Your AI conversations should not be locked inside one provider export. just4o.chat gives you separate migration paths for OpenAI ChatGPT and Anthropic Claude, so you can bring the conversations, memories, and project context that still matter.
OpenAI conversations.json
Anthropic data export zip
Each importer has its own working page, selection UI, and source-specific limits.
Use the OpenAI data export to bring selected ChatGPT conversations into just4o.chat. The importer reads conversations.json, lets you choose which chats to keep, and imports up to 100 OpenAI chats without counting against your Anthropic chat allowance.
Use the Anthropic data export zip as a one-step Claude importer. just4o.chat reads the export, lets you choose conversations, memories, and projects, then imports up to 100 Anthropic chats, 50 Claude memories, and 5 Claude projects.
The OpenAI migration path is built around conversations.json, the file inside a ChatGPT data export that contains your chat titles, timestamps, and message history. After upload, you can review and select the chats you want to import before anything is written to your account.
The Anthropic migration path reads the full Claude export zip. It can surface real conversation history, Claude memory candidates, and project records, then lets you decide which pieces belong in just4o.chat.
OpenAI imports: up to 100 selected ChatGPT conversations.
Anthropic imports: up to 100 selected Claude conversations.
Claude memory imports: up to 50 selected memories, filtered before saving.
Claude project imports: up to 5 selected projects when the export includes usable project records.
If you have a ChatGPT export, use the OpenAI importer. If you have the Claude zip from Anthropic, use the Anthropic importer. Both pages are built to keep selection in your hands before import.
