, OGG, OPUS, WAV to PCM online for free
What is PCM audio?
PCM (Pulse-Code Modulation) is raw, uncompressed digital audio — the same sample data stored inside WAV and AIFF files, but without the container header. Because nothing is compressed or re-encoded, PCM preserves the exact waveform, which is what game engines, DSP tools and embedded hardware expect when they need raw samples.
Why convert MP3, WAV or FLAC to PCM?
Many audio pipelines — Unity and Unreal sound import, microcontroller playback, speech-recognition models and DAW sample chains — require headerless PCM at a known sample rate and bit depth. Converting your MP3, WAV, FLAC, OGG, OPUS, M4A or AC3 files to PCM gives you that raw stream, ready to drop straight into those tools.
Convert in your browser, nothing uploaded
This tool runs entirely in your browser using WebAssembly (ffmpeg.wasm). Your audio never leaves your device and nothing is sent to a server, so even large or private recordings stay on your machine. It is free, needs no sign-up and has no limit on the number of files.
Frequently asked questions
How do I convert MP3 to PCM?
Open the Audio to PCM tool, drag in your MP3 file (or click to browse), pick PCM as the output format and click convert. The PCM file is generated in your browser and downloads instantly — no upload, no account needed.
Is the MP3 / WAV to PCM converter free?
Yes. Converting MP3, WAV, FLAC, OGG, OPUS, M4A and AC3 to PCM is completely free, with no watermark, no sign-up and no limit on how many files you convert.
What is the difference between WAV and PCM?
A WAV file is a container that almost always wraps PCM audio together with a short header describing the sample rate, bit depth and channels. “PCM” here means the raw sample data itself, so WAV and PCM hold the same audio — PCM is just the headerless stream.
Does converting to PCM reduce audio quality?
Converting from a lossless source such as WAV or FLAC to PCM is lossless — the samples are identical. If your source is a compressed format like MP3 or OPUS, the PCM output faithfully reproduces that already-compressed audio; it will not add quality back, but it will not degrade it further.
Which formats can I convert to PCM?
You can convert AC3, FLAC, M4A, MP3, OGG, OPUS and WAV files to PCM. You can also choose the sample rate and channel settings to match what your target engine or device expects.
Is my audio uploaded to a server?
No. All processing happens locally in your browser through WebAssembly, so your files stay on your device and are never uploaded. That makes it safe for private recordings and sensitive audio.