Convert
Case Converter
Convert text between common case styles.
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Basic
What it is & how to use it
Case conversion standardises strings for titles, codes and campaign naming (including UTM hygiene).
How to use the Case Converter
1) Paste text.
2) Pick a case style.
3) Copy the result.
4) Prefer lowercase for analytics parameters.
Intermediate
Formula & worked example
Upper/lower map characters; title case capitalises words by simple rules (language exceptions exist).
Example: HELLO world → Hello World (title) or hello world (lower).
Advanced
Interpretation, edge cases & next steps
Title case libraries disagree on small words.
Advanced: for UTMs always lowercase; do not case-fold languages you have not tested.
Frequently asked questions
Perfect title case?
Simple rules — verify brand style guides.
Unicode?
Yes in modern browsers; locale edge cases exist.
For UTMs?
Use lowercase consistently.
Code identifiers?
Prefer dedicated lint rules for camelCase/snake_case in repos.
Stored?
Text stays local to the session.
Deep guide
Read the full guide
Longer teaching, worked scenarios and mistakes — then jump back into this tool with example numbers.