Uppercase / Lowercase

Convert text case while respecting the language (locale).

Converter

Text

Result

Available actions

Each option transforms the text in a specific way. Here is what each action does.

UPPERCASE

Converts all letters to uppercase according to the language (locale). Example: “été” → “ÉTÉ”.

lowercase

Converts all letters to lowercase according to the language (locale). Example: “ÉTÉ” → “été”.

Invert case

Inverts case letter by letter: an uppercase becomes a lowercase and vice versa. Characters without case (numbers, emojis, punctuation, scripts without case) remain unchanged.

Sentences

Applies sentence case: everything to lowercase, then uppercase at the start of each sentence (after “.”, “!”, “?”, “…” or a line break). Useful to clean up messy text.

Title

Applies Title Case: the first letter of each word becomes uppercase. This is a simple generic version—typographic rules may vary by language.

Examples

Click an example to prefill the text and test an action.

Back to the “Text Case” section

Use case

Correct a text 'SHOUTING'Transform text written in UPPERCASE to lowercase or sentence case to make it readable.
Standardize titlesPut titles in title case or sentence case according to conventions.
Clean up copied textReformat content coming from a PDF, an export, or a tool that breaks formatting.
Prepare dataPut a list (names, emails, tags) in a consistent case before importing into a spreadsheet or CRM.
Development and sluggingStandardize identifiers, constants, labels, or text fragments according to a desired case.
Avoid presentation errorsApply consistent case in documents, resumes, or presentations.

What you get

The text converted to the chosen case (uppercase, lowercase, title, sentence, etc.), ready to be copied and pasted.

A quick transformation that preserves content: only the characters (case) change, not the words.

A handy tool to standardize texts without going through an editor or a series of manual replacements.

Limits and points of attention

Title case may depend on linguistic rules (words to leave in lowercase, exceptions), which vary by conventions.
Acronyms (e.g., 'API', 'HTML') may require manual correction after conversion.
This converter changes the case, not punctuation or spelling.

Frequently asked questions

What is the difference between 'sentence case' and 'title case'?

Sentence case capitalizes only the first letter of a sentence. Title case capitalizes the important words of a title.

Does the tool change accents or special characters?

No: it preserves characters (accents included) and only changes the case.

Can I convert a list with line breaks?

Yes, the tool works on multi-line text (lists, paragraphs, copied columns).

Why do some words (e.g., acronyms) not appear as I want?

Acronyms and linguistic exceptions are not always automatically detected: manual adjustment may be necessary.

Tip

For a clean result, first convert to lowercase, then apply the desired case (sentence or title): this avoids irregularities from already poorly formatted text.