Next.jsCRA → ViteJS → TSClasses → HooksTailwind

Migrate your codebase
in minutes, not days

AI-powered codemods for framework upgrades, language migrations, and architecture changes. You review the diff.

Start free migrationSee how it works

No credit card required

0 min

average migration

0%

changes automated

0+

files per project

5 migrations, one tool

Each migration has purpose-built detection, deterministic transforms where possible, and AI-powered changes for the rest.

Next.js 14Next.js 15
Async APIsCachingReact 19Config
Create React AppVite
Build configEnv varsImportsTests
JavaScriptTypeScript
Type annotationsInterfacestsconfig
Class ComponentsHooks
useStateuseEffectuseRefuseContext
Tailwind v3Tailwind v4
@themeCSS-first configPostCSS

Framework upgrades are
tedious, error-prone, and slow

Official codemods handle 40% of changes. AI assistants fix files in isolation without migration context. You end up reading docs and manually editing hundreds of files. MigrateBot understands the entire migration surface and applies every change with confidence scoring.

Watch a migration happen

page.tsx
Next.js 14
// app/blog/[slug]/page.tsx
 
export default function BlogPost({ params }) {
  const { slug } = params;
  const session = cookies().get("token");
  const lang = headers().get("accept-language");
 
  return <Article slug={slug} />;
}

How it works

01

Connect your project

Paste a GitHub URL or upload a zip. We detect the framework version automatically.

02

Review the migration plan

See every file that needs changes, grouped by category — async APIs, caching, config, tests, dependencies.

03

AI applies the changes

Deterministic transforms for config and deps. Claude for complex code changes. Every change gets a confidence score.

04

Download and review

Get a zip with your migrated code, a full report, and a checklist of items flagged for manual review.

Not another LLM wrapper

A purpose-built migration engine with hybrid AST + AI architecture.

Hybrid engine

AST-based detection to identify what needs to change. AI transformation only where deterministic rules aren't enough.

5 migration types

Next.js upgrades, CRA to Vite, JS to TypeScript, class to hooks, and Tailwind v3 to v4 — all from one tool.

Test migration

Your test files get migrated too. Jest mocks, Vitest config, and test utilities are updated automatically.

Confidence scoring

Every change is rated high, medium, or low confidence. You decide what to trust and what to review manually.

Real-time progress

Watch the migration happen file by file via server-sent events. No black box processing.

Full report

Migration report documenting every change, plus a manual review checklist for flagged items.

Simple pricing

Pay per project or go unlimited. A manual migration costs 4-8 hours of engineering time.

Start with a free migration (1 project, 5 files) — no credit card.

Single Project

$39

One project, one-time

  • Full codebase migration
  • Unlimited files
  • Download + report
Get started

Pro

$69/mo

10 projects per month

  • 10 project migrations/month
  • Priority processing
  • Full migration history
Subscribe

Scale

$99/mo

Unlimited projects

  • Unlimited migrations
  • Fastest processing
  • Priority support
Subscribe

Questions

What migrations are supported?

Next.js 14 → 15, Create React App → Vite, JavaScript → TypeScript, React class components → hooks, and Tailwind CSS v3 → v4.

Is my code secure?

Your code is processed in ephemeral containers and deleted immediately after migration. We never store your source code.

What if the migration isn’t perfect?

Every change includes a confidence score. Low-confidence changes are flagged in a dedicated manual review report.

Can I use this for private repos?

Yes — upload a zip file of your project. GitHub App integration for private repos is planned for v2.

How long does a migration take?

Most projects under 200 files complete in 2-5 minutes.

Stop dreading
framework upgrades

Start free migration