Fireproof – local-first database with Git-like encrypted sync

In plain words

Fireproof is a local-first database for web applications that stores data on users' devices and syncs changes using Git-like encrypted protocols, eliminating reliance on cloud servers. Built for JavaScript developers, it enables faster frontend development by handling live synchronization at the browser level. The database leverages modern web APIs like Passkeys and Origin Private Filesystem to provide embedded database functionality previously unavailable to web applications.

written from the facts on this page · September 2026

From the sources

🔥 The quickest way to bring live data to your app.

Runs in the browser, fits in the context window, and syncs anywhere. LLMs.txt is a universal way to share prompts — ours is designed for one-shot success . Paste it into any AI code generator along with something like “an inventory tracker for my bakery.” Write your app first, choose your backend later. Getting started is as easy as adding a script tag or running npm install use-fireproof in your project. Experience live updates across peers so everyone can collaborate together, using your existing backend. Try the React or Solid tutorials, open the code pen above , hack on this HTMX example , or check out these open-source starters: Get started using Fireproof with…from fireproof.storage

In the maker’s words, at launch

Hi, HN! As a cofounder of Couchbase, I pioneered mobile sync, and I’ve always wanted to bring the speed and reliability of local-first data to the web, incubating PouchDB among other efforts. I learned the constraints of real world financial applications at McKinsey & Company FinLab, and Merkle integrity research at…

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