Zero Server Code • Perfect for AI Generated apps
Supercharge your offline HTML apps with data sync & online access
Drop in your HTML file; get permanent storage, real-time sync,
and multi-device access in under 60 seconds.
Zero Server Code.
Check out the video demo!
Instant data sync for your HTML Tools
in less than 3 minutes
Skip complex AI builders, frameworks, servers, and databases. In three quick steps you’ll have a
single-file web app that stores data locally and syncs across your devices.
Generate
Ask your favorite LLM to generate your customized application. 'Generate a single-file HTML application, that saves data in local storage, which has the following functionality ...'
Customize
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.
Launch
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.
Free Offline Tools!
Explore our free offline tools. Turn them into syncable apps instantly!
Mindful Timer – Custom Duration, Smart Bells
Elevate your meditation practice with a beautifully animated timer that lets you dial in session length via an interactive conic-gradient wheel or one-tap presets from 5 – 45 minutes. Choose silent focus or interval bells with a drag-to-set slider, follow the gentle breathing animation, and pause or resume any time. A celebratory completion screen plus built-in session and minute counters keep long-term progress right in view.
Subscription Tracker – Monitor Recurring Costs
Stay on top of every Netflix, AWS, or gym bill with a smart tracker that lets you log subscriptions, set their billing cycle (monthly, yearly, weekly, or quarterly), tag by category, and add personal notes. Instant dashboards tally true monthly and yearly spend and show your active-subscription count, while category filters keep budgeting clear and effortless.
Breathing Coach – Guided Patterns, Custom Sessions & Ambient Sound
Master relaxation and focus with an interactive breathing app that pairs fluid circle animations and ripple effects with science-backed patterns such as Box, 4-7-8, Coherent, Triangle, and the Wim Hof method. Set your session length or go unlimited, pause/resume on the fly, and switch themes for sunset, forest, ocean, or purple vibes. A built-in synth engine delivers phase-matched inhale, exhale, and hold soundscapes, while a custom-pattern builder lets you craft & save your own rhythms.
Simple, transparent pricing
Choose the plan that's right for you
What's included
- 3 apps
- 10 MB data storage per tool
- Realtime multi-device sync
- Multi-user support
- Fine-grained access control
- Custom domain
What's included
- 100 apps
- 10 MB data storage per tool
- Realtime multi-device sync soon
- Multi-user support soon
- Fine-grained access control soon
- Custom domain soon
What's included
- 25 apps
- 10 MB data storage per tool
- Realtime multi-device sync soon
- Multi-user support
- Fine-grained access control
- Custom domain
Q & A
I am still not clear about how exactly the app works. Can you explain it to me?
You: upload a single-file HTML application, which saves data in local storage.
HTMLSync: generates a subdomain URL for your application, which you can access from anywhere.
Checkout our demo video to see how it works.
What kind of HTML files can I upload?
Upload standard HTML files with their CSS or JavaScript if they are self-contained or use CDN links. We enhance localStorage tools with cloud sync. All the localStorage related code should be in inline scripts and not CDN links.
What is included in the free plan?
The free plan allows you to create up to 3 programs, provides 10MB of storage.
Can I cancel my subscription anytime?
Yes, you can cancel your Pro subscription at any time. You keep access to Pro features until the end of the current billing period.