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3 months ago
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Zero Server Code • Perfect for AI Generated apps
Simply drop in your HTML file; get localStorage data persistence & synchronization, and an instantly online web app in under 60 seconds.
LocalStorage is all you need!
Try it out now!
Drop your HTML file here and get an app immediately.
No sign-up needed! No backend needed!
Maximum file size: 10MB
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Skip complex AI builders, frameworks, servers, and databases by using localStorage as a database.
In three quick steps you'll have a web app that stores data locally and syncs across your devices.
Write yourself or ask your favorite LLM to generate your custom front-end only web app that saves data to localStorage.
Create a new 'App' by either uploading the file or copying its contents. No modifications needed! If it works in your browser, it will work everywhere.
Access your fully synced app under {slug}-{username}.htmlsync.io. You can even make it public so others can have read-only access to your app.
Why I Built This
I’m not usually a fan of letting large language models write production code, but they’re really good for fast personal apps. I’d open ChatGPT and say, “Create a single-file HTML app that saves data to localStorage…,” drop the file into my browser, and instantly my own custom habit tracker or budget tool was ready in minutes.
It felt wonderfully simple: no backend frameworks, no CI/CD pipelines - just an index.html and my imagination. The problem? Those little apps lived on one device. The first time I needed to access one from another device, I decided that these apps aren't useful without multi-device access.
That frustration sparked HTMLSync. Now you can drop any single-file HTML app into the platform, and it handles hosting, data storage and secure sync automatically. Your frontend is your entire stack, and your data follows you everywhere - no servers, no deployments, just ideas turned into reality.
— Tigran, Creator of HTMLSync
