Uppercase
Convert text to UPPERCASE.
OpenConvert to snake_case. - runs entirely in your browser. Free, fast and private.
Add camelCase, kebab-case, or plain English text.
Words are lowercased and joined with underscores.
Spaces and capitals convert to underscore separators.
Copy the identifier for Python vars or DB columns.
Snake Case is a free text utility on OneDevToolkit. Convert to snake_case. It runs in your browser for this session - use the workspace on this page to try it.
Need a related step? Open the Text Tools hub at /text-tools/ or the <a href="/blog/">blog</a> for longer workflows.
Processes data instantly with no server round-trips.
Your data never leaves your browser. Nothing is uploaded.
Works in any modern browser. Nothing to download or install.
No limits, no sign-up, no credit card required.
Works on desktop, tablet and mobile devices.
Beautiful in both themes. Your preference is saved.
Keyboard shortcut
Open Snake Case when you need a quick result without uploading data to a third-party site.
No install required - bookmark the tool and return anytime.
Client-side processing keeps inputs on your device for core OneDevToolkit tools.
Answers for this tool. For site-wide help, open the FAQ hub.
Snake Case helps you convert to snake_case. instantly in the browser.
Yes - modern browsers handle Unicode strings. Some case transforms behave differently for locale-specific characters.
Most text tools preserve line structure unless the operation is specifically about wrapping, sorting, or joining lines.
No artificial server quota. Extremely large pastes may slow the tab - split the text if needed.
Use Clear and re-paste, or keep the original in another tab. Browser undo may work inside the textarea.
Processing is local. Avoid pasting secrets into any website if your policy forbids it - prefer offline editors for credentials.
Use Copy on the toolbar or select the output panel. Download is available when the tool exposes a file export.
Treat markup as plain text unless the tool is specifically a Markdown/HTML utility. Preview elsewhere if rendering matters.
Paste from Notes/email, run Snake Case, then copy back. Long documents are easier on desktop.
Browse Text Tools for case converters, counters, diff, and cleanup tools.