The most common audio format, transcribed in seconds.
Longer than 2 minutes?You get the first 2 minutes here. Kalpa transcribes the rest — free to start on iPhone
Get the app ›
To convert an MP3 to text, drop the file above — no conversion needed. Kalpa detects the language and returns text with timestamps in seconds. The first 2 minutes of any MP3 are free here, with no sign-up. For podcasts, lectures and interviews that run longer, the rest is in the Kalpa app.
Keep it, search it, ask about it laterSave to Kalpa ›
On your computer, phone or a cloud folder.
No conversion needed.
Timestamps included.
A .txt file, or keep it in Kalpa.
MP3 is the format podcasts, shared lectures and old dictaphones all end up in. Turn the ones you keep meaning to revisit into text you can skim, quote and keep.
Show notes and quotes.
Lectures and sermons shared as MP3.
Recorded notes from older recorders.
| Free web tool | Kalpa app | |
|---|---|---|
| Length | First 2 minutes of any recording | The whole recording, no limit |
| Summary, quotes and topics | — | Yes |
| Search everything you saved | — | Ask in chat, jump to the moment |
| Your own recordings | Upload a file | Record on iPhone or Apple Watch, transcribed on device |
| Languages | 25, detected automatically | 25, detected automatically |
MP3 plays on almost every device and keeps files small, so podcasts, lectures and exported recordings are often shared in that format.
The MP3 to text tool accepts files up to 100 MB.
Very low MP3 bitrates can reduce accuracy, while clear speech at a normal bitrate transcribes well.
Kalpa transcribes the first 2 minutes of any MP3 for free here, and the rest of a full podcast episode is in the Kalpa app, which is free to start.
Kalpa detects the language of your MP3 automatically and supports 25 languages, including English, Spanish, German and Ukrainian.
Kalpa keeps what you watch, say and think in one place you can talk to. Free to start on iPhone and Apple Watch.
Download on the App Store