Bracket / Parenthesis Checker
Check whether () [] {} <> are balanced and locate the first unclosed position, useful for debugging code or formulas.
How to use Bracket / Parenthesis Checker
- Paste code or a formula into the text box
- Click Check to see the result
- If there is an error it lists the exact position
Features
- Everything runs in your browser - pasted content never leaves your device
- No sign-up or login; open the page and use it, equally handy on mobile
- All processing is UTF-8 byte based, so Chinese text stays clean
FAQ
- Is this tool free?
- Completely free, no sign-up or login, unlimited uses.
- Will my data be uploaded?
- No. All computation runs locally in your browser; your input never leaves your device.
- How do I use it?
- Fill in the box above, click the matching button to get the result, then click Copy to take it away.
- Does it check HTML tags?
- This tool pairs bracket characters only and does not parse HTML structure; use a dedicated HTML validator for tags.