Transcribe LINE Voice Messages: iPhone & Android Guide

April 5, 2026

Transcribe LINE Voice Messages: iPhone & Android Guide | AI Transcription Service - Mr. Transcription

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    I want to know how to transcribe LINE voice messages!

    To transcribe LINE voice messages, all you need to do is save the voice message and upload it to an AI transcription website.

    You can easily convert them to text from either an iPhone (iOS) or Android smartphone.

    This article explains how to transcribe LINE voice messages and calls, and how to use LINE's voice input feature, with clear screenshots.

    What you'll learn in this article:

    • How to transcribe voice messages (for iPhone and Android)
    • How to record and transcribe LINE calls
    • How to send LINE messages using voice input

    ※ If you already have the voice message audio file, you can transcribe it by simply uploading it to Mr. Transcription.

    How to Transcribe LINE Voice Messages [iPhone/Android Compatible]

    LINE voice messages can be easily transcribed using the latest AI transcription sites.

    The transcription process involves just 3 steps:

    1. Save the voice message (save the audio file using LINE's forwarding feature)
    2. Upload to a transcription site (just select the saved file)
    3. Check the transcription results (text can be copied or downloaded)

    Let's go through the detailed steps together.

    Step 1: Save the Voice Message

    First, save the LINE voice message to your iPhone or Android smartphone.

    To save a voice message, first, long-press the voice message.

    A menu will appear above the voice message.

    Long-press voice message

    From the menu, select "Forward".

    Select

    You will then be prompted to select which messages to forward. Select the voice message using the checkbox and tap the "Forward" button.

    Select voice message

    On the screen that opens, tap "Other apps" under "Select destination".

    Tap

    Up to this point, the steps are the same for both iPhone (iOS) and Android smartphones.

    From here, the operation differs between iPhone and Android.

    How to Save Voice Messages on iPhone/iPad (iOS)

    For iPhone or iPad iOS, scroll down the menu slightly and select "Save to Files".

    Scroll down the menu slightly

    Select

    On the screen that opens, tap "Save" in the upper right corner to finish saving the voice message to your iPhone or iPad.

    Tap

    How to Save Voice Messages on Android Smartphones

    For Android smartphones, select the destination app.

    This time, we selected "Files by Google Downloads" (the standard file app).

    Select the destination app

    Once selected, the file will be automatically downloaded and saved.

    File automatically downloaded and saved

    This completes saving the voice message audio to your Android smartphone.

    Step 2: Upload to a Transcription Site

    Next, upload the saved audio file to the AI transcription site Mr. Transcription.

    Open the Mr. Transcription top page from here.

    Mr. Transcription top page

    Scroll down a bit, then tap "Select" to choose your file.

    Select file

    From here, the operation differs slightly between iPhone (iOS) and Android.

    How to Select Audio Files on iPhone/iPad (iOS)

    For iPhone or iPad iOS, tapping "Select" opens a menu.

    Tap "Select File".

    Tapping

    The file selection screen will open, so select the file you want to transcribe.

    Select file

    How to Select Audio Files on Android

    For Android smartphones, tap "Select" and choose "Select media" from the menu that opens.

    Tap

    The "Files" app's file selection screen will open. Navigate to the folder where you saved the voice message file and select it.

    The

    Upload File and Start Transcription

    After selecting the file, press the "Transcribe" button to upload the voice message audio file.

    Press the

    The upload will complete quickly, and the transcription process will begin automatically.

    Transcription process starts

    Step 3: Check the Transcription Results

    For short audio files, the transcription process finishes quickly.

    Once the transcription process is complete, the screen will change to display the transcription results.

    Transcription complete

    You can copy the transcribed text or save it as a text file.

    You can also play back audio sections and edit the transcription results.

    Partial playback function

    LINE voice message audio files are saved as m4a or MP4 files on iPhone, and AAC files on Android smartphones.

    Mr. Transcription supports all these file formats, so you can transcribe voice messages directly from both iPhone and Android.

    Supported files and file sizes for Mr. Transcription. How to convert unsupported files to supported files

    Mr. Transcription's Supported File Types and Sizes. How to Convert Unsupported Files

    Learn about Mr. Transcription's supported file types and what to do if your file is not supported.

    Recommended Transcription Site for LINE [Voice Message Compatible]

    Mr. Transcription

    If you want to transcribe LINE voice messages or call audio, the AI transcription site Mr. Transcription is highly recommended.

    Mr. Transcription is a transcription site that allows anyone to easily convert audio to text using the latest AI.

    Thanks to its cutting-edge AI, it offers high accuracy and can transcribe even long audio in about 1 minute.

    Since it's a web app used through a browser, it works on any device, including iPhone/iPad (iOS), Android smartphones/tablets, and computers.

    It supports over 100 languages, so you can transcribe foreign language voice messages directly.

    Furthermore, it includes a feature to automatically generate AI summaries and meeting minutes from the transcription results.

    This is convenient for those who want to summarize the content of LINE calls into meeting minutes.

    What's more, Mr. Transcription is free to use.

    You can transcribe up to 3 minutes of audio without registration or login, so why not give it a try?

    How to Transcribe LINE Calls on iPhone and Android Smartphones

    How do I transcribe the content of a LINE call?
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    When you want to transcribe the content of a LINE call, it's recommended to record the audio during the call using the screen recording feature and then convert it to text with an AI transcription website.

    The method for recording LINE call audio differs between iPhone (iOS) and Android smartphones, so we'll explain each separately.

    How to Record LINE Call Audio on iPhone

    ※ Explained using iOS 26.

    On iPhone and iPad, you can save LINE call screens and audio by using the screen recording feature during a LINE call.

    To use the screen recording feature, first, swipe up from the bottom of the screen to open the Control Center.

    Tap the screen recording button in the Control Center.

    Screen recording button

    Then, recording will start after a "3, 2, 1" countdown.

    The screen recording button will appear red during recording.

    Recording in progress

    When you close the Control Center

    ■ AI transcription service "Mr. Transscription"

    "Mr. Transcription" is an online transcription tool that can be used from zero initial cost and 1,000 yen per month (* free version available).

    • Supports more than 20 file formats such as audio, video, and images
    • Can be used from both PC and smartphone
    • Supports technical terms such as medical care, IT, and long-term care
    • Supports creation of subtitle files and speaker separation
    • Supports transcription in approximately 100 languages ​​including English, Chinese, Japanese, Korean, German, French, Italian, etc.

    To use it, just upload the audio file from the site. Transcription text is available in seconds to tens of minutes.
    You can use it for free if you transcribe it for up to 10 minutes, so please try it once.

    It is "Mr. Transcription" who can easily transcribe from audio, video, and images. Transcription allows you to transcribe for up to 10 minutes for free. You can copy, download, search, delete, etc. the transcribed text. You can also create subtitle files, which is ideal for transcription of interview videos.
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