TimeStretch
TimeStretch Player lets users loop audio sections and change their speed or pitch directly in the browser.
About TimeStretch
TimeStretch Player is a web audio player by Jonas Wagner. Users open an audio file in the browser, see its waveform, and loop a section while changing its playback speed or pitch. The stretch control slows or speeds playback without changing pitch. Pitch is adjusted in semitone steps, with a finer tune control in cents. The homepage describes the player as free.
The player needs a modern browser that supports Web Audio. The developer recommends Google Chrome or Firefox and says Internet Explorer is not supported. Supported file types depend on the browser. MP3 and OGG generally work, while FLAC is generally unsupported. On Android, a separate app must provide the file. Playback may stutter when the page runs in the background, because browsers throttle background tabs. According to the developer, songs are not uploaded to a server and stay on the user's computer.
Key features
- Loop a selected region using draggable handles or [ and ] buttons
- Change playback speed without changing pitch using the stretch control
- Pitch shift in semitone steps, with fine tuning in cents
- Mid/Side, Left/Right and Balance controls for stereo adjustment
- Save the processed track as MP3 or WAV
- Remember settings for each file, with an option to turn this off
Best for: Musicians practicing or transcribing songs who need to loop passages and change speed or pitch in a web browser.
Good for
- Runs in a web browser and can be used offline, according to the homepage
- According to the developer, audio files stay on the user's computer rather than being uploaded
- Keyboard shortcuts are available for play/pause, loop control and rewind
Watch out for
- Requires a modern browser with Web Audio; Internet Explorer is not supported
- Supported file types depend on the browser, and FLAC is generally unsupported
- Playback may stutter in background tabs because browsers throttle background pages
TimeStretch at a glance
- Website
- 29a.ch/timestretch
- Category
- Software & Utilities › Media Players & Servers
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Android, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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TimeStretch FAQ
What file types are supported?
It depends on the browser. MP3 generally works in most browsers. MP4 and OGG support depends on the browser, and FLAC is generally unsupported.
Are my songs uploaded to a server?
According to the developer, no. The developer states that all songs stay on the user's computer.
Can I download the processed audio?
Yes, using the Save menu item in the top bar. Files can be saved as MP3 or WAV.
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