Input example
function greet(name){
console.log(name);
}JavaScript beautifier
Beautify JavaScript Online
Beautify JavaScript online for copied functions, browser snippets, Node.js examples, and frontend code blocks. The formatter runs locally in your browser, so you can clean copied snippets quickly without creating an account.
Beautify JavaScript nowBeautifier tool
Paste or upload JavaScript content to beautify it
Use the input field for minified, messy, or copied content. Select Beautify to generate a cleaner version you can copy or download.
Paste or upload content, then select Beautify.
Beautified preview will appear here.
When to use this JavaScript beautifier
Use this JavaScript beautifier for browser snippets, Node examples, copied functions, event handlers, or short code blocks that need readable indentation. It is useful before comparing two snippets or explaining a change to another developer. The goal is not only to make the content look cleaner, but to make parent blocks, nested values, and repeated sections easier to inspect before you save or share the result.
Beautifying content is especially helpful before running a comparison. When indentation and line breaks are consistent, real changes are easier to find and formatting noise is less distracting.
Example
Beautify JavaScript Online example
This before-and-after example shows how the beautifier turns cramped content into a more readable structure.
Output example
function greet(name){
console.log(name);
}Review checklist
Common mistakes to avoid
Using it for large production bundles instead of a real build tool
Check this before copying the beautified result into a project, sending it to another person, or using it as the baseline for a file comparison.
Formatting code that has syntax errors without reviewing the result
Check this before copying the beautified result into a project, sending it to another person, or using it as the baseline for a file comparison.
Leaving access tokens, analytics keys, or private endpoints in shared snippets
Check this before copying the beautified result into a project, sending it to another person, or using it as the baseline for a file comparison.
Privacy and local browser processing
This JavaScript beautifier runs in your browser with client-side JavaScript. You can paste text or upload a file without creating an account. Share links may include the content you entered, so only create or send a link when the content is safe for the recipient to view.
For private work, remove passwords, API keys, access tokens, personal data, customer records, private URLs, and internal identifiers before using any online utility.
FAQ
Beautify JavaScript Online FAQ
Does beautifying change the meaning of my content?
The intent is to change spacing, indentation, and line breaks while preserving the same content. Always review the output before using it in production or sharing it with another person.
Can I collapse large parent blocks?
Yes. The beautified preview includes plus and minus controls for parent blocks so you can collapse or expand nested sections while reviewing the output.
Can I download or share the beautified result?
Yes. Use Download output to save the formatted content or Share link to copy a link containing the current input and output.