Free snake_case Converter

Join words with underscores in lowercase — the naming style of Python variables, Ruby methods, SQL columns and config keys.

Word Counter

Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste your phrase

    'Total Price', 'userID field' or 'api-key-name' — casing and separators don't matter.

  2. 2

    Get lowercase snake

    Words become lowercase and join with single underscores.

  3. 3

    Copy into your code

    The identifier-safe result copies in one click.

Key features

InputOutput
Total Pricetotