Code Beautifier
Format and minify HTML, CSS, JavaScript, XML, YAML and SQL in your browser.
How it works
- 1
Paste your code into the input panel.
- 2
Select the language tab and choose Format or Minify.
- 3
Copy or download the result.
What a formatter may touch
- Only whitespace outside tokens: comments, indentation and newlines are re-laid out; string contents are byte-for-byte sacred.
- JavaScript’s automatic-semicolon traps (a return followed by a newline) are guarded so re-indenting cannot change behaviour.
- JSON mode re-indents strictly by depth; JS mode also normalises braces — pick per language instead of running one on the other.
Pretty-printing that never changes meaning
Six languages, one page
HTML, CSS, JavaScript, XML, YAML and SQL share one clean interface.
Instant local processing
Formatting and minification happen immediately in your browser.
Copy or download
Grab the result to the clipboard or save it with the correct extension.
Frequently asked questions
Does it validate syntax?
It reformats the text. It does not guarantee the code is syntactically valid.
Can I format large files?
It works well for typical snippets and medium-sized files. Very large files may lag.
Is my code kept?
No. Everything is processed locally and never uploaded.
✦ What is Code Beautifier?
A code beautifier takes packed or hand-mangled source and re-lays it so humans can read it: one construct per line and nesting shown by indentation, with a matching minifier that squeezes the same code back down for shipping. This tool carries six independent formatters instead of one fuzzy printer, covering HTML, CSS, JavaScript, XML, YAML and SQL, each aware of real-world quirks like quoted-attribute edge cases. Paste into the left pane, pick the language tab, then format or minify into the right pane and copy or download the result with its proper file extension.
Six small parsers instead of one fuzzy printer
- HTML that respects void elements, keeps script and style bodies intact, and leaves pre and textarea whitespace untouched
- CSS that treats quoted values as opaque runs, so punctuation inside strings never splits declarations
- JavaScript tokenizing that tells regex literals apart from division and keeps comments and template strings whole
- XML with well-formedness checks for mismatched or unclosed tags, plus CDATA, comments and doctype handled as blocks
- YAML re-emitted as clean two-space structure, plus SQL keyword uppercasing with major clauses on their own lines
A normal tidy-up session
- Dropping a minified snippet or generated dump into the input and reading the structured output
- Choosing 2-space, 4-space or Tab indentation before copying the result
- Minifying before deploy, or loading a per-language sample
Rough edges worth knowing
The JavaScript formatter works at layout level rather than full language semantics, so exotic syntax may indent conservatively. YAML flow values with bare keys are normalized on a best-effort basis, and SQL follows the common clause list rather than every vendor dialect. Errors surface as plain messages in the output pane, so an empty result always deserves a look at the input, not a retry of the button.
Privacy: pasting, formatting and minifying never leave the tab; your source is processed on-device and vanishes when you clear the boxes or close the page.
Last updated · 2026-09-01
📚 Formatting styles and what they mean for your diffs
Beautified code is only useful if the whole team formats the same way — otherwise every format commit buries real changes in noise.
| Choice | Options | Advice |
|---|---|---|
| Indent | 2 spaces / 4 spaces / tab | Match your project's existing style; 2 dominates modern JS |
| Braces | K&R (same line) / Allman (new line) | K&R for JS-family; Allman survives in C#/SQL |
| Quotes | single / double | Pick one; JSON always needs double |
| Semicolons | required / omitted | ASI works, but explicit semicolons diff cleaner |
Workflow that works: beautify to READ (debugging a minified bundle), minify to SHIP. Formatting a minified file then re-minifying is safe; formatting then committing without an agreed style is how diff noise is born. XML note: attribute order is preserved, so attribute-heavy markup stays stable. SQL note: keyword casing (UPPER vs lower) is pure convention — pick and keep it.
Last updated · 2026-09-01