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ChatGPT and Claude conversations.json to Markdown, Word and HTML

Drop the data export you got from ChatGPT or Claude (the .zip, or the conversations.json inside it). Pick conversations and download them as Markdown, Word (.docx) or HTML files. Free, no sign-up.

Your chats never leave this page. The conversion runs in your browser on your computer. There is no server and no upload: this site is static files, and nothing you drop is sent anywhere. After the page and its own scripts load, it makes no further requests. You can turn off your Wi-Fi after the page opens and it still works.

Drop your ChatGPT or Claude export here

conversations.json or the export .zip, up to several GB

Choose a file

How to get your export

• ChatGPT: Settings, Data controls, Export data. OpenAI emails you a link to a zip. It holds conversations.json (or several conversations-000.json files) and a chat.html.
• Claude: Settings, Privacy, Export data. Anthropic emails a link to a zip with conversations.json, projects.json and users.json.

What you get

• One file per conversation, named date title.md (or .docx, .html), or all of them in one combined Markdown file.
• Code blocks keep their language, tables and lists stay, and ChatGPT citation markers are removed.
• Where you edited a message or regenerated a reply, you get the version that was on screen, not the discarded branches.
• Images and attached files are not in the export text, so they appear as [Image attachment] or [Attachment: name] placeholders.

Questions

Is my data uploaded anywhere?

No. The file is read by a script on this page running in a background thread of your own browser. Open your browser's Network tab, drop a file, and you will see no request carrying your data. The page is hosted on GitHub Pages as plain static files, so there is no server of ours to receive anything. GitHub Pages does serve the page itself, so GitHub sees an ordinary page visit, as with any site.

Can it handle a very large export?

It reads the file in a stream, one conversation at a time, so a 100 MB or larger conversations.json does not freeze the page, and we tested a 110 MB file with 125,000 messages. The limit is your computer's memory: the converted conversations are held in memory, and one zip download is capped at about 800 MB, so for the very biggest exports download in several batches. The photos and audio inside a ChatGPT zip are not read at all.

Which parts of a conversation are left out?

Hidden system messages, web-search results, tool output and reasoning summaries are skipped, because they are not part of the visible chat. Images and files are not converted (placeholders only). Voice and canvas details may be partial. If something you can see in the app is missing, the export format may have changed.

Will it keep working if OpenAI or Anthropic change the export format?

Neither company publishes an official specification for these files, so we wrote this against the layout of real exports as documented by the community, and it may need updating when a format changes. If a file is not recognised, the page says so instead of producing empty files.

What about Gemini or other assistants?

Only ChatGPT and Claude exports are supported here. Gemini data comes from Google Takeout in a different format.

Who makes this?

Tidyleaf, a small maker of privacy-first browser extensions. This tool is free and independent: it is not made, endorsed or reviewed by OpenAI or Anthropic. "ChatGPT" and "Claude" are used only to say which exports it reads.

Want to understand the file first? Read How to read conversations.json: how to request the export, what is in the zip, and how the mapping tree and edited branches work.

Need one chat right now?

The data export takes time to arrive and covers every chat. To save the conversation you have open, our free Chrome extension adds an Export button to ChatGPT, Claude and Gemini: Tidyleaf AI Chat Exporter (disclosure: our product; bulk export of all chats is a paid Pro feature, this converter is not). See how it compares.