Guides · 2026-11-01

Export Claude chat to JSON

To export a Claude chat to JSON, open the conversation on claude.ai, open Chat Transfer, set the format to JSON, pick turns (Full / From turn N / Selected) and a Content mode, then click Export — you get one .json file with version, exportedAt, sourceSite: "claude", optional title, and a turns array of { role, text, index }, built on this device without waiting for Claude’s emailed account export.

Version 0.4.0 is live on the Chrome Web Store. Export never runs on its own — only when you trigger it. Soft Auto-Send stays opt-in and default off. Add to Chrome

Claude’s data export vs a one-thread JSON file

Claude has an official data export, and it is the right tool when you want your whole account. According to Anthropic’s help article Export your Claude data, individual users on Free, Pro, Max, and Ultra plans go to Settings > Privacy on the web app or Claude Desktop and click Export data; a download link arrives by email, you must be signed in to use it, and it expires 24 hours after delivery. It cannot be run from Claude for iOS or Android, and on Team or Enterprise plans an owner has to turn on member exports first.

Which export fits the job
Need	Claude Settings > Privacy > Export data	Chat Transfer Export (JSON)
Scope	Whole account (conversation data + user data)	The Claude conversation open in this tab — or a slice of it
Delivery	Email link after processing; sign-in required; expires 24 hours after delivery (source)	File saved from the extension right away; nothing is emailed
Output	Account data download	Pretty-printed `.json` with `version`, `exportedAt`, `sourceSite`, optional `title`, `turns[]` (also Markdown, Plain, CSV, HTML, PDF, State, ZIP)
Where it runs	Web app or Claude Desktop; not iOS / Android. Team / Enterprise members need an owner to allow it	Chrome on claude.ai, any plan you can open a chat on
Re-import	Anthropic says exported data can’t be imported into another personal Claude account (source)	No import into Claude either — but you can Continue a Library archive in ChatGPT, Gemini, Grok, or a new Claude chat

Rule of thumb: use Claude’s export for a full backup or account move-out; use a one-thread JSON export when you want a structured file for a script, an eval set, or another tool that prefers JSON over Markdown — today, not after an email.

What the JSON file looks like

This is the shape Chat Transfer 0.4.0 writes for a Claude thread, taken from the extension’s own formatter (toJson in extension/src/shared/format.js), with placeholder text. Schema version stays 1. There is no YAML frontmatter on JSON — that is Markdown-only.

{
  "version": 1,
  "exportedAt": "2026-11-01T01:00:00.000Z",
  "sourceSite": "claude",
  "title": "Draft API rate-limit policy - Claude",
  "turns": [
    { "role": "user", "text": "Draft a rate-limit policy for our public API: 3 tiers.", "index": 0 },
    { "role": "assistant", "text": "Here is a three-tier policy with burst and sustained limits…", "index": 1 }
  ]
}

Top-level keys: version (always 1 today), exportedAt (ISO timestamp), sourceSite (claude on claude.ai), optional title (tab title when non-empty), and turns.
Each turn: role (user / assistant / system when Keep system prompt is on), text (the turn body, same ordered text Markdown uses), index (turn index from the extract).
Unwrapped: JSON Copy/Export is unwrapped — no hop handoff wrapper. Hop paste is a separate path.
Filename: {chat-title}-{YYYY-MM-DD}.json. Content modes add -user, -code, or -assistant before .json.
Not CT Memory: This JSON export is the transcript format above. Library archives use a separate kind: ct-memory record. ZIP packs archive.json (CT Memory) plus transcript.md.

How Chat Transfer reads a Claude thread

The Claude adapter is a best-effort DOM reader for claude.ai. Anthropic remounts the page often, so it tries several hooks: user bubbles marked data-testid="user-message", and assistant replies in .font-claude-response or .font-claude-message containers. Before it keeps a reply’s text, it strips UI chrome — Copy, Retry, Share and thumbs buttons — and short “Thought process” / “Extended thinking” header lines, so the text field holds the answer rather than button labels. If none of the hooks match, the adapter does not invent turns; Copy and Export stay off until real turns appear.

That stripping matters more for JSON than for Markdown: a script that reads turns[i].text would otherwise see “Copy” and “Retry” glued onto every reply. Composer paste (for hops) targets Claude’s ProseMirror composer. Paste never clicks Send.

