FormatPaste
JavaScript Formatter
Paste JavaScript, format it automatically, and copy clean JS output.
Output
formattedFree JavaScript formatter
Format JavaScript online in a paste-and-copy workflow
Use this JavaScript formatter for messy snippets, minified functions, copied Stack Overflow code, AI-generated output, or code with accidental line numbers. The formatter runs immediately so the page is the tool.
Format JS snippets
Clean functions, objects, arrays, imports, callbacks, and modern JavaScript syntax.
Remove copied line numbers
Paste code copied from docs, chats, or screenshots and strip common line number artifacts.
Copy-ready JavaScript
Keep the flow simple: paste JavaScript, review formatted output, copy it back.
How this JavaScript formatter helps
Before and after formatting
Paste compact, copied, or hard-to-read JavaScript into the input pane. FormatPaste cleans common paste artifacts first, then formats the code into readable output that is easier to scan, debug, share, or copy into your editor.
Common JavaScript formatting use cases
Use it for quick snippets from documentation, AI chat output, Stack Overflow answers, config examples, API responses, old files, minified blocks, and code that picked up line numbers or markdown fences while being copied.
Safe paste reminder
FormatPaste is built for speed, but you should avoid pasting passwords, API keys, tokens, private keys, recovery codes, customer data, or other secrets into any online formatter. Use local tools for sensitive code.
More free online formatters
JavaScript Formatter FAQ
How do I format JavaScript online?
Paste JavaScript into the input pane and the formatted JS appears automatically in the output pane.
Can it format minified JavaScript?
Yes. It can expand compact JavaScript into readable multi-line code.
Can it remove line numbers from copied JS?
Yes. FormatPaste removes common leading line numbers before formatting.
Is this JS formatter free?
Yes. It is free to use for quick JavaScript formatting.