Quick answer: To slow down audio, open the file, keep 0.75× (or choose 0.9× or 0.5×) and press Slow it down. With Keep the pitch on, the sound is time-stretched so it stays in the same key; switch it off for the deeper tape-slowdown effect. The result is saved as MP3, M4A or WAV, and nothing is uploaded.
Learn a fast guitar solo, practise a language, or transcribe a fast talker. Slow the recording down while voices and instruments stay in tune.
Slow down audio at a glance
| Price | Free, no sign-up, no watermark, no daily limit |
|---|---|
| Accepts | MP3 · M4A · WAV · FLAC · OGG |
| Largest file | 1 GB per file, several files at once |
| Where it runs | In your browser: files are never uploaded |
| Works on | Any modern browser on iPhone, Android, Windows, Mac and Linux |
| Send the result | Download it, or send it free with a link or by email (up to 20 GB) |
How to use the slow down audio
- Choose the song, lesson or recording.
- Keep 0.75×, or pick 0.9× for a gentle slowdown or 0.5× for half speed.
- Leave Keep the pitch on so it stays in tune.
- Press Slow it down, listen, and download the slower file.
Which speed for what
| Speed | Good for |
|---|---|
| 0.9× | Fast podcasts and lectures, still natural |
| 0.75× | Transcribing, language learning, practising along |
| 0.5× | Working out fast solos and tricky passages note by note |
Any speed from 0.25× to 4× is possible with Other.
Pitch kept or not
With Keep the pitch on, the audio is time-stretched: small slices of sound are repeated and blended so the playback is longer but every note stays at its pitch. The stronger the slowdown, the more you hear a slight echo or smear, especially on drums. With it off, the audio is simply played slower, like a record at the wrong speed: the pitch drops, which some people use for slowed-and-reverb edits.
Faster, and videos
To speed audio up instead, use Change audio speed. For the sound and picture of a video together, use Change video speed or Slow motion video.
How this compares
| This tool | Online converters (e.g. Online Audio Converter, Clideo or CloudConvert) | Desktop apps (e.g. Audacity) | |
|---|---|---|---|
| Your file is uploaded | No | Yes, to their servers | No |
| Install or account | None | Account for some features | Install needed |
| Watermark or daily limits | None | Common on free plans | Depends on the app |
Plans of other services change; check their sites. More audio tools.
Frequently asked questions
How do I slow down a song without changing the pitch?
Open it here, choose a speed below 1× and keep Keep the pitch on. The song plays slower in the same key.
Why does very slow audio sound echoey?
Time-stretching repeats small slices of sound. At 0.5× and below that becomes audible, especially on percussion.
Can I make the slowed version deeper?
Yes. Switch off Keep the pitch and the pitch drops with the speed, like a slowed-down tape.
Is my audio uploaded?
No. It is processed in your browser.
Need to send a big file?
Send files up to 20 GB with a download link or by email. Free, no account needed, original quality.
Send large files free