Convert Audio Format

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Click to upload or drag and drop

Audio files only (Max 10MB)

ℹī¸ How it works:
  • Upload your audio file
  • Select output format and convert
  • Download converted file

Convert Audio to MP3 — or Any Other Format

Most people arrive here wanting MP3, because it is the one format that plays on everything: every phone, every car stereo, every website, every editing program. Upload a WAV, M4A, FLAC, OGG, WMA or AAC file and you will have an MP3 in seconds. The conversion also runs the other way and between any of the formats below, so if you need WAV for an editor or FLAC for archiving, that works too. No sign-up and no watermarks.

How to Convert an Audio File to MP3

  1. Click the upload area above or drag and drop your audio file (up to 10 MB).
  2. Choose the output format — MP3, or WAV, OGG, FLAC or AAC.
  3. Convert and download your new file.

Common Conversions

These are the ones people need most often, and all of them work here:

  • WAV to MP3 – the big one. A WAV is uncompressed, so it is roughly ten times larger than it needs to be for listening. Change WAV to MP3 and a file that would not attach to an email suddenly will.
  • M4A to MP3 – M4A is what an iPhone voice memo and much of the Apple ecosystem produces. It is a fine format, but plenty of older players, car systems and upload forms refuse it, and MP3 fixes that.
  • FLAC to MP3 – FLAC keeps every bit of the original, which is exactly why the files are so large. Convert to MP3 for the copy you actually carry around, and keep the FLAC as your master.
  • OGG to MP3 – OGG is common in games, open-source software and some download sites, and is the format most likely to be met with a blank stare by ordinary consumer hardware.
  • WMA to MP3 – the old Windows Media format, still lurking in ripped CD collections from the 2000s. Almost nothing outside Windows will play it.
  • MP3 to WAV – the reverse, for when an audio editor or a piece of software insists on uncompressed input.

The Five Output Formats

  • MP3 – the most widely supported format there is, and the safe default for music, podcasts and sharing
  • WAV – uncompressed and lossless, large but ideal for editing
  • OGG – an open format with very good compression, popular on the web
  • FLAC – lossless compression, so full quality at roughly half the size of WAV
  • AAC – efficient and modern, used by Apple and by streaming services

You can upload from more formats than you can convert to — including M4A and WMA, which can go in but are not offered as outputs.

When You Might Need This

  • A car stereo, old MP3 player or cheap speaker that only recognises MP3
  • An upload form or website that rejects the format you have
  • A voice memo from a phone that will not open on someone else's computer
  • An audio editor or video program that insists on WAV
  • Shrinking a WAV or FLAC that is too large to send
  • Putting audio on a web page in a format browsers handle well
  • Tidying an old music collection into one consistent format

Frequently Asked Questions

Upload it, choose MP3 as the output format, and download. It works the same whether you are starting from WAV, M4A, FLAC, OGG, WMA or AAC — there is no separate tool per format and nothing to install. The converted file keeps its original name, with the new extension.

Some, yes. MP3 is a lossy format, so coming from a lossless one — WAV or FLAC — means detail is discarded to make the file smaller. For ordinary listening on ordinary equipment, almost nobody notices. Going the other way is the case worth understanding: converting an MP3 to WAV or FLAC gives you a much larger file but does not restore anything, because what was removed is gone for good.

You can produce a file in the original format again, but it will not be the original file. Every lossy conversion throws a little away, and converting repeatedly between lossy formats stacks those losses up. If the source matters, keep it and treat each conversion as a copy made for a particular purpose.

MP3 unless you have a specific reason not to — it is the one thing everything plays. Choose WAV if an editor or program demands uncompressed input, FLAC to archive something at full quality without the bulk of WAV, and OGG or AAC when you want better compression than MP3 and know your target device supports them.

You can upload MP3, WAV, OGG, FLAC, AAC, M4A or WMA. You can convert to MP3, WAV, OGG, FLAC or AAC. The lists differ deliberately: M4A and WMA go in but are not offered as outputs, since anything you would want them for is better served by MP3 or AAC.

Because they keep everything. A WAV stores every sample exactly as recorded, which works out at roughly ten megabytes per minute of stereo audio. FLAC compresses that losslessly to about half. MP3 achieves its size by deciding which parts of the sound you were unlikely to hear anyway and discarding them — a trade that is usually well worth making for anything you simply want to listen to.

This page changes the format and leaves the quality settings alone. Compress Audio is about making a file smaller, with a slider that trades quality for size, and it always returns an MP3. If your problem is “nothing will play this”, you want this page. If it is “this file is too big”, you want that one.

One audio file up to 10 MB. That is the limit most likely to catch you out when converting from WAV, since ten megabytes is only about a minute of uncompressed stereo. For a larger file, Compress Audio will bring it down first.

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