Migrate & Audit Your Configs

Paste a legacy config and modernize it, or audit your current setup against best practices. Everything runs in your browser — your code never leaves your machine.

Choose a tool

ESLint

Legacy → Flat Config

Convert .eslintrc (JSON / CommonJS) to ESLint v9 flat config and audit deprecated rules.

Migrate ESLint config

Prettier

Audit & modernize

Detect deprecated options and review your Prettier config against current recommendations.

Audit Prettier config

TSConfig

Compiler options audit

Find deprecated TypeScript compiler options and missing recommended settings.

Audit tsconfig.json