小写转换器
在线将文本转换为小写 — 即时、免费、私密。您的文本绝不会离开浏览器。
What is lowercase text?
Lowercase text uses small letters (a, b, c) instead of capital letters (A, B, C). 转换ing text to lowercase is one of the most common text operations: it normalizes data before sorting or searching, fixes CAPS LOCK accidents, and prepares text for URLs, emails, and database lookups where case matters.
This free lowercase converter runs entirely in your browser. Paste any text — a paragraph, an essay, a list, or a whole document — and every uppercase letter is converted to lowercase instantly. There is no upload, no signup, and no limit: your text never leaves your device.
使用方法 use the lowercase converter
- Paste or type your text into the box above — the result updates live as you type.
- Click 转换 to Lowercase (or just keep typing — conversion is automatic).
- 复制 the result with one click and check the character count.
Frequently asked questions
What does converting text to lowercase mean?
Lowercase is the small-letter form of writing (a, b, c). 转换ing to lowercase changes every capital letter to its small form, which helps normalize data, emails, usernames, and URLs.
Does it handle accented 字符 and Unicode?
Yes. The converter uses JavaScript's native toLowerCase, which follows the Unicode standard, so accented letters (é, ü, ñ) and non-Latin scripts are converted correctly.
Is my text uploaded anywhere?
No. Everything runs locally in your browser with vanilla JavaScript. Your text never leaves your device and nothing is stored or tracked.
Can I also convert to UPPERCASE or Title Case?
Yes — use the Case 转换er for UPPERCASE, Title Case, and Sentence case, or the dedicated 小写转大写 tool.