snake_case Converter
Convert text to snake_case instantly — free online tool
Instant Conversion
Transform text in real-time with a single click. No waiting, no loading.
100% Private
Everything runs in your browser. Your text is never uploaded to any server. We collect zero data.
Unicode Support
Works with English, Chinese, Japanese, Korean, accented characters, and more.
Mobile Friendly
Convert text on any device — desktop, tablet, or mobile. No app download needed.
How to Convert Text Case
- 1Paste your text — Type or paste text into the input box. Works with multiple lines.
- 2Click a conversion button — Choose from UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, or PascalCase.
- 3Copy the result — Click the copy button to copy the converted text to your clipboard.
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Frequently Asked Questions
What is snake_case?
snake_case is a naming convention where words are separated by underscores and all letters are lowercase. Example: "hello world" becomes "hello_world".
How do I convert to snake_case?
Paste your text into the input box above and click the "snake_case" button. The converted text will appear in the output area.
Is this tool free?
Yes, CaseShift is completely free with no signup required. There are no hidden fees or usage limits.
Does it work on mobile?
Absolutely! CaseShift is mobile-friendly and works on any device with a web browser.
Is my data safe?
Yes! All processing happens in your browser — nothing is uploaded to any server. Your text never leaves your device.
Can I convert multiple lines at once?
Yes, the tool works with multi-line text. Each line will be converted individually.
What about special characters and numbers?
Special characters are removed (except underscore), numbers are kept, and letters are converted to lowercase with underscores between words.
Does it support non-English characters?
Yes! CaseShift supports Unicode, so it works with English, Chinese, Japanese, Korean, accented Latin characters, and more.