Which audio formats can I convert to?

You can export MP3, M4A (AAC), M4R (iPhone ringtone), FLAC, WAV, OGG (Vorbis), OPUS, AIFF, WMA, and CAF, depending on what you select in the output menu.

Will converting MP3 to FLAC improve quality?

No. Lossy formats like MP3 discard information permanently. Converting to FLAC or WAV only changes the container and file size—it cannot restore detail that was removed.

What is the upload limit and how long are files kept?

Uploads can be up to 100MB. Files are removed from the server after about 15 minutes; download your converted file promptly.

Convert Audio Format

Upload an audio file and choose the output format. Supports MP3, WAV, M4A (AAC), OGG, FLAC, OPUS, AIFF, WMA, CAF. Free, no sign-up. Files auto-deleted after 15 minutes.

Drop your audio file here

or click to browse

MP3, WAV, M4A, OGG, FLAC, OPUS, AIFF, WMA, AMR, CAF • Max 100MB

Output format

Your file is ready

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This tool is for files you own or have permission to use.

Convert audio format online: guide to MP3, WAV, M4A, FLAC & more

Use this page when you already have an audio file and need a different format—for example WAV for a DAW, MP3 for sharing, FLAC for archiving, or M4R for an iPhone ringtone. Upload once, pick the output, download the result.

What this tool does

Format conversion changes how your audio is encoded and wrapped (codec + container). It is not the same as mastering or repairing bad recordings: if the source is noisy or low bitrate, a new format will not fix that. It will make the file compatible with the app or device you target.

If you need to edit tags or cover art and end up with MP3, use the main MP3 Toolbox editor. If you mainly want to tweak bitrate or sample rate without changing the “family” of format, try Change Audio Quality.

Supported inputs

You can upload common types including MP3, WAV, M4A, OGG, FLAC, OPUS, AIFF, WMA, AMR, and CAF (see the uploader on this page). Maximum size is 100MB. After processing, files are deleted automatically in about 15 minutes—download right away. Read Privacy and Terms for how we handle data.

Output formats and when to use them

MP3 — Universal playback: phones, cars, old players, and the web. Lossy and small; ideal for sharing and libraries where compatibility matters most.
M4A (AAC) — Common on Apple devices and many streaming workflows. Lossy; often efficient quality per megabyte.
M4R — iPhone ringtone container. Use when you need a short clip in Apple’s expected format (trim length in an editor first if needed).
FLAC — Lossless compression. Best for archives and hi-fi listening when you want an exact copy of the decoded PCM (smaller than WAV, still full quality).
WAV — Uncompressed PCM; large files but maximum compatibility with DAWs, video editors, and broadcast tools.
OGG (Vorbis) — Open lossy option; useful for games, Linux-friendly stacks, and some web projects.
OPUS — Modern lossy codec, strong for voice and music at low bitrates; great for webRTC-style use cases when your player supports it.
AIFF — Uncompressed (or PCM) on Apple-heavy workflows; similar role to WAV in many cases.
WMA — Legacy Windows Media contexts; verify your player still supports it before relying on it long term.
CAF — Apple Core Audio Format; handy for certain macOS / iOS production pipelines.

Lossy vs lossless (important)

Lossy formats (MP3, AAC, Vorbis, Opus at typical settings) throw away information to save space. Lossless (FLAC, uncompressed WAV/AIFF) preserves the audio exactly as decoded from the source file you upload.

Converting MP3 → FLAC or MP3 → WAV does not restore lost quality—it only repackages what is already there, often into a much larger file. Always keep a lossless master if you plan to re-export many times.

How to convert (quick steps)

Drag your file onto the upload area or click to browse.
Choose the output format from the dropdown.
Click Convert and wait until the status shows completion.
Download before the automatic cleanup window.

Technical details of validation and server-side processing are summarized in How it works. A wider list of extensions and typical use cases is on the formats page.

Frequently asked questions

Can I convert video to audio here?

This page expects an audio file. To extract MP3 from MP4, MKV, MOV, and similar video files, use the home converter or read convert video to MP3.

Do I need an account?

No. Conversion runs in the browser flow without sign-up.

Can I batch-convert many files at once?

This interface is designed for one file at a time. For large batches, desktop tools or scripts may be more efficient.

Read the full blog guide for online format conversion →