Uppercase and lowercase converter
TextConvert text to uppercase, lowercase, title case, sentence case, camelCase, snake_case and kebab-case.
Your results
Convert between uppercase, lowercase, title, sentence, camelCase, snake and kebab.
Available modes
Each mode applies a different transformation: capitalisation change, word separation or reversing the order.
When to use each format
snake_case and kebab-case are used in code and URLs, camelCase in programming identifiers and Title case in visible titles.
Frequently asked questions
Answers to the most common questions about this tool.
What does this tool analyze or transform?
It processes the text you provide according to the selected function.
How is the result calculated?
It applies the counting or transformation rules described by the tool.
How should I use the result?
Use the result as an editing aid and review the final text in context.
Is my text stored?
Processing runs locally in your browser; the text is not sent away for analysis.
What text can I use?
Paste or type regular text; special formatting may need manual review.
Sources and methodology
Methodology: Text transformation
Applies string methods and regular-expression splits for upper/lower case and code-style formats.
Title and sentence rules are simplifications and do not cover every language.
Last reviewed
July 15, 2026