Turn a LINE Voice Message into Text
LINE has no built-in feature that turns a voice message into text, and there is no way to connect to a LINE chat and pull a message automatically: LINE conversations are private, so the audio has to come from a file you already have. Save the voice message from your chat, then upload it to ScreenApp for a transcript.
Reading the text back is faster than replaying a voice message to catch one detail, especially when it runs several minutes.
What you get:
- speaker identification, useful for forwarded voice messages and group chats with more than one speaker
- transcript and caption translation, so a message in Japanese, Thai, or another language reads in yours
- Export as PDF, DOCX, TXT, SRT and VTT
- AI chat with the transcript, so you can ask a question about it instead of relistening
- Free plan: 2 transcriptions of recordings up to 45 minutes each
How to Transcribe a LINE Voice Message
- Save the voice message: Open the chat in LINE, tap and hold the voice message, and use the save or download option to get the audio file onto your phone or computer. If your version of LINE has no save option for that message, play it back on speaker and record it instead, using the ScreenApp mobile app or a browser mic recorder.
- Upload it: Drop the file into ScreenApp or use the upload button. ScreenApp accepts MP3, M4A, MP4A, M4B, AAC, WAV, OGG, OPUS, FLAC, AIFF, WMA, WEBMA, MKA, AC3, EAC3, WV, AMR, DSF, DFF, so a saved LINE voice message uploads without converting it first.
- Read or translate the transcript: The transcript, with speaker labels, is ready a few minutes later. Translate it, search it for a word, or ask the AI a question about it.
Accuracy depends on the recording, not just the transcription engine. A voice message recorded close to the phone’s mic in a quiet room transcribes cleanly; one sent from a noisy street or played back through a speaker and re-recorded will have more gaps. Check supported languages and accuracy before relying on a transcript for anything important.
LINE Voice Message Transcription vs Other Tools
| Feature | ScreenApp | Otter.ai | Notta.ai | Rev | Sonix |
|---|---|---|---|---|---|
| Free tier | 2 transcriptions, up to 45 min each | 300 min/month | 3 min per conversation | 45 min/month | 30 min trial |
| Languages | 100+ | 6 | 58 | 37 | 54+ |
| Speaker identification | Yes | Yes | Yes | Not stated | Yes |
| Translation | Yes | Not stated | Not stated | Not stated | 55+ languages |
| Upload a saved voice message file | Yes | Yes | Yes | Yes | Yes |
| Paid plan | $19/month annual | $8.33/month annual | $8.17/month annual | $25.49/month annual | $25/month |
Sources, checked 2026-10-01: ScreenApp pricing, otter.ai/pricing, notta.ai/en/pricing, rev.com/pricing, sonix.ai/pricing, screenapp.io/accuracy#languages, notta.ai/en, rev.com/apps-and-tools/audio-transcription-app
- vs Otter.ai: Otter transcribes 6 languages, which covers little of LINE’s user base across Japan, Thailand, and Taiwan. Its free plan caps transcription at 300 minutes a month. ScreenApp transcribes 100+ languages and includes translation.
- vs Notta.ai: Notta supports 58 languages and starts at $8.17 a month for its Pro plan, but the free plan limits a recording to 3 minutes. ScreenApp’s free plan covers a full recording up to 45 minutes.
- vs Rev: Rev transcribes 37 languages and its free plan gives 45 minutes a month. ScreenApp covers more languages and adds translation and AI chat on the free tier.
- vs Sonix: Sonix transcribes 54+ languages and translates into 55+, with a 30-minute trial rather than an ongoing free plan. ScreenApp’s free plan renews every recording rather than running out after a single trial.
Who Transcribes LINE Voice Messages
Business teams in Asia use LINE for daily work chat across Japan, Thailand, Taiwan, and Indonesia. Turning a voice message into text creates a searchable record of a client discussion or a decision that would otherwise sit buried in a chat thread.
Students and language learners studying Japanese, Korean, or Thai save voice messages from tutors or exchange partners and transcribe them to check vocabulary and grammar line by line instead of replaying the audio repeatedly.
Journalists who receive an interview or a statement as a LINE voice message get a transcript with speaker labels, which makes it easier to pull an exact quote without scrubbing back through the audio.
Freelancers and remote workers who get voice briefs from clients over LINE turn them into a written task list, and keep the transcript as a record of what was asked for.
Anyone forwarded a long voice message who would rather read a transcript in a minute than listen to several minutes of audio, particularly across a language they read better than they hear.