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Case Converter

Change text case using the language of your text, with undo.

Workspace⌁ Processed on your device

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How it works

Paste text, choose its language and the desired letter case, then convert. Copy or download the result; Undo returns the original text.

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Example

a short title → A Short Title
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When to use this tool

Convert a heading to lowercase while keeping its accents.

Supported formats & limits

Up to 1 million UTF-16 code units; comparisons: 200,000 per side. Visible characters use Unicode grapheme segmentation. Reading and speaking times are estimates. Your original input remains available.

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Good to know

What happens when I change the input?

An edited input needs a new result. Run the action again; previous download links are removed so you cannot mistake an old output for the current one.

Are my files uploaded?

Your files and pasted content are processed in temporary browser memory and are not uploaded for processing. App preferences store only tool IDs, language and theme. There are no accounts, ads or automatic error reports. Closing the page discards your workspace; download results you want to keep. Production pages use Google Analytics for visit statistics; see the Privacy page for details.