What is 99xDev?

99xDev is an AI-powered app builder that generates full-stack web applications from plain-language descriptions. Instead of piecing together boilerplate code, you describe what you want, and the AI agent writes a complete React + Express + SQLite codebase, runs database migrations, sets up file storage, and even fixes issues as they arise. Every project includes a live preview, an integrated database browser, and the ability to download the full source code to self-host anywhere—no lock-in.

Who it's for

• Solo builders who want to prototype and ship full-stack apps without spending weeks on setup and configuration.
• Small teams that need a shared workspace with role-based invites to collaborate on multiple projects simultaneously.
• Developers exploring AI-assisted coding who want to see the agent write real, editable code and retain full ownership of the final product.

Key features

AI agent with live progress

The multi-turn builder streams code changes in real time as the AI writes, migrates, and debugs your app. You can ask clarifying questions, request changes, and watch the agent fix issues in the chat—no waiting for background jobs.

Built-in database and storage

Every project ships with SQLite and automatic migrations. You can inspect tables, browse rows, and run read-only SQL directly in the studio. Per-project object storage handles uploads, images, and files without connecting third-party services.

Downloadable code and custom domains

Export a standard React + Express + SQLite repo anytime and run it on your laptop, a VPS, or any cloud provider. When you're ready to publish, point your own hostname at the app, verify DNS, and 99xDev routes traffic while you keep building.

Integration prompts library

18+ drop-in recipes for auth, Stripe, OpenAI, email, and more. Search the library and send a prompt to the agent in one click—no manual wiring required.

What stands out

"You own what you build. Publish on your hostname or take the full stack anywhere—no lock-in."

Most AI app builders keep your code behind a paywall or force you onto their hosting. 99xDev gives you the full source code from day one, with SQLite migrations and a standard React + Express stack that runs anywhere. The built-in database and storage tools mean you can inspect data and manage files without leaving the studio, while the integration library lets you add common services with a single prompt. It's a rare combination of AI-assisted speed and developer freedom.

Worth checking out if…

You want to build full-stack web apps faster without sacrificing the ability to self-host or own the code. If you're tired of AI tools that generate black-box prototypes or lock you into proprietary platforms, 99xDev offers a transparent workflow where you can preview, edit, and export a real codebase. It's especially useful for solo developers and small teams who need to iterate quickly on dashboards, CRUD tools, or landing pages with backends—and want to keep full control of the final product.