Convert Unicode to Lowercase

How to use Convert Unicode to Lowercase

1. 1. Paste the text to lowercase. Paste the Unicode text you want converted to lowercase. Accented and non-Latin letters are lowercased using their proper Unicode case mapping, not just the plain ASCII a-z range.
2. 2. See how each character is mapped. The tool applies Unicode-aware case folding to every character, so letters like É correctly become é instead of being left untouched the way a naive ASCII-only lowercase function would leave them.
3. 3. Copy the lowercased text. Copy the lowercased text and use it anywhere case-insensitive comparison or a consistently lowercase style is expected, such as a slug, a filename, or a search index.

When to use Convert Unicode to Lowercase

Convert Unicode to Lowercase lowercases text correctly across scripts, handling accented letters and non-Latin alphabets that plain ASCII lowercasing would miss. It matters whenever a naive toLowerCase in some environment mishandles characters outside the basic English alphabet.

• Normalizing user input with accents. A signup form collects names like François or José, and normalizing them to lowercase for a search index needs to handle the accented letters correctly, not just the plain ASCII ones.
• Building a case-insensitive slug. You are generating a URL slug from a title containing an accented word, and want the lowercase conversion to match the accented letter properly before further slug processing.
• Comparing two strings for equality. Two pieces of text differ only in case, including an accented character, and you lowercase both here first to confirm whether they are otherwise identical.
• Cleaning up inconsistent data in a spreadsheet. An imported spreadsheet mixes uppercase and lowercase entries with accented European names, and lowercasing the whole column first makes deduplication and sorting behave consistently.

Examples

CAFÉ

café

About the Convert Unicode to Lowercase tool

Frequently asked questions