Audio: MP3, M4A (AAC), WAV, FLAC, OGG, Opus, AAC and M4B. Video: MP4, MOV, WebM, MKV and TS; only the audio track is used. Local files have no product size or duration cap. Files are read and decoded in sections. Codec support, memory and speed depend on your browser and device.
Not supported: Apple Lossless (ALAC) M4A, AIFF, WMA, AMR voice recordings (.amr or .3gp), AVI, ADPCM WAV, and videos with Dolby (AC-3 or E-AC-3) audio. Convert these to MP3 or WAV first; renaming a file does not convert its audio. An unsupported file is reported as soon as you add it.
YouTube links and Notion
Paste a public YouTube link on the homepage or the YouTube transcript page. Original captions are free without an account. A video without captions can be transcribed on your device after signing in, up to five per day; the audio is fetched once by a service hosted on Cloudflare and is not kept. Saving to Notion requires signing in and authorizing your workspace. Cloud transcription is not open yet.
TXT, SRT, Markdown and ZIP downloads include the full available text, even for long recordings. Cancelled or failed recordings can export their partial text. Use Save to Notion beside Export to prepare a local text draft and continue in a new tab. Your recording stays open; login and Notion connection happen in My library. Notion saves currently accept up to 60 minutes, 10,000 segments and 1 MB of text per recording.
MP3
A supported MP3 can be selected directly, including recordings longer than 60 minutes. Keep this page open while processing.
M4A
Most M4A files contain AAC audio and work. iPhone Voice Memos recorded with Audio Quality set to Lossless use Apple Lossless, which Chrome and Edge cannot decode: choose Compressed for new recordings, or convert existing ones to AAC M4A or WAV.
WAV and damaged files
WAV works with 8-, 16-, 24- and 32-bit PCM, 32-bit float, µ-law and A-law audio, decoded in sections. If a file fails, check that it plays in your recorder, export it again, or try a shorter recording on a computer.