About Prompt Bridge
Prompt Bridge is a free Chrome extension that carries AI conversation context across major AI platforms. It captures a full thread from ChatGPT, Claude, Gemini, Grok, or DeepSeek, compresses it into a shorter context pack, and drops it into another AI's input box. The tool launched this week and is built by a solo maker.
Review
Prompt Bridge addresses a specific workflow problem: re-explaining context every time you switch between AI assistants. The extension runs entirely in the browser, storing threads in IndexedDB and encrypting provider keys locally with AES-256-GCM. The maker states there are no servers, no telemetry, and no analytics; you can verify this by watching the network tab stay empty.
Key Features
- Capture: grabs a full conversation thread from ChatGPT, Claude, Gemini, Grok, or DeepSeek with three clicks.
- Compress: squeezes the thread into a tight context pack; the maker's last test reduced 12,400 tokens to 890.
- Bridge: drops the context pack into another AI's input box, with auto-detection when you switch tabs.
- Local-first storage: threads live in your browser's IndexedDB; provider keys are encrypted locally.
- Bring-your-own-key summarization: compression runs on your own provider key (OpenAI, Anthropic, Google, DeepSeek, xAI) and talks to those services directly.
Pricing and Value
Capture and Bridge are free forever. Summarizing requires your own provider API key and runs against that provider directly; you pay for your own usage. There is no account, no email wall, and no subscription tier. The maker has not defined any future pricing model.
Pros
- Works with five major AI platforms out of the box.
- No server-side processing means conversation data stays on your machine.
- Compression reduces token count significantly, which lowers API costs when you pay per token.
- Zero setup for the bridge step; it detects the target platform automatically.
Cons
- Summarizing requires a paid API key from one of the supported providers; there is no free summarization path.
- Chrome-only for now. Firefox support is on the roadmap but not yet shipped.
- Not well suited for teams or collaborative workflows; there is no sharing mechanism for context packs in the current version.
Prompt Bridge suits individual developers and researchers who regularly move between AI assistants and want to avoid re-pasting long threads. The local-first design is a practical fit for privacy-conscious users, though the need for your own API key adds a cost consideration. If you work mostly within a single AI platform, this tool won't add much value to your workflow.
Open 'Prompt Bridge' Website
Your membership also unlocks:
