Free tool
Free audio converter. Right in your browser.
Drop an audio file and convert it to MP3 or WAV. Free, no signup, and nothing is uploaded to a server.
A folder of audio files you cannot search is a dead archive. Drop a recording into Almanack and it becomes text you can search, and a memory you can ask.
Turn audio into searchable textConversion happens on your device. Nothing is uploaded.
Why people convert here
Converts in your browser
The file is decoded and re-encoded locally, so there is no upload and no waiting on a server.
MP3 or WAV
Pick MP3 at a quality from 128 to 320 kbps, or lossless WAV.
Private by design
Your audio never leaves your device. Nothing is uploaded anywhere.
No signup, no watermark
Free, with no account and no cap on how many files you convert.
Reads common formats
M4A, WAV, OGG, MP3, and whatever else your browser can decode.
Then make it searchable
A recording is a dead file until you can search it. Almanack turns it into memory you can ask.
FAQ
Audio converter, answered
How do I convert audio to MP3?
Drop your audio file here, choose MP3 and a quality, then click convert. The file is decoded and re-encoded in your browser, and you download the result. Nothing is uploaded.
What formats can I convert?
Any format your browser can read, which includes MP3, M4A, WAV, and OGG, converted to MP3 or WAV.
Is it really free and private?
Yes. There is no signup, and the conversion runs entirely on your device, so your audio never leaves your browser.
Can I turn the audio into text?
Yes. Drop a recording into Almanack and it transcribes what was said, then lets you ask your recordings a question later.
Is my audio uploaded anywhere?
No. The conversion runs in your browser using your own machine, so the file never leaves your device.
Which formats can I convert from?
Most common audio formats, including m4a, wav, ogg, aac and mp3. If your browser can play it, it can almost certainly convert it.
Will converting reduce the quality?
Converting to MP3 is lossy, so some data is discarded. For speech the difference is usually inaudible. For music, keep the original.
Why is a long file slow?
The work happens on your computer rather than on a server. A long recording on an older machine takes a while, so leave the tab open.
Can I convert several files at once?
Convert them one at a time. Batching in the browser tends to run out of memory on longer recordings.
A free audio converter that runs entirely in your browser. Drop in an m4a, wav, ogg or aac file and convert it to MP3 or WAV without uploading anything to a server. This is the quickest way to open an iPhone voice memo on a Windows machine, shrink a recording before you email it, or prepare uncompressed audio for transcription.
How it works
Three steps, no account
Pick your file
Drop in an m4a, wav, ogg or most other common audio files. Everything happens in your browser.
Choose a format
Convert to MP3 for size and compatibility, or WAV when you need uncompressed audio.
Download the result
Save the converted file straight to your device. Nothing is uploaded to a server.
Common uses
What people use it for
Opening an iPhone voice memo on a PC
Voice memos arrive as m4a, which some Windows software will not touch. MP3 opens anywhere.
Shrinking a file before you send it
An uncompressed recording can be ten times the size of the MP3. Converting is usually the difference between attaching it and not.
Prepping audio for transcription
Converting to WAV gives transcription clean, uncompressed input to work from.
Pro tips
Get more out of it
- MP3 is the safe choice when you need a file to open anywhere. WAV is the right one when quality matters more than size.
- Voice memos from an iPhone arrive as m4a, which is why they will not open in some older desktop software. Converting to MP3 fixes it.
- Converting to a compressed format is one-way. Keep the original file if you might need the quality back.
- Long recordings take longer to convert because the work happens on your machine, not on a server. Leave the tab open.
- If you plan to transcribe the audio afterwards, convert to WAV. Transcription tends to do slightly better on uncompressed input.
- File names travel with you. Rename before you convert and you will find it again in a month.
- Convert on a laptop rather than a phone for long files. The work happens locally, so the machine matters.
- Keep the sample rate the source used. Upsampling adds file size without adding any real quality.
- Check the output plays before you delete the original.
- Mono is fine for speech and roughly halves the size. Keep stereo only when the recording is music.
Related tools
Other free tools you might want
Meeting recording to text
Turn a Zoom, Meet or Teams recording into a clean transcript. Free, no signup.
Open the toolVoice recorder
Record audio in your browser and download it. Nothing uploaded.
Open the toolMarkdown editor
Write markdown with a live preview, then copy, download, or print a PDF.
Open the toolThe app behind the tool
Converting the file is the easy half. Remembering what was in it is the hard half.
Almanack takes the recording, writes out what was said, organizes it without being asked, and keeps it somewhere you can question later.
- Drop in any recording and get a clean, organized note instead of another file in a folder.
- Ask your own recordings a question and get an answer sourced to what you actually said.
- No format wrangling. The app takes what your phone records.
- Every note stays searchable months later, which a converted file on your desktop never is.
Free to start. $96 a year or $14 a month when you want more.
Converting it doesn't make it findable.
A file you cannot search is a dead archive. Drop a recording into Almanack and it becomes searchable text and a memory you can ask.
$96 a year or $14 a month. Cancel anytime.