Constant Case Converter
Convert headings, labels, and identifiers into readable CONSTANT_CASE locally.
A QUICK WALKTHROUGH
How to use this tool
- Paste up to 100,000 characters.
- Convert the text into uppercase underscore-separated words.
- Copy the result.
Unicode word boundaries
Word-like segments come from Intl.Segmenter when available, with a Unicode letter and number fallback. Punctuation and whitespace become separators.
Predictable scope
Every detected word is uppercased with the browser Unicode mapping and joined with underscores. Acronyms and language-specific naming rules are not inferred.
GOOD TO KNOW
Common questions
Are symbols preserved?
No. Symbols and punctuation separate words and are omitted.
Does this upload text?
No. Conversion runs locally.