Audio Converter

Audio Converter — Fastest Free Online

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The fastest free audio converter online. Drop a WAV, M4A, FLAC, OGG, AAC, Opus, WMA, or AIFF file and native ffmpeg re-encodes it on our server. We ship MP3 output today (LAME VBR ~190 kbps); WAV, M4A, and OGG output formats are coming next. No signup, no watermark.

  • Native ffmpeg pipeline
  • WAV / M4A / FLAC / OGG / AAC / Opus / AIFF in
  • MP3 out today (WAV / M4A / OGG coming)
  • No watermark, no signup
  • Up to 500 MB

Files are deleted from our server within 24 hours.

Clipy

Still converting files by hand?

4,000+ people record and share with Clipy — free forever, no watermark.

  • Record straight to a shareable MP4
  • Send a link, not a 100 MB attachment
  • Agent-readable links: AI summary, key moments, transcript
  • Free forever — no watermark, no install
Yes, record & share free

No credit card. Viewers never need an account.

Why this tool exists

  • Files upload to the nearest Backblaze B2 POP via presigned URL.
  • Native ffmpeg on the server. No watermark, no signup.
  • Source and output are deleted within 24 hours.
10+ conversions and counting
Trusted by creators at startups, agencies, and Fortune 500 teams.
Free forever — no signup, no watermark.

Why this is fast

Native server ffmpeg with real SIMD, multi-threading, and disk I/O is roughly 4–8x the throughput of browser WebAssembly on the same job. Uploads land at the nearest Backblaze B2 point of presence via a presigned URL, so a viewer in São Paulo is not pushing bytes to US-east, and the finished MP3 is delivered through Bunny CDN from the same edge. Even a multi-hour FLAC archive usually finishes inside the time the upload took.

What this tool does, exactly

We run ffmpeg -i input -vn -c:a libmp3lame -q:a 2 -f mp3 output.mp3 on the server. -vn drops any video stream (some inputs carry album art), the LAME encoder re-encodes at VBR quality 2 (~190 kbps average), and the output is a standard MP3 every player understands. The accepted MIME list covers MP3, MP4/M4A, AAC, WAV/WAVE, OGG, FLAC, Opus, WMA, AIFF, and even webm-container audio — if ffmpeg can decode it, this tool accepts it.

MP3 today, WAV/M4A/OGG coming — the honest status

The V1 server pipeline pins one output container per tool slug, and audio-converter currently ships MP3. The fix — per-options output containers in the spec layer — is on the roadmap and will land alongside a format picker right above the convert button. Until then, the page is effectively a more permissive MP3 converter that accepts a wider range of inputs than MP3 converter. If you specifically need MP3 right now, both pages produce the same byte-for-byte output.

Sister tools

Specifically converting an Apple file? M4A to MP3 converter. Pulling audio out of a video? Video to audio converter and MP4 to MP3 converter. Trim the MP3 down? MP3 cutter. Make it smaller for email or Discord? Compress audio. Clean up hiss and fan noise? Remove background noise.

Common questions

What audio formats does Clipy support today?

On the input side: WAV, M4A, AAC, OGG, Opus, FLAC, WMA, AIFF, and most other common audio containers ffmpeg understands. On the output side we ship MP3 today — WAV, M4A, and OGG output formats are coming next as the spec layer grows per-options output containers. If you specifically need MP3 right now, this tool is ready.

Why does the output have to be MP3 right now?

Honest answer: the V1 server pipeline pins one output container per tool, and the audio-converter slug ships MP3 today. We will add WAV (uncompressed PCM for editing), M4A (Apple-ecosystem AAC), and OGG (open-source Vorbis) as the spec layer grows a per-options container helper. For now, this page is effectively a more permissive MP3 converter — the upside is the encode is fast and the file plays anywhere.

Is anything kept on your servers after the conversion?

No. The source uploads to the nearest Backblaze B2 point of presence via a presigned URL, native ffmpeg runs the encode, the output is delivered through Bunny CDN, and both files are deleted within 24 hours. No signup means there is no user identity to log against in the first place.

Will converting MP3 to MP3 at a different bitrate make it sound better?

No. Converting between two lossy encodings cannot restore detail that was already discarded. If your goal is a smaller file, use the compress-audio tool with a target bitrate. If your goal is a better-sounding file, you need a higher-quality source — transcoding cannot conjure quality.

Why is the WAV file so much bigger when other tools make one?

WAV is uncompressed PCM and stores every sample at full resolution. A 5 MB MP3 can balloon to 50 MB as WAV. That is expected — pick WAV only for editing or mastering, and MP3, M4A, or OGG for sharing.

Is there a file size limit?

Up to 500 MB per file. That covers a multi-hour podcast in MP3 with room to spare, but a huge uncompressed WAV can hit the ceiling. For very large batches, a desktop ffmpeg install handles them natively.

Tool not working the way you expect?

Tell us what broke — we resolve every feedback within 24 hours.

Send feedback →

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