99xDev

99xDev is a web-based AI app builder made by the team at 99x that converts plain-language prompts into deployable full-stack web applications. It targets solo makers, founders, and agencies who want real, exportable code without local setup. The platform is actively live and featured on Product Hunt.

What It Is

99xDev is an AI-powered vibe-coding platform that generates React + Express + SQLite full-stack codebases from natural-language descriptions. Unlike tools that produce static prototypes, it produces a runnable project with a real backend, database migrations, and file storage — all managed inside a browser-based studio. Users can iterate with the AI agent through multi-turn chat, preview the running app live, and export the full codebase as a ZIP at any time.

How the Workflow Works

The platform follows a four-step flow described on the homepage:

• Describe: Write what you want in plain words (or paste a screenshot/image).
• AI builds: The agent writes code, runs migrations, wires up storage, and autofixes issues with live streaming progress in chat.
• Use the studio: Manage the database, files, and logs without leaving the workspace.
• Ship: Publish to a custom domain or download the full repo to self-host anywhere.

No local environment setup is required at any stage.

Studio Architecture

The built-in studio has four main tabs:

• Preview — live running app view with a shareable preview link.
• Code — full project file tree and editor showing the generated React + Express codebase.
• Database — table browser and read-only SQL console backed by SQLite with migrations.
• Prompts — a library of 18+ integration recipes (auth, Stripe, OpenAI, email, and more) that send a pre-written prompt to the agent in one click.

Per-project object storage for uploads, images, and files is also built in, so no external bucket or database service needs to be provisioned.

Target Audience and Use Cases

The homepage lists specific use-case landing pages for internal tools, dashboards, MVPs, founders, and agencies. The AI agent supports multi-turn building with clarifying questions and autofix, making it suited for non-engineers who want a working app as well as developers who want to skip boilerplate. Workspaces support team invites with owner, admin, and member roles.

No Lock-In Export Model

A key differentiator the site emphasizes is code ownership: users can download a standard React + Express + SQLite repository at any time and run it on a laptop, VPS, or cloud provider. Custom domain support lets users point their own hostname at a published app with DNS verification handled by the platform.