Code Beautifier
Beautify JS, TS, JSX, TSX, JSON, CSS, SCSS, Less, HTML, Vue, Markdown, YAML, XML, SVG, GraphQL, and SQL
Format messy code into readable structure
Pretty-prints your source with consistent indentation and wrapping. Everything runs locally in your browser — nothing is uploaded. For languages that are not supported yet, see the FAQ below.
Prettier (Babel) — opinionated JS formatting.
About this code beautifier
Format source code from a language dropdown with options such as print width, tab width, tabs vs spaces, semicolons, and quote style. Paste or upload up to 5 MB, click Beautify, then copy or download the formatted output—all in the browser.
How to use
- Select the language that matches your code.
- Adjust print width, tab width, tabs/spaces, semicolon, and quote preferences as available.
- Paste code or upload a file (5 MB max).
- Click Beautify, verify the layout, then Copy or Download.
Formatting vs linting
Beautification rewrites spacing and line breaks for readability. It does not fix logic bugs, type errors, or security issues. Different formatters may disagree on wrapping or trailing commas—align options with your team’s style guide when possible.
Common uses
- Clean up pasted stack traces or generated code before review.
- Normalize indentation when merging snippets from different editors.
- Preview how a formatter treats long lines with a given print width.
Tips
- Wrong language selection often yields parse errors—match the dropdown to the syntax.
- Tabs vs spaces should match project conventions to avoid noisy diffs.
- For CI-enforced style, prefer the same formatter version your pipeline uses when available.
Privacy
Your code is formatted locally. ToolsArk does not upload source for beautification.
Limitations
- Supported languages and options depend on the bundled formatter for each entry.
- 5 MB file size limit; not a substitute for IDE or repo-wide format-on-save.
- Some valid but unusual syntax may fail to parse and will not be partially formatted.
Frequently asked questions
Common questions about the Code Beautifier.
What does the Code Beautifier do?
It pretty-prints source with production-grade formatters that run entirely in your browser. Prettier handles most web languages; sql-formatter handles SQL. Nothing is uploaded to ToolsArk servers.
Which languages are supported?
JavaScript, TypeScript, JSX, TSX, JSON, CSS, SCSS, Less, HTML, Vue, Markdown, YAML, XML, SVG, GraphQL, and SQL. Engines load on demand so unused languages do not inflate the first page load.
Which languages are intentionally not supported?
Python, Go, Rust, C/C++/C#/Java, Dart, PHP, Ruby, Shell, Kotlin, and Swift are omitted in v1. Reliable browser ports need large WASM toolchains (or do not exist yet). We document the gap instead of shipping partial formatters.
Which formatter libraries does ToolsArk use?
Prettier standalone with official language plugins, the official @prettier/plugin-xml for XML/SVG, and sql-formatter for SQL. All run client-side with no external API calls.
Does my code leave my device?
No. Formatting happens locally in your browser. ToolsArk does not receive your source for beautifying.
Why did formatting fail?
Usually the input has a syntax error the selected parser cannot accept. Fix the reported error, confirm the language matches the code, and try again.
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