Code Snippet Formatter

How this formatter works

Detection runs first: the tool inspects your snippet’s brackets, tag structure, keywords and indentation pattern to guess whether it’s JavaScript, HTML, CSS, JSON, Python or SQL. You can override the guess anytime with the language dropdown.

JavaScript, HTML, CSS and JSON are formatted with js-beautify, the same engine used inside many editor extensions, so brace placement, wrapping and indentation follow well-tested conventions rather than improvised rules.

Python and SQL use a lighter, rule-based reformatter built for this tool — it normalizes indentation and keyword casing, but it is not a substitute for a real linter. For production Python formatting, pair this with black; for SQL, sqlfluff or your database client’s own formatter will catch things this tool can’t.

Nothing you paste leaves your browser. There’s no upload, no logging, and no account — the formatting happens client-side, which is also why very large files (10,000+ lines) may feel slower on older devices.

Supported languages