Snake Case Converter
Convert phrases, camelCase, and kebab-case to snake_case in your browser.
Tool workspace
Conversion runs in your browser. Nothing you paste is sent to our servers.
How it works
Paste or type text into the input. The tool splits on spaces, hyphens, underscores, and other separators, and also on lowercase→Uppercase boundaries—the same word splitting as the Camel Case and Pascal Case converters.
Each word is lowercased and joined with underscores (hello world → hello_world, fooBar → foo_bar, foo-bar-baz → foo_bar_baz).
Results update as you type (light debounce) or when you press Convert. Empty input produces an empty result—no error.
Locale note: letter case uses the browser’s String.toLowerCase() (and UTF-8 mb_strtolower mirrors in Domain tests).
Each word is lowercased and joined with underscores (hello world → hello_world, fooBar → foo_bar, foo-bar-baz → foo_bar_baz).
Results update as you type (light debounce) or when you press Convert. Empty input produces an empty result—no error.
Locale note: letter case uses the browser’s String.toLowerCase() (and UTF-8 mb_strtolower mirrors in Domain tests).
Examples
- hello world → hello_world
- fooBar → foo_bar
- foo-bar-baz → foo_bar_baz
- AlreadyCamelCase → already_camel_case
Privacy
Privacy: this tool processes text locally in your browser. We do not log or store what you paste. Login is not required.
FAQ
Is my text uploaded to a server?
No. Snake case conversion runs entirely in your browser. Pasted content is not sent to Nova Engine.
Do I need an account?
No. All published tools work for guests without login.
How is this different from kebab-case?
snake_case joins words with underscores (hello_world). kebab-case joins with hyphens (hello-world). Both use the same word-splitting rules.