HTMLSync
HTMLSync is a platform that enables users to instantly turn static HTML files into dynamic web apps with automatic data synchronization across multiple devices, requiring no backend code.
https://htmlsync.io/?ref=producthunt
Product Information
Updated:Aug 19, 2025
What is HTMLSync
HTMLSync is a specialized platform designed to host and synchronize AI-generated personal web applications. It provides a solution for developers and users who want to create and access custom web tools without dealing with complex backend infrastructure. The platform is particularly useful for single-file HTML applications that use localStorage for data storage, making it an ideal choice for those who generate simple web apps using AI tools like ChatGPT, Claude, or Gemini.
Key Features of HTMLSync
HTMLSync is a platform that allows users to turn static HTML applications into dynamic web apps with automatic data synchronization across multiple devices. It provides instant hosting and localStorage synchronization without requiring any backend code, making it particularly useful for AI-generated HTML applications. The service offers data persistence, multi-device accessibility, and secure data storage with a simple upload-and-use workflow.
Zero Server Code Implementation: Upload static HTML files and get a functioning web app without writing any backend code or managing servers
Cross-Device Synchronization: Automatically syncs data across multiple devices using localStorage, ensuring consistent access to your app's data everywhere
Public/Private Access Control: Flexible access control allowing users to switch between private mode (personal access only) and public mode (read-only access for others)
Local Data Storage: Provides up to 10MB of data storage per tool using browser's localStorage, keeping data secure and easily exportable
Use Cases of HTMLSync
Personal Productivity Tools: Create and host custom task managers, habit trackers, and focus timers with synchronized data across devices
Digital Journaling: Deploy personal journal applications with Markdown support and automatic syncing between desktop and mobile devices
AI-Generated Web Apps: Host and manage web applications generated by AI tools like ChatGPT or Claude with instant deployment and data persistence
Educational Tools: Create and share interactive learning tools or teaching resources with students while maintaining data consistency
Pros
No backend development required
Instant deployment and hosting
Data remains in user's control with easy export options
Simple and straightforward pricing model
Cons
Limited storage capacity (10MB per tool)
No support for media upload
Some advanced features only available in paid plans
Requires HTML files with inline CSS and JavaScript
How to Use HTMLSync
Create or prepare your HTML file: Create a single HTML file containing all code (HTML, CSS, JavaScript) inline. The app should use localStorage for data storage. You can use CDN links for external libraries.
Sign up for HTMLSync: Go to htmlsync.io and sign up using your Google account or create a new account. Choose between Free, Basic, or Pro plan based on your needs.
Upload your HTML file: Upload your HTML file (maximum 10MB) through the HTMLSync interface. No modifications to your code are needed if it already works in your browser with localStorage.
Get your app URL: After uploading, HTMLSync will generate a unique URL for your app in the format: {slug}-{username}.htmlsync.io
Set privacy settings: Choose between private mode (only you can access) or public mode (anyone with link can access in read-only mode)
Access across devices: Use your app's URL to access it from any device. Your data will automatically sync across all devices through HTMLSync's cloud sync feature.
Manage your app: You can modify privacy settings, update the HTML file, or delete the app through your HTMLSync dashboard at any time.
HTMLSync FAQs
Upload a single-file HTML application that saves data in local storage. You will receive an online URL for your app that you can access from anywhere with automatic data sync, no coding required.
HTMLSync Video
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