Biome
Biome project · Testing & QA
Rust-based formatter and linter for JavaScript, TypeScript, JSX, JSON, CSS and GraphQL that replaces Prettier and ESLint with one binary
MIT OR Apache-2.0Open sourceFreeLocalNov 2, 2026
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4 tools
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ESLint
OpenJS Foundation · Testing & QA
Pluggable static analysis tool for JavaScript and TypeScript that finds problems in code through configurable rules and can fix many automatically
MITOpen sourceFreeLocalNov 2, 2026
Prettier
Prettier project · Testing & QA
Opinionated code formatter for JavaScript, TypeScript, CSS, HTML, Markdown, YAML and more that reprints code from its syntax tree with few options
MITOpen sourceFreeLocalNov 2, 2026
Vitest
VoidZero / Vitest team · Testing & QA
Vite-native unit test framework for JavaScript and TypeScript with a Jest-compatible API, watch mode, coverage and browser mode
MITOpen sourceFreeLocalNov 2, 2026
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