AI web app builder
How to use
v0.
Turning product ideas, screenshots, and requirements into responsive web interfaces and incremental full-stack applications.
v0 is a AI web application builder from Vercel. Turning product ideas, screenshots, and requirements into responsive web interfaces and incremental full-stack applications. This guide covers the whole path in one place: official access, a first session that produces something reviewable, the checks that make output trustworthy, and the permissions worth limiting before you connect real work.
AI should make the work easier to inspect. If the workflow removes the source, the owner, or the review step, redesign the workflow.
Access & setup
Find, install, and sign in to v0
Get into the official v0 experience with the right account and a setup you understand.
- 01
Start at https://v0.dev/ and confirm the domain before entering account or payment information.
- 02
Availability: Web application connected to a Vercel account; generated projects can integrate with Git and deploy to Vercel.
- 03
A modern browser, internet connection, and Vercel account. Full-stack features may require connected services, environment variables, and usage-based plans.
- 04
Sign in with the account you intend to keep using, then review plan, data, notification, and permission settings.
- 05
Run one low-risk test task before connecting sensitive files, repositories, or workspace data.
- Use official download pages.
- Review permissions during setup.
- Keep installers and applications updated.
First session
Your first useful v0 session
Learn the interaction loop using a small task with a clear outcome.
- 01
Start a project with the user, primary flow, visual direction, stack constraints, and exclusions.
- 02
Ask for a plan, then generate the smallest complete interface with realistic content.
- 03
Test the preview at target breakpoints and correct structure before adding backend behavior.
- 04
Inspect generated code, accessibility, dependencies, and deployment settings before publishing.
- State the outcome before the background.
- Provide the real source material.
- Review the result before expanding the task.
Quality control
Check the quality of v0 output
Turn generated code into a change you would put your name on in review.
- 01
Restate the intended behaviour and the acceptance criteria before reading a single generated line.
- 02
Read the diff rather than the chat summary; the summary describes intent, the diff describes what actually changed.
- 03
Run the test suite, then write a test that would fail if the change were wrong, and confirm it passes for the right reason.
- 04
Check the edges the model tends to skip: error paths, null and empty cases, concurrency, and migration or rollback behaviour.
- 05
Trace every new dependency, network call, and file write, and confirm each one is genuinely required.
- Review the diff, never the description of the diff.
- A passing test suite proves the tests pass, not that the change is correct.
- Keep changes small enough that a human can actually review them.
Privacy & permissions
Use v0 safely
Give the tool enough repository access to help, and no more than that.
- 01
Decide what the tool may read and what it may write before connecting a repository.
- 02
Scope tokens and integrations to the narrowest repository, branch, and permission set that still works.
- 03
Keep secrets out of the context window: use environment variables and secret stores, never inline credentials.
- 04
Require review before generated code touches authentication, payments, permissions, migrations, or deletion paths.
- 05
Audit what the integration retained after the session, and revoke access that is no longer needed.
- A polished preview does not prove authorization, security, accessibility, or production readiness. Keep secrets server-side, test failure states, and review generated code and dependencies.
- Follow your organisation's approved-use policy.
- Never treat fluent output as authorization to act.
Core workflows
Step-by-step ways to use v0 for the work it does best.
Each workflow below has its own outcome, steps and review checkpoints.
Move from requirements to a testable interface through small, deliberate generations.
↓ 02 WorkflowAdd data and deploy a v0 application safelyConnect a generated interface to backend services while keeping secrets, access, and releases controlled.
↓Workflow 01
Turn a product brief into a working v0 prototype
Move from requirements to a testable interface through small, deliberate generations.
Outcome: Create one complete product flow that can be evaluated with realistic content.
- 01
Write the user, problem, primary flow, content, constraints, and explicit exclusions as a short brief.
- 02
Ask v0 for a page and component plan before generating implementation code.
- 03
Build the visual shell first, using realistic copy and the required desktop and mobile states.
- 04
Add interactions one at a time and test loading, empty, error, and permission states in the preview.
- 05
Review accessibility, responsiveness, dependencies, and generated code before sharing the prototype.
What good use looks like
- One primary flow per iteration.
- Use real content early.
- Review code as well as pixels.
Workflow 02
Add data and deploy a v0 application safely
Connect a generated interface to backend services while keeping secrets, access, and releases controlled.
Outcome: Publish a working application with a reviewed data model and a recoverable deployment path.
- 01
Define the entities, ownership rules, operations, and failure cases before adding an integration.
- 02
Connect the required database or service through project settings and keep secrets in environment variables.
- 03
Implement authentication and server-side authorization before exposing create, update, or delete actions.
- 04
Test with separate users and malformed inputs, then inspect the generated server routes and database rules.
- 05
Publish a preview first, review logs and behavior, and promote to production only with a rollback point.
What good use looks like
- Never expose private keys to the browser.
- Test authorization, not only login.
- Use preview deployments for review.
Official references
Check the current product documentation.
Features, plan limits, availability, and data controls change. These official pages are the starting points used for this guide.