See the whole conversation.

Export any iMessage thread as a clean, private transcript for ChatGPT, Claude, or Gemini.

Download for Mac See how it works

Free to try macOS 14 or later 50% off until November 30

How Lembic works

Watch the tour 0:40

Why people use it

Everyone opens an old thread for a different reason.

Here are four. Each one has a prompt built into the app.

A mug on a stack of books on a windowsill at dusk, trees glowing in the last light

Make sense of a hard relationship

It’s late, and you’ve read the same thread three times tonight. Each message makes sense on its own. Together, they don’t. You want someone to see the whole pattern, not only the exchange that hurt.

Lembic gives your AI the full history, in order. It can describe how things began, what changed, and where you are now. You decide what to make of it.

The prompt in Lembic: Summarize this relationship
Summarize this relationship based on the conversation above: how it started, how it's evolved, the major turning points, the current state, and the overall dynamic. Write it as a narrative, not bullet points.

Pick it in Lembic. It goes in after the transcript when you copy.

Two empty green mugs side by side on a stone table in low afternoon light

See when someone’s tone changed

A friend used to answer in paragraphs. Now it’s “haha,” a day later. You can’t say when it changed, or if you imagined it.

With the whole thread in view, the AI can point to where the warmth faded and who started to write less. It quotes the messages, so you can check its reading against your own.

The prompt in Lembic: Analyze the tone and dynamic
Analyze the tone and dynamic of the conversation above. Who tends to lead, who follows? What's the emotional temperature? Point out recurring patterns, friction points, and any red or green flags — quote specific messages as evidence.

Pick it in Lembic. It goes in after the transcript when you copy.

A Lembic transcript: a date header for Wednesday, November 26, 2025, then timestamped messages from Maya and Me about taking the train A Lembic transcript: a date header for Wednesday, November 26, 2025, then timestamped messages from Maya and Me about taking the train
A real Lembic transcript, with sample messages.

Put what happened in order

The plan is buried somewhere in nine hundred messages of group chat. Or it’s a parent’s texts from a hard year, and you want to keep them in the order they were sent.

Every day in a Lembic transcript starts with its date. So the AI can build a timeline you can check against the source: the decisions, the dates, and the loose ends nobody closed.

The prompt in Lembic: Make a timeline of key moments
Build a chronological timeline of the key moments in the conversation above — first contact, milestones, notable events, turning points, and significant gaps. Give a date and a one-line description for each. Focus on what actually mattered, not every message.

Pick it in Lembic. It goes in after the transcript when you copy.

Also in Lembic: Extract every commitment
Go through the conversation above and extract every commitment, promise, plan, or agreement either person made. For each, note who made it, what it was, the date, and whether the thread shows it was followed through. Present it as a checklist.

Pick it in Lembic. It goes in after the transcript when you copy.

A blank sheet of paper and a pen on a dark desk, with three crumpled drafts beside it

Read your reply before you send it

You’ve typed the reply, deleted it, and typed it again. You want to know how it will land with someone who knows the whole history.

Paste the thread and your draft into your AI, and ask how it reads. Or let it draft a reply in your voice, from everything you two have said. The words you send are still yours.

The prompt in Lembic: Draft a reply in my voice
Based on the conversation above, draft a reply I could send to their most recent message. Match my voice — my phrasing, my level of formality, and my typical message length — so it sounds like me, not a generic assistant.

Pick it in Lembic. It goes in after the transcript when you copy.

These moments are examples, not customer stories. Lembic gives your AI the whole conversation. It isn’t therapy or legal advice, and the AI can be wrong. Treat what it says as one view, and make your own call.

From years of messages to one clear view.

  1. Choose a thread.

    Pick any conversation by name. Take the whole history or a date range.

  2. Review what matters.

    Check that it fits your AI. Redact anything you would not share.

  3. Ask with context.

    Copy it into ChatGPT, Claude, or Gemini with a one-click prompt.

Privacy

Private by architecture.

No account. Lembic never uploads your messages.

Lembic builds the transcript on your Mac. Your texts reach an AI only when you paste them, into your own account.

  • Runs on your Mac. Lembic goes online only to check your license and to look for updates. Your messages are not part of those checks.
  • Open-source engine. LembicKit reads your messages. Read its code, or build it yourself.
  • One permission. Full Disk Access, the same switch backup apps use. Revoke it anytime.
Lembic stopping a copy to say it found 6 things that look sensitive, with Review, Redact all, Copy anyway, and Cancel buttons Lembic stopping a copy to say it found 6 things that look sensitive, with Review, Redact all, Copy anyway, and Cancel buttons

Exports

Take it anywhere.

AI-ready text by default. Pro adds PDF, CSV, Word, and Excel, and can export your whole history at once.

  • .txt AI-ready text
  • .jsonl JSON Lines
  • .pdf PDF Pro
  • .csv CSV Pro
  • .docx Word Pro
  • .xlsx Excel Pro
Export iMessages to PDF, CSV, Word, or Excel

Pricing

Pay once. Keep it.

No subscription. Free updates. A 30-day money-back guarantee, for any reason.

Founding price ends .

Both plans are 50% off until then. The code is already applied at checkout.

Standard

The AI-ready export, yours to keep.

Founding price $12.49, regularly $24.99, paid once. $24.99, paid once.

  • Compact, token-efficient transcript built for AI
  • Every one-click prompt
  • Token meter that shows if it fits your model
  • Export any 1:1 or group thread, whole or by date range
  • Plain-text and JSONL export
  • Unlimited exports, plus free updates
Buy Standard for $12.49$24.99

Pro

Every format, and your whole history at once.

Founding price $19.99, regularly $39.99, paid once. $39.99, paid once.

  • Everything in Standard
  • Export to PDF, Word, Excel, and CSV
  • Export your entire message history at once, one file per conversation
  • Take your messages anywhere, not just to an AI
Buy Pro for $19.99$39.99

Every plan uses the open‑source engine. Lembic reads the Messages database on your Mac. If Apple changes or removes it, the app may stop working. You get a 30-day money-back guarantee, for any reason. After 30 days, refunds are not available. Terms

Questions, answered.

How do I export an iMessage conversation?
Pick the conversation and click Export. You get a clean text file of the whole thread, ready to read or hand to an AI like ChatGPT, Claude, or Gemini. No Terminal, no PDF wrangling.
How do I get my texts into ChatGPT, Claude, or Gemini?
That’s the whole point. Export, click Copy, and paste into ChatGPT, Claude, Gemini, etc. You can send a one-click prompt along with it, like “summarize this relationship.”
Is it safe? Do my messages get uploaded?
No. Lembic reads your messages and builds the transcript on your Mac. It never uploads your messages, and there is no account. Lembic goes online only to check your license and to look for updates. The export engine is open source, so you can verify exactly what it does instead of taking our word for it.
Why does it need Full Disk Access?
macOS keeps your Messages database behind Full Disk Access, the same switch you grant Time Machine and other backup tools. You grant it once, and you can revoke it anytime in System Settings.
Is it a subscription?
No, it’s a one-time purchase. Pay once and your exports are yours for good. Until November 30, the founding price is 50% off with code FOUNDING50.
See every answer

Start with one conversation.

Free to try. Pay once when you are ready to export.

Download for Mac

50% off. Founding price ends .