FormatPaste
Auto Code Formatter
Paste code, let FormatPaste detect the language, and copy clean formatted output.
Output
formattedFree auto-detect formatter
Auto-detect and format code online
Use this auto code formatter when you want FormatPaste to detect the language for you. Paste JavaScript, TypeScript, JSON, HTML, CSS, Markdown, PHP, or YAML on the left and copy clean formatted output from the right.
Auto-detect language
Let FormatPaste choose the likely language before formatting.
Clean paste artifacts
Remove common copied-code problems such as line numbers and outer markdown fences.
Copy-ready output
Paste once, review the formatted result, and copy it back to your editor.
How this Auto Code formatter helps
Before and after formatting
Paste compact, copied, or hard-to-read Auto Code 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 Auto Code 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
Auto Code Formatter FAQ
How does auto formatting work?
Paste code into the input pane. FormatPaste checks common language patterns and formats using the detected language.
Can I override auto-detect?
Yes. Use the language dropdown to switch to JSON, JavaScript, PHP, CSS, YAML, Markdown, or another supported formatter page.
Is auto-detect always perfect?
No. If the code is ambiguous, choose the exact language from the dropdown for the most reliable formatting.
Is this auto code formatter free?
Yes. It is free to use for quick paste, format, and copy workflows.