Which languages does the formatter support?

The Code Beautify workspace formats: HTML, CSS, JavaScript, TypeScript, TSX/JSX, JSON, Markdown, YAML, GraphQL, XML, and SQL (using sql-formatter). Python indentation cleanup is also supported. Most formatters use Prettier under the hood, so results match what you would get from running Prettier in your project.

Does this use the same rules as Prettier?

Yes for most languages — JavaScript, TypeScript, HTML, CSS, JSON, YAML, GraphQL, and Markdown are formatted with Prettier running in a Web Worker in your browser. The default options (2-space indent, single quotes, 80-char line width) match Prettier defaults. SQL uses sql-formatter with a separate rule set.

Will formatting change how my code behaves?

No. Code formatters only change whitespace, indentation, and line breaks — they never alter the semantics or logic of your code. The formatted output is functionally identical to the input.

Is my code kept private?

Yes. All formatting runs in your browser using Web Workers. Your code is never uploaded to a server. This means you can safely format proprietary source code, internal configuration files, or sensitive data.

Formatter & converter hub

Code Beautify

Beautify HTML, CSS, JavaScript, Python-style indents, SQL, and more below — then browse validators and converters in the catalog.

Everything runs in your browser on DevBench — no uploads.

Online beautifier

Format HTML, CSS, SCSS, Less, JavaScript, TypeScript, TSX, JSON, Markdown, YAML, GraphQL, XML, and SQL with Prettier / sql-formatter. Python uses indent normalization (4 spaces per depth).

Full JSON workspace

Language

Input

Output

Find more tools

Featured workspaces

JSON Beautifier & Validator

Format, minify, tree, fix errors

Open

Unix Timestamp Converter

Epoch ↔ local time

Open

JWT Decode & Verify

Headers, payload, signatures

Open

Text & Code Diff

Side-by-side compare

Open

Cron Expression Editor

Human-readable schedule

Open

API Tester

HTTP requests in browser

Open

Browse by category

JSON, XML & YAML

Encode & decode

HTML, CSS, Markdown & SQL

Text & strings

Crypto & security

Dev utilities

Images & PDF

Converters

Want filters on every tool? DevBench home lists all 146+ tools with category chips.

Code Beautify

Online beautifier

Find more tools

Featured workspaces

Popular tools

Browse by category

JSON, XML & YAML

Encode & decode

HTML, CSS, Markdown & SQL

Text & strings

Crypto & security

Dev utilities

Images & PDF

Converters

Online code formatter — Prettier in the browser

Supported languages

Why use a code formatter?