Uppercase to Lowercase
Convert UPPERCASE text to lowercase online. Unicode-aware, keeps numbers, punctuation and line breaks intact, and runs entirely in your browser. Free.
- No upload — 100% private
- Instant, on your device
- Free, no sign-up
- Works offline once loaded
How it works
How to use Uppercase to Lowercase
Paste your uppercase text into the input box.
The lowercase version appears instantly in the output pane.
Copy it, download it, or pick another case style from the grid.
Why use it
Why use our Uppercase to Lowercase tool
Unicode-aware lowercasing
Uses proper Unicode rules, so “ÉCOLE” becomes “école” and Greek or Cyrillic text converts correctly.
Great for cleaning data
Normalise email lists, tags, usernames or CSV columns to lowercase before comparing or de-duplicating them.
Line by line
Long lists keep their line breaks, so each entry stays on its own line after conversion.
Private and instant
Nothing is uploaded — conversion happens on your device as you paste.
FAQ
Frequently asked questions
Why convert text to lowercase?
Lowercase is the safest form for comparing values like emails, tags and file names, and it’s easier to read than long passages in all caps.
Is this the same as the programming toLowerCase() function?
It gives the same result as JavaScript’s toLowerCase() for normal text, without needing to write any code.
Can I convert lowercase back to uppercase?
Yes — click UPPERCASE in the mode grid, or use the Lowercase to Uppercase page.
Is there a size limit?
No fixed limit. Whole documents and lists with thousands of lines convert instantly because nothing is sent to a server.
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