Code Beautifier & Unminifier Tool
Make minified code readable again. This beautifier reformats compressed HTML, CSS, JavaScript, and other code with proper indentation and spacing for easier editing and debugging.
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How Code Beautification Works
The beautifier (also called pretty-print or format) takes minified or poorly-formatted code and adds proper indentation, line breaks, and spacing. It transforms hard-to-read code into a clean, consistent structure.
For JSON, beautification is straightforward: parse the JSON, then re-serialize with indentation (typically 2 or 4 spaces). JavaScript beautification is more complex—the tool identifies code blocks, adds newlines after braces and semicolons, and indents based on nesting depth.
Before and after example:
Minified (1 line):
function calc(a,b) { return a+b; } const result=calc(5,3); console.log(result);Beautified (5 lines):
function calc(a, b) {return a + b;}const result = calc(5, 3); console.log(result);CSS beautification separates selectors from declarations, puts each property on its own line. HTML beautification indents nested elements and adds blank lines between major sections.
When You'd Actually Use This
Reading minified production code
You're debugging an issue with a third-party library. All you have is the minified file. Beautify it to understand the logic and trace the bug.
Reviewing copied code
Code from Stack Overflow or chat messages often has broken formatting. Beautify before pasting into your codebase to match your style.
Analyzing JSON responses
API responses come as single-line JSON. Beautify in your browser dev tools or with this tool to read nested structures and find specific values.
Preparing code for documentation
Documentation looks better with properly formatted code examples. Beautify snippets before adding them to README files or wikis.
Learning from obfuscated code
Studying how a library works? Beautification reveals the structure. You can then manually rename variables and add comments as you learn.
Fixing accidentally minified files
Your build process accidentally overwrote source files with minified versions. Beautify them as a temporary fix while you restore from git.
What to Know Before Using
Beautification doesn't fix syntax errors.If your code has missing braces or unclosed strings, beautification will fail or produce weird output. Fix syntax errors first.
Variable names stay the same.If the original code uses _0x4f2a or a, b, c, beautification preserves them. It only affects whitespace, not identifiers.
Comments may be lost.If beautifying minified code, comments are already gone. If beautifying formatted-but-messy code, comments should be preserved but might shift position.
Indentation is configurable.Choose 2 spaces (common in JavaScript), 4 spaces (traditional), or tabs. Match your project's existing style guide.
Important: Beautified code isn't the original source. It's a best-effort reconstruction. Don't trust it for critical changes—find the actual source if possible.
Common Questions
What's the difference between beautify and format?
Same thing. Different tools use different names. Prettier calls it "format", Chrome DevTools calls it "pretty print", this tool calls it "beautify".
Can beautification break my code?
No, it only changes whitespace. However, if the beautifier misunderstands the syntax (e.g., template literals in JS), it might format oddly. Always verify the output works.
Why does my beautified JSON have extra blank lines?
Some beautifiers add blank lines between object properties. This tool uses standard JSON.stringify with indentation—no extra blank lines, just clean formatting.
Should I commit beautified code?
Yes, if your team uses beautification as part of the workflow. Better yet, use an automated formatter (Prettier, eslint) that runs on save or commit.
Can I beautify multiple files at once?
This tool handles one file at a time. For batch processing, use command-line tools: prettier --write "**/*.js" or IDE features like "Format Document".
Does beautification work on obfuscated code?
It adds formatting but doesn't undo obfuscation. Variable names like _0xabc stay cryptic. The structure becomes readable, but understanding the logic still requires manual analysis.
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