Transcribe LINE Voice Messages: iPhone & Android Guide

Aug. 17, 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, simply save the voice message and upload it to an AI transcription website.

    You can easily convert voice messages to text from both iPhone (iOS) and Android smartphones.

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

    What you'll learn in this article:

    • How to transcribe voice messages (for iPhone and Android)
    • How to record and transcribe LINE calls and phone conversations
    • 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 websites.

    The transcription process involves just 3 steps:

    1. Save the voice message (save the audio file using LINE's transfer feature)
    2. Upload to a transcription website (simply select the saved file)
    3. Check the transcription results (you can copy or download the text)

    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 the voice message

    Select "Forward" from the menu.

    Select 'Forward'

    You will then be prompted to select which messages to forward. Check the box for the voice message and tap the "Forward" button.

    Select the voice message

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

    Tap 'Other apps'

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

    From here, the operation differs for iPhone and Android.

    Saving 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 'Save to Files'

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

    Tap 'Save' in the top right corner

    Saving 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 Website

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

    Open the Mr. Transcription homepage from here.

    Mr. Transcription homepage

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

    Select file

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

    Selecting Audio Files on iPhone/iPad (iOS)

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

    Tap "Choose File".

    Tapping 'Select' opens a menu

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

    Select file

    Selecting Audio Files on Android

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

    Tap 'Select media'

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

    The 'Files' app's file selection screen opens

    Upload File and Start Transcription

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

    Press the 'Transcribe' button

    The upload will complete quickly, and the transcription process will start 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 snippets and edit the transcription results for specific sections.

    Partial playback feature

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

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

    Mr. Transcription's supported files and file sizes. How to convert unsupported files to supported files

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

    We'll guide you through Mr. Transcription's supported files 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 website Mr. Transcription is highly recommended.

    Mr. Transcription is an AI transcription website that allows anyone to easily convert audio to text using the latest AI technology.

    With its high accuracy powered by the latest AI, even long audio can be transcribed in about 1 minute.

    As a web application accessible via a browser, it works seamlessly 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 features an AI summary and automatic meeting minutes creation function from the transcription results.

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

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

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

    How to Transcribe LINE Calls and Phone Conversations on iPhone and Android Smartphones

    How can I transcribe the content of a LINE call?
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    When you want to transcribe the content of a LINE call (phone conversation), 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 will explain each separately.

    How to Record LINE Call Audio

    ■ 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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