About this online online JavaScript formatter
hidevtool JavaScript formatter cleans up scripts copied from bundlers, console snippets, or legacy codebases. Paste JS, then beautify for review or minify for a shorter paste.
Formatting adds consistent indentation and line breaks; minify uses a real parser so syntax errors are reported instead of broken output.
Online JavaScript formatter capabilities
Pretty-print JavaScript
Format expands minified or messy code into indented blocks—functions, objects, and control flow on readable lines. Works on scripts, modules, and IIFEs when the syntax is parseable.
Minify JavaScript
Minify removes comments and unnecessary whitespace while keeping behavior the same. Invalid syntax fails with an error so you can fix the source first.
Common use cases
How do I format JavaScript online?
Paste your code into the input box and click Format. The tool indents functions, braces, and statements so you can read or debug the script more easily.
How do I beautify minified JavaScript from a bundle?
Paste the one-line snippet from a build or DevTools and run Format. Line breaks and two-space indentation are restored while logic stays the same.
How do I minify JavaScript online?
Click Minify after pasting valid JavaScript. Comments and extra spaces are stripped to produce a compact script you can copy.
Frequently asked questions
- How do I format JavaScript online?
- Paste your code into the input box and click Format. The tool indents functions, braces, and statements so you can read or debug the script more easily.
- How do I beautify minified JavaScript from a bundle?
- Paste the one-line snippet from a build or DevTools and run Format. Line breaks and two-space indentation are restored while logic stays the same.
- How do I minify JavaScript online?
- Click Minify after pasting valid JavaScript. Comments and extra spaces are stripped to produce a compact script you can copy.
- What is the difference between formatting and minifying JS?
- Formatting expands code for reading. Minifying compacts valid JavaScript to fewer characters without changing what it does.
- Why does JavaScript fail to minify?
- The parser hit a syntax error—missing bracket, bad arrow function, or truncated paste. Correct the code or format it first to spot the problem line.