Make your LINE even better

Read without being read, recover unsent messages, back up all files, export full history, let AI analyze your conversations.

Read without being read

Want to check a message without the sender knowing? LINE's read receipt system gives you no choice.

Read directly from the local database, completely bypassing LINE's read receipt mechanism. Text, photos, videos, voice messages — all visible without triggering read status.

Use cases

  • Boss messages you at midnight — preview before deciding to "read" it
  • Not sure if you want to reply? Peek first, decide later
  • Someone @mentioned you in a group — check what it's about first
LINE Data MasterUUser@user_id💬Chats👤Contacts📋Notes🖼️AlbumsBBossCan you check …3PProject@You meeting a…12MMomCome home for …1DDavidPhoto sentBossCan you review the report?I need it by tomorrow morning📷Please reply ASAP👀 LINE still shows:UNREADNo read receipt

Unsend won't save them

Someone unsends a message and all you see is "message was unsent." You'll never know what they said.

When LINE unsends a message, it only marks it as deleted — the original content remains in the local database. We cross-reference 5 different sources to recover text, images, stickers, and more.

* Recovery rate varies by message type and timing, but is high in most cases.

Use cases

  • Someone unsends in a group and everyone asks "what did they say?" — you already know
  • Recovered content includes images and stickers, not just text
LINE Data MasterUUser@user_id💬Chats👤Contacts📋Notes🖼️AlbumsAAmy3 recalled mes…PProjectMeeting minute…SSalesQ1 report shar…AmyHey, about the project...Message unsentRECOVEREDI think the manager is...Message unsentRECOVERED😡Never mind, forget itMessage unsentRECOVERED📷

Hidden chats, fully visible

LINE buries hidden chats deep in the UI. Finding them again is a hassle.

We read the database directly — all chats appear equally. No matter how many conversations you've hidden, they're all here. Search, browse, and export just like regular chats.

Use cases

  • Hidden too many chats and forgot which conversations are hidden
  • Need to find a message in a hidden group chat quickly
LINE Data MasterUUser@user_id💬Chats👤Contacts📋Notes🖼️AlbumsMMomCome visit thi…WWorkDeadline moved…hiddenEExHappy birthday…hiddenSShoppingOrder shippedhiddenFFriendsBBQ this Satur…WorkhiddenThe deadline has been movedNew deadline: this FridayGot it, thanks!Don't forget the meeting at 2🔓 All chats visibleSearch, browse, export — same as regular chats

No more endless scrolling

Looking for a message from three years ago? In LINE, you scroll and scroll — one slip and you're back at the latest messages, starting over.

Jump to any date instantly, browse with pagination — no loading delays. Full-text search across all chats finds exactly what you need in seconds.

Use cases

  • Find last year's trip discussion — enter the date and you're there
  • Want to see a group's first message? No need to scroll through years of chat
LINE Data MasterUUser@user_id💬Chats👤Contacts📋Notes🖼️AlbumsTTravel Gro…3,847 messagesFFamily12,891 message…WWork28,432 message…Travel Group2024-07-15📅🔍 Search...2024/07/15We should visit the temple!I'll book the hotelCheck this photo I found🏠<151617>

Your data, portable

LINE's built-in export is plain text only — no images, no files. Switch phones or computers and your history is gone.

Export as HTML, CSV, or JSON. Choose a date range or export everything. Messages, threads, notes, albums, and media — all bundled. HTML exports open directly in any browser.

Use cases

  • Handing off a work group — export the entire chat with files for the next person
  • Preserve relationship memories — export as HTML to revisit anytime
  • Important community thread discussions — fully archived
LINE Data MasterExport ChatTravel Group — 3,847 messagesFormatHTMLCSVJSONDate Range2024-01-01~2024-12-31IncludeMedia filesThreadsNotesAlbumsExport

Let AI understand your chats

Want AI to summarize meetings or analyze discussions? But there's no way to feed LINE messages to AI tools.

Built-in MCP Server connects to Claude Desktop in one click. AI can search messages, read threads, view images — summarize, analyze, translate. All processed locally, never through third parties.

Use cases

  • "Summarize last week's meeting conclusions from this group"
  • "What's this community thread arguing about? Give me a summary"
  • "Translate this Japanese conversation to English"
LINE Data MasterCClaude DesktopSummarize last week's meetingconclusions from Project groupMeeting Summary (Mar 17-21)1. Launch date confirmed: April 52. Design review completed3. Budget approved ($12,000)4. QA testing starts next MondayAction Items:- David: Send final mockups- Amy: Update test plan- You: Review API docsSource: 47 messages from Project group🔒 MCP: Reading from local LINE databaseProject Group3,847 msgsDavid: Launch date is April 5Amy: Design review done ✓Boss: Budget approved $12kAmy: QA starts next Monday📷mockup_v3_final.png💬 Thread: API Discussion15 replies — AI can read these too💚 All data stays on your computer

Photos and videos won't expire

LINE media has an expiration date. Once expired, you can never download them again.

Batch download original-resolution photos, videos, and files from all chats. Enable scheduled backup and never worry about expired media. Already-downloaded files are skipped automatically.

Use cases

  • Travel photos shared in groups — keep a copy in original quality
  • Important work files — automatically backed up, nothing missed
LINE Data MasterUUser@user_id💬Chats👤Contacts💾Backup📊StatsMedia BackupDownload original resolution photos & videosTotal: 2,847 / 3,512 files1.8 GB savedTravel Group847 / 847Family1203 / 1520Work Project456 / 789Friends341 / 356

All data stays on your computer

Reads local database only — no chat content is ever uploaded

Encryption keys stay in memory, never written to disk

Open verification methods — check network traffic yourself

Learn about our privacy design

Try it now

Windows 10/11, no admin rights needed. Up and running in 3 minutes.

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Want more?

Have a feature idea or special requirement? Contact us and we'll build it for you.

LINE Data Master — Browse, Back Up & Export LINE Desktop Chat History