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Case Converter

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Text & Writing

Case Converter

Convert text between uppercase, lowercase, title case, and sentence case.

Workspace

Run the tool here

Browser utility

Input

Case style

Output

Run the workspace to see the response here.

How to use

Paste the text.
Pick the case style.
Copy the converted text.

About this tool

Switch text between UPPERCASE, lowercase, Title Case, Sentence case and tOGGLE case.

Case Converter is part of the TmpMailer Text & Writing set — free browser utilities that open instantly, need no account, and pair well with a temporary-email workflow when you just need a quick result.

Common use cases

Normalising headings from a spreadsheet.
Fixing accidental caps-lock text.
Formatting product names consistently.

Common questions

Does Title Case follow style guides?

It capitalises each word. Editorial style guides differ on small words such as “of” and “the”, so adjust manually if needed.

Will it change accented letters?

Case mapping handles most Latin accents. Some scripts have context-sensitive casing.

Can I convert only part of the text?

Paste only the part you want to change, then recombine it.

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