Biome formatter now claims 96% compatibility with Prettier's output across JavaScript, TypeScript, and JSX—swap v1.4.0 in for drop-in parity on most codebases.
June 18, 2026
Summary
Closing the last 11% gap (from 85% to 96%) dramatically reduces friction for teams migrating from Prettier: large monorepos that saw 6,000+ diagnostics now report ~200 remaining divergences. Formatter consistency removes adoption friction that stalls early adopters.
Why it matters
Closing the last 11% gap (from 85% to 96%) dramatically reduces friction for teams migrating from Prettier: large monorepos that saw 6,000+ diagnostics now report ~200 remaining divergences. Formatter consistency removes adoption friction that stalls early adopters.
Implementation verdict
Drops in as a Prettier replacement via `npm install --save-dev --save-exact @biomejs/biome@1.4.0`. New options (bracketSameLine, bracketSpacing, lineEnding) close remaining formatting gaps. Worth testing now on projects where Prettier incompatibility was the blocker; the test infrastructure is solid enough to catch regressions. VSCode extension now ships unbundled, allowing independent version selection.
Sources
Dev Signal
Get briefs like this in your inbox — free, every weekday.
100+ sources compressed into one 4-minute read. Ranked, cited, implementation-ready.