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Describe the web app
you want to build.

Studio writes the code. Check the result in the preview and ask for changes. When the app is ready, deploy it to runlot.

Download for macOSOpen on the web

Download for Intel Mac

macOS · Apple silicon or Intel

cafe-order · mainRunlot Studio

Build a cafe order screen. I'd like to store the menu in the database.

  • read src/App.tsx
  • write src/order/MenuList.tsx
  • run migrate — create menu and order tables
  • check run preview
Previewlive
Claude · my subscriptionNo credit chargedRunning in the background
How it works

From creating an app to deploying it

View the code and preview in the same workspace. The preview runs in your browser on the web, or on your own computer in the desktop app.

  1. 01

    Describe your app

    Enter what you want to build on the home screen. Studio names the app, creates a project, and starts writing code. There is no separate setup form to fill in.

  2. 02

    Check the preview

    Code changes appear in the preview without reloading the entire page. Review the result and ask for adjustments as you work.

  3. 03

    Deploy to runlot

    Click Publish to build the app, deploy a preview, and check it before deploying to production. These checks use a separate database branched from production.

Included features

A database and login are included

Your app deploys as a runlot project. There is no need to connect separate services for the database, login, or file storage.

Read the docs

PostgreSQL

Each project gets its own PostgreSQL-compatible database when its app first uses one.

Login

Implement email, GitHub, and Google sign-in with env.auth.

File storage

Upload files and make them public with env.storage.

Email

Send from your app's email address and handle incoming mail in the app.

Git repository

Changes from each request are committed to the project's Git repository.

Domains

Connect your domain. SSL certificates are issued and renewed automatically.

Manage logs, domains, members, and billing in the dashboard, linked from Studio. You can also query the database directly in Studio.

Connect a subscription

Use your Claude or ChatGPT subscription

Connect your Claude or ChatGPT account in the desktop app to write code using that subscription.

No runlot AI credit charged

Work handled by your subscription does not use runlot AI credit. The model picker shows no credit charged, and you can check your subscription's rolling 5-hour and 7-day usage limits.

Start without a subscription

You can use runlot-provided models without connecting an account. These models use AI credit. Connect a subscription later from the model picker.

Login details stay on your computer

Subscription credentials and API keys are stored in the OS keychain and are not sent to runlot's servers.

Keep running after the window closes

The app continues running in the background. Launch at login is enabled by default. Choose Quit from the menu to fully close the app.

Share a subscription

Use subscriptions on the web and in deployed apps

Keep the desktop app running to use your connected subscription in web Studio. You also choose whether to make it available to your team's deployed apps.

Use your subscription in web Studio

Select My desktop in the model picker at studio.runlot.io. Your connected desktop handles work requested from the browser using your subscription.

Use team subscriptions in deployed apps

Enable this feature for a project to handle its env.ai.run calls on a team member's Studio desktop without charging AI credit. You separately choose whether to switch to credit-funded models when no desktop is available.

Sharing a subscription with apps is off by default. The subscription owner enables it and selects the allowed models. App requests cannot access files on the computer. This feature supports anthropic/* and openai/* models.

Web and desktop compared

Work on the same project on the web and desktop

Code edits sync between the web and desktop apps. You can work with both open without moving files manually.

  • Access

    Web
    studio.runlot.io
    Desktop
    macOS app · Windows planned

  • Installation

    Web
    No installation needed
    Desktop
    Download and install

  • Project files

    Web
    In the browser
    Desktop
    ~/runlot/org/project

  • Preview

    Web
    Browser worker and PGlite
    Desktop
    runlot dev and PGlite

  • Model

    Web
    runlot-provided models or a connected desktop's subscription
    Desktop
    Claude or ChatGPT subscription, or runlot-provided models

Sign in with the same runlot account to access your organizations and projects on both web and desktop.

Build an app with Studio.

Install the desktop app or start in your browser.

Download for macOSOpen on the web

macOS · Apple silicon or Intel