Turn every AI conversation into reusable local memory
Memdex is a Chrome extension that turns every AI conversation into reusable memory. It auto-captures your chats across ChatGPT, Claude, and Gemini, stores them encrypted on your laptop (IndexedDB, never uploaded), and underlines reusable context in your next prompt like Grammarly underlines typos. One click to inject when you need it just like grammarly. Free for your 10 most recent chats. Pro for unlimited.
Hey Product Hunt 👋
I'm Andrew. After spending most of last year jumping between ChatGPT, Claude, and Gemini, three things wore me down:
1. Every new chat starts at zero. I keep re-explaining the same project, the same constraints, the same voice.
2. My "memory" lives in someone else's cloud — locked to one model, invisible, unmovable.
3. The existing fixes are heavier than the problem: vector DBs, accounts, settings panels, prompts called /remember.
So I built Memdex.
Memdex is a browser extension that does three things, automatically:
• Saves every chat on ChatGPT, Claude, Gemini, Perplexity, and Grok to encrypted files on your laptop. Never uploaded, never trained on.
• Detects when something you already discussed is relevant to what you're typing now — like Grammarly, but for context.
• Injects that memory into any AI tool with one click. No copy-paste. No re-explaining.
The aha is the second tab: you open a fresh Claude window and it already knows your project, because last week's ChatGPT thread is on your disk and Memdex just pulled it in.
It's local-first (memory never leaves your machine), cross-model (one memory, every tool), and zero-ritual (no /remember, no DB, no signup to start). Free tier auto-saves your 10 most recent chats; Pro is unlimited.
👉 Add to Chrome: https://chromewebstore.google.co...
👉 Site: https://memdex.ai
What I'd love feedback on:
- Where "detect" feels noisy vs. genuinely useful
- Which tools you want next (Cursor, Windsurf, v0, Lovable are on the list)
- Anything that makes you not believe "local-first" — I want to fix the perception, not just the reality
Building in public from here — happy to answer anything in the thread.
— Andrew
About Memdex on Product Hunt
“Turn every AI conversation into reusable local memory”
Memdex launched on Product Hunt on May 23rd, 2026 and earned 174 upvotes and 22 comments, earning #2 Product of the Day. Memdex is a Chrome extension that turns every AI conversation into reusable memory. It auto-captures your chats across ChatGPT, Claude, and Gemini, stores them encrypted on your laptop (IndexedDB, never uploaded), and underlines reusable context in your next prompt like Grammarly underlines typos. One click to inject when you need it just like grammarly. Free for your 10 most recent chats. Pro for unlimited.
On the analytics side, Memdex competes within Productivity and Artificial Intelligence — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Memdex performed against the three products that launched closest to it on the same day.
Who hunted Memdex?
Memdex was hunted by Andrew chan. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Memdex including community comment highlights and product details, visit the product overview.
Andrew chan