Convert audio to MP3 or WAV
Drop up to 10 audio files (MP3, WAV, M4A, OGG, FLAC and more), pick MP3 or WAV, optionally cut a start and end, and download the results, or all of them as one ZIP. Your browser does the work on your device and nothing is uploaded.
Drop your audio files here
Up to 10 files, each up to 100 MB: MP3, WAV, M4A, OGG, FLAC and more, as far as your browser can play them. Nothing is uploaded.
The sound is opened at your device's audio rate (usually 44.1 or 48 kHz), so files recorded at other rates are resampled. Tags such as artist and cover art are not copied.
Why convert in the browser
- •Your recordings, voice notes and music never leave your device, so there is no upload wait and nothing to delete afterwards.
- •MP3 plays on every phone, car stereo and editor. WAV is the plain, lossless format that audio software and some devices ask for.
- •Free, no account, no file-size paywall, and several files at once.
What this tool does and does not do
- •Reads what your browser can play. MP3, WAV and M4A/AAC work in all current browsers; OGG and FLAC work in most; some formats (AMR, WMA, and ALAC in some browsers) may not open.
- •Up to 10 files per batch, each up to 100 MB. Long recordings are decoded fully into memory, so an hour of audio can fail on a phone.
- •MP3 output at 64 to 320 kbps, constant bitrate. WAV output is 16-bit. Stereo stays stereo and mono stays mono; files with more than two channels keep the first two.
- •The sound is opened at your device's audio rate (usually 44.1 or 48 kHz), so a file recorded at another rate is resampled. If you need the exact original sample rate, use a desktop tool.
- •Converting a lossy file such as MP3 or M4A to another lossy file always loses a little quality. Converting to WAV keeps what was left, but does not restore it.
- •Tags (artist, title, cover art) are not copied. Trimming cuts the same start and end from every file in the batch.
Other ways to convert audio
- •On a Mac, the Music app can convert songs (File > Convert), and afconvert in Terminal converts many formats.
- •ffmpeg converts almost anything and keeps tags, if you are comfortable with the command line.
Questions
- Is my audio uploaded?
- No. Your browser opens, converts and saves the files itself. The MP3 encoder is a file that downloads once to your browser, like any other part of the page.
- Which MP3 quality should I choose?
- 192 kbps is a good default for music. 128 kbps is fine for speech and small files; 256 or 320 kbps for the highest MP3 quality. Higher means a larger file.
- Why does my file not open?
- This tool can only convert what your browser can play. If the file is damaged, protected by copy protection, or in a format your browser does not know (some voice-recorder and phone formats), it will say so. Another browser sometimes opens it.
- Does converting FLAC or WAV to MP3 lose quality?
- Yes, MP3 is lossy: some detail is thrown away to make the file small. At 192 kbps or above most people cannot hear the difference. Keep your original lossless file if quality matters.
- Why is my WAV so big?
- WAV stores every sample uncompressed. Stereo at 44.1 kHz is about 10 MB per minute. Choose MP3 if size matters.
- Can I convert audio to M4A, OGG or FLAC?
- Not yet. This page writes MP3 and WAV, which cover most needs.
- Does it keep the song's title and cover art?
- No. Only the sound is converted; tags are not copied.
- How do I cut part of a recording?
- Type a start and end in seconds (like 90) or minutes and seconds (like 1:30). Leave the end blank to go to the end. The cut is applied to every file in the list.
How it works
Your browser decodes the file with its built-in audio decoder. MP3 files are made by lamejs, an open-source MP3 encoder (LGPL-3.0), loaded as a separate file that you can inspect or replace. It runs in small steps so the page stays responsive, and nothing is sent out. Third-party notices