Steps: export one Claude chat to JSON

Add Chat Transfer from the Chrome Web Store (0.4.0) and pin it.
Open the conversation on claude.ai and wait until Claude finishes the last reply.
Long thread? Click Scroll & extract. It scrolls until the turn count stops growing or 12 passes are done, then reads the visible turns. It never clicks Send.
Under Copy & export, select JSON. Pick which turns (Full, From turn N, or Selected) and a Content mode (Full / User-only / Assistant-only / Code-only).
Click Export. The filename preview shows what you’ll get. Export also saves the thread to your on-device Library so you can search it later.

Need a readable note instead? Keep format on Markdown — see Export Claude chat to Markdown. Plain is the third radio next to Markdown and JSON.

Pick turns and Content mode before you export

Turn picker and Content modes for Claude JSON
Control	What lands in the .json	Good for
Turns: Full	Every extracted turn (subject to Content mode)	Full archive of the open conversation
Turns: From turn N	From that turn index onward	Dropping a long setup or pasted brief
Turns: Selected	Only the turns you tick	Hand-picking the good drafts
Content: Full	User + Assistant (system only if Keep system prompt)	Scripts that need the whole dialogue
Content: User-only	Only your prompts (`-user.json`)	Prompt libraries
Content: Assistant-only	Only Claude’s replies (`-assistant.json`)	Answer dumps, eval references
Content: Code-only	Only fenced code blocks (`-code.json`)	Snippet extraction

Hop payload is separate: Full / Last N (default 10; presets 4, 8, 16) / last assistant. Soft Auto-Send is opt-in, default off, and never silent-sends.

Then continue it somewhere else (optional)

A JSON export is a structured archive. From the same popup you can still hop the Claude thread to ChatGPT, Gemini, Grok, or a new Claude chat with paste as Full / Last N / last assistant. Paste never presses Send. Soft Auto-Send asks “Send this hop now?” once after a successful paste when you opt in. Guides: Hop Claude to ChatGPT, Hop Claude to Gemini, Hop Claude to Grok, Soft Auto-Send.

Local only

Chat Transfer reads the page you already have open and formats the file inside the extension. There is no Chat Transfer backend, the marketing site never receives your chat text, and host access is limited to ChatGPT, Claude, Gemini, and Grok pages (including x.com/i/grok). Export needs no downloads permission. Details: privacy policy and Local only.

Limits worth knowing

It exports what is rendered in the tab. Turns Claude hasn’t loaded yet need Scroll & extract first.
Uploaded files, images, and artifact panels are not rebuilt as binary — the text may note an attachment instead.
Thinking headers and tagged thinking panels are stripped on purpose, so the JSON aims to hold the visible reply; the strip is best-effort, so skim long replies once.
It is one thread at a time. For your whole history, use Claude’s Settings > Privacy > Export data.
Selectors are best-effort. If Anthropic changes the page and extract finds no turns, Copy and Export stay off rather than writing an empty or invented file.

FAQ

Can I export a single Claude conversation to JSON?

Yes. Open that conversation on claude.ai, pick JSON in Chat Transfer, and click Export. You get one .json file for that conversation (or slice) only.

Does Claude have a built-in JSON export for one chat?

Claude’s documented export is account-wide: Settings > Privacy > Export data, delivered as an emailed link that expires 24 hours after delivery (Claude Help Center). Chat Transfer covers the one-thread JSON case.

Can I export from the Claude mobile app?

Not with either path. Anthropic says the account export can’t be run from iOS or Android, and Chat Transfer is a Chrome extension that reads claude.ai in a desktop browser.

Does the JSON include Claude’s thinking?

No. The adapter strips “Thought process” style headers, tagged thinking panels, and UI buttons so text holds the visible reply (best-effort).

Is my chat uploaded anywhere?

No. Formatting happens in the extension on this device. Library copies stay in chrome.storage.local (large bodies may use IndexedDB).

Does Export press Send?

No. Export downloads the file and adds the thread to your local Library; it never sends. Soft Auto-Send (hop only) is opt-in, default off, and never silent-sends.

Sources

Export your Claude data — Claude Help Center
JSON.org (JSON data-interchange format)
Chat Transfer on the Chrome Web Store
Chat Transfer privacy policy

Product · Guides · Export Claude chat to Markdown · Export ChatGPT chat to JSON · Search Claude history locally · Hop Claude to ChatGPT · Hop Claude to Gemini · Hop Claude to Grok · Soft Auto-Send · How to use · Local only · Privacy · Add to Chrome