Free Code Snippet Beautifier Online
Format, beautify, and clean code in 11 languages. Auto-detect language, indent/dedent, comment/uncomment, sort lines, and more. 100% client-side — your code stays private.
How to Use the Code Beautifier
- Paste code into the input area on the left.
- Select the language or leave it on "Auto-detect".
- Click "Beautify" to format the code with proper indentation.
- Use Indent/Dedent to adjust indentation levels.
- Toggle Comment to add/remove line comments.
- Sort lines alphabetically or remove empty lines.
- Toggle Line Numbers for easier reference.
- Copy the formatted result to your clipboard.
Why Use This Code Beautifier
Messy, unformatted code is hard to read and debug. This beautifier instantly formats code from any source — copied from Slack, extracted from logs, or pasted from a colleague — into clean, consistently indented code.
With support for 11 languages and auto-detection, you don't need separate formatters for each language. The indent, comment, and sort tools make it a lightweight code editor for quick cleanup tasks.
Frequently Asked Questions
The tool analyzes syntax patterns like keywords, brackets, and string literals to identify the most likely language. You can always override the detection by selecting a language manually.
No. The beautifier only modifies whitespace (indentation, line breaks, spacing). It does not change variable names, string contents, or code logic. Your code will behave identically after formatting.
There is no enforced limit, but very large files (over 1MB) may cause browser slowdown. For optimal performance, process code in manageable chunks.
Use Cases
Cleaning Minified JS
Format minified JavaScript code to make it readable and debuggable when working with bundled or compressed scripts.
Code Reviews
Format code for code reviews to ensure consistent styling and make it easier for team members to read and understand.
Documentation Prep
Prepare code snippets for documentation by formatting them cleanly for inclusion in READMEs and technical guides.
Team Code Standards
Standardize team code style by beautifying code to match your project's formatting conventions and linting rules.
Debug Output
Format debug output and log messages to make them more readable during development and troubleshooting sessions.