Convert an Audio File
Pick an audio file and a target format — it's converted in your browser, nothing is uploaded.
Convert audio in your browser
Pick an audio file and a target format — mp3, wav, ogg, flac or m4a. The conversion runs entirely in your browser with ffmpeg compiled to WebAssembly, so your audio is never uploaded to a server. Anything ffmpeg can decode works as input: mp3, wav, flac, m4a/aac, ogg, opus and more.
Worked example
Turn a voice memo into a small shareable file: upload memo.wav, set Target
format to mp3 and leave Bitrate at 192 — the result is memo.mp3 at
192 kbps, a fraction of the WAV's size. Going the other way (mp3 → wav)
gives you an uncompressed file that any editor can open, though it can't
restore quality the mp3 encoding already discarded.
Formats
- MP3 — lossy; small and playable everywhere. Bitrate 32–320 kbps.
- WAV — lossless 16-bit PCM; largest, ideal for editing. No bitrate.
- OGG — lossy Vorbis; open format, good quality per byte. Bitrate applies.
- FLAC — lossless and compressed; smaller than WAV, still a perfect copy.
- M4A — lossy AAC in an mp4 container; good quality at small sizes.
Limits and edge cases
- Input files up to 10 MiB.
- Bitrate only applies to the lossy targets (mp3, ogg, m4a); wav and flac are lossless and ignore it. Values outside 32–320 kbps are clamped.
- Converting lossy → lossless (e.g. mp3 → flac) produces a bigger file but cannot restore quality the lossy encoding already removed.
- Embedded album art is dropped: cover images ride along as a video stream, which audio-only formats like wav can't carry.
- The output keeps the original filename with the new extension
(
song.mp3→song.wav).
FAQ
Which format should I pick?
mp3 for maximum compatibility, m4a for small high-quality files on Apple
devices, ogg for open-source pipelines, and wav or flac when you need a
lossless copy for editing or archiving.
Does converting mp3 to flac or wav improve the quality?
No. Lossless targets preserve exactly what's in the source — quality the mp3 encoder already discarded is gone for good. Convert to flac/wav when a tool needs that container, not to "upgrade" audio.
What bitrate should I use for mp3?
192 kbps (the default) is transparent for most listeners and music. Use 128 kbps for voice recordings where size matters, and 256–320 kbps for archiving music you care about.
Is my audio uploaded anywhere?
No. The page downloads an ffmpeg WebAssembly build once and then processes your file locally in the browser tab — the audio never leaves your device.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool audio-convert 'url=https://example.com/input' 'format=mp3' 'bitrate=192'New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/audio-convert/?url=https://example.com/input&format=mp3&bitrate=192