How to Transcribe LINE Voice Messages to Text

Q: How do I save a LINE voice message?

On iPhone: long-press the message, tap Share, then 'Share to apps,' and choose Save to Files. Alternative: long-press, tap Forward, and send the message to Keepメモ (Keep Note) as a staging area before sharing it from there. On a PC, right-click the message and choose Save As.

LINE is the default messenger for tens of millions of people in Japan, Taiwan, and Thailand — and it is also one of the last major messaging apps without built-in voice message transcription. Every voice message has to be listened to in full, and unlike WhatsApp, there is no hidden transcript feature waiting in the settings.

That is not a dead end. On iPhone there are three reliable ways to transcribe LINE voice messages to text, and two of them take less than a minute. Here is each method, step by step, followed by one tip that saves people who receive a lot of LINE voice messages on a regular basis.

Method 1: Share Sheet Directly to a Transcription App (Fastest)

LINE hands voice messages to the iOS share sheet, which means you can skip file management entirely and transcribe in one step.

Long-press the voice message in LINE and tap Share.
Tap "Share to apps" in the share menu.
Choose "Transcribe with Audio Notes AI" from the iOS share sheet.
Wait about 30 seconds for the transcript.

This works because the Audio Notes share extension accepts audio handed over by any app, and the result is far more useful than plain text:

60+ languages via Whisper transcription, including Japanese — no language pack to download.
AI summary and action items generated automatically, plus chat-with-your-notes for follow-up questions.
One-tap translation of the transcript for messages sent in Japanese or other languages.

Every account includes 60 minutes of lifetime transcription for free. Pro ($5.99/month) unlocks 10,000 minutes per month, a 90-minute cap per recording, and iCloud sync.

Method 2: Save to Files, Then Import

If you want to keep the original audio file as well as the text, save it first and import it afterwards.

Long-press the voice message, tap Share, then "Share to apps".
Tap Save to Files in the iOS share sheet — the clip is saved as an .m4a file.
Open Audio Notes AI, tap Import, and select the file.

Alternative: stage it in Keep Note

If the share menu is not cooperating, LINE's built-in Keepメモ (Keep Note) works as a staging area: long-press the message, tap Forward, send it to Keepメモ, then open Keep Note and share the saved message from there — either straight to a transcription app or to Files.

On a computer

LINE for PC offers the easiest export of all: right-click the voice message, choose Save As, and download the file — then import it into Audio Notes AI and transcribe it the same way.

Method 3: Screen Recording Fallback

For messages that refuse to share, or for older clips where LINE blocks the menu, screen recording always works.

Open Control Center and long-press the record button.
Keep the microphone OFF — the audio plays through the speaker, so re-recording it would add distortion.
Start recording, play the voice message from start to finish.
Stop the recording, then import the resulting .mp4 into Audio Notes AI, which extracts the audio automatically.

This is the slowest route — about five minutes per message — so use it only when the share sheet is unavailable.

Transcribe Early — LINE Voice Messages Can Expire

LINE does not guarantee indefinite retention of voice messages: they can expire after weeks, and there is no reliable way to predict when. If a message matters, transcribe or save it promptly instead of leaving it sitting in the chat — "I'll get to it later" is how important LINE voice notes get lost.

Comparing the Three Methods

Method	Time	Languages	You End Up With	Best For
Share sheet to app	About 30 seconds	60+	Transcript, summary, action items	Everyday voice messages
Save to Files, then import	About 2 minutes	60+	`.m4a` file plus transcript	Archiving and batch processing
Screen recording	About 5 minutes	60+	`.mp4` plus transcript	When sharing or saving fails

Frequently Asked Questions

Does LINE have built-in voice message transcription?

No. LINE still has no built-in way to transcribe voice messages. Call transcription is planned for autumn 2026, but only for LYP Premium subscribers — voice messages are unaffected, so the share sheet methods above remain the only route.

How do I save a LINE voice message?

On iPhone: long-press the message, tap Share, then "Share to apps," and choose Save to Files. Alternative: long-press, tap Forward, and send the message to Keepメモ (Keep Note) as a staging area before sharing it from there. On a PC, right-click the message and choose Save As.

Do LINE voice messages expire?

Yes — they can expire after weeks, with no visible countdown. Transcribe or save important messages promptly rather than assuming they will stay in the chat forever.

Can I transcribe Japanese LINE voice messages?

Yes. Audio Notes AI transcribes 60+ languages including Japanese, then translates the transcript in one tap — useful when a group chat mixes Japanese with other languages.

How long can a LINE voice message be?

Roughly 30 minutes in-app with a 200MB file cap (unofficial figures). Short messages transcribe in seconds, and even the longest fit comfortably within the 90-minute recording cap on Pro.

Stop Re-Listening to LINE Voice Messages

Every LINE voice note you transcribe is one you will never have to replay. Download Audio Notes AI free on the App Store — 60 minutes of lifetime transcription included — and turn Japanese, Mandarin, or English voice messages into searchable text with AI summaries in about 30 seconds. Prefer the built-in route elsewhere? See how to transcribe WhatsApp voice messages, the 10-app comparison, or our roundup of best speech to text apps.