01
Export from ChatGPT
Go to Settings → Data Controls → Export data. You'll get an email with a download link.
Takes about 5-10 minutes to receiveChatGPT migration
Your ChatGPT conversations, organized.
ChatGPT's data export gives you a massive JSON file with all your conversations packed into one line. We help you turn that into something actually useful—individual chat files you can read, search, and use to build AI personas. Builder tier and above can import their 100 most recent conversations and continue them directly in just4o.chat.
Processing< 5 min
conversations.json
Max size200MB
Quick overview
5 steps to organized chats
- 1Export from ChatGPTSettings → Data Controls → Export. Download link emailed to you with images, audio, files, and all your chats.
- 2Find conversations.jsonSkip the images and audio—this one file has every conversation, title, and timestamp.
- 3Upload it hereWe'll parse the giant JSON and separate each chat into its own readable file.
- 4Download or create personasGet your chats as individual files or turn select conversations into AI personas.
- 5Import and continue your chatsBring your 100 most recent conversations into just4o.chat and pick up right where you left off.
Step by step
How to export and organize your ChatGPT data
ChatGPT's export includes everything—images, audio, files, and all your conversations in one giant JSON. Here's how to extract what matters.
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Find conversations.json
Unzip the download. The export includes images, audio, and other files—you only need conversations.json.
Usually 50-150MB for heavy users03
Upload it here
Drop your conversations.json file into the processor below. We'll separate each conversation into readable files.
All processing happens locally04
Download or create personas
Download your parsed chats as a zip file, or create persona summaries from selected conversations.
Personas work across all models05
Import and continue your chats
Import your conversations directly to your account and continue them with any AI model.
Requires Builder tier or above
In ChatGPT: Settings → Data Controls → Export data (download link emailed to you)
What's in the export?
Your ChatGPT data export, explained
When you export from ChatGPT, you get a zip file with a bunch of stuff. Here's what actually matters.
Your ChatGPT export folder—conversations.json is the one you need
conversations.json
This is what you need. Contains every conversation you've ever had with ChatGPT—titles, timestamps, and full message history. Usually 50-150MB for active users.
Images, audio, files
All the images you've uploaded, DALL-E generations, voice messages, and file attachments.
user.json
Basic account info—your account ID, email, subscription status, and birth year. Just metadata.
Other files
Chat history HTML files, shared links data. Useful for archival but not needed for migration.
Our processor only needs conversations.json. Upload that file and we'll separate it into individual conversation files you can actually read and use.
Processor
Upload your conversations.json
Drop your file below. We'll separate each conversation into its own file, and you can download them all or pick specific ones to build personas from.
Sign in to use the processor
What are personas?
AI personalities that remember your voice
Personas capture your communication style, tone, and preferences. Use them across all models in just4o.chat and they'll maintain your authentic voice.
How it works
Select specific conversations from your ChatGPT export and we'll analyze your writing patterns, communication style, and preferences. The result is a persona you can use with any AI model.
- Works across GPT-4o, Claude, Gemini, and Grok
- Remembers how you phrase things, your tone, your preferences
- Create different personas for different contexts—work, creative writing, coding
- Edit and refine your persona anytime
Ready to try just4o.chat?
Chat with GPT-4o, Claude, Gemini, and Grok—all in one place. Use your organized conversations to create personas, or just start fresh.