night catstudio
ChatExtender
macOS

Keep the context.
Lose the endless thread.

ChatExtender carries your work across fresh ChatGPT and Claude chats. Search every synced conversation and keep the project memory you choose, privately on your Mac.

Get ChatExtenderRead the guides

$30 one-time purchase · 7-day free trial · macOS 13 or newer

ChatExtender continuing a long ChatGPT project in a fresh session
Pick up long projects without losing the thread.
A fresh ChatGPT session opening with the full context carried over
A fresh session opens with your full context.
ChatExtender memory panel with saved notes, files, and code attached to a Claude chat
Save context once. It rides along with every message.
ChatExtender searching every conversation for the word deadline
Search every conversation at once.

Memory that carries over

Start a fresh chat without starting over. Attach the notes, files, and context you choose, and pick up where you left off.

Search every conversation

Full-text search across your synced ChatGPT and Claude chats, from one Mac workspace.

Private by design

Conversations stay on your Mac. No ChatExtender account, no cloud uploads, and no subscription.

ChatExtender works alongside ChatGPT and Claude in their regular chat apps. It doesn’t replace them, and it isn’t built for coding agents.