How it works
- Input. Paste your content or drop a supported file.
- Options. Adjust the options for the result you need.
- Process. Run the tool, then copy or download the result.
Compare and format
Lowercase
Convert text to lowercase.
TXT, CSV, TSV, JSON or MD · UTF-8 · up to 10 MiB. Each input, including files: up to 500,000 code points.
0 characters0 lines
0 characters
Compare and format
How it works: Lowercase
Convert every letter to lowercase using language-aware browser rules while leaving the rest of the text unchanged.
Input → Result
Input
A GUIDE TO CSV DATA
Result
a guide to csv data
Common uses
- Normalize usernames and tags
- Prepare case-insensitive comparisons
- Clean mixed-case imports
Formats and limits
- The active page language controls case conversion. Do not use lowercasing to validate identifiers, URLs or addresses.
- Some writing systems use context-sensitive mappings. Check names, acronyms and brands in the result.
2026-10-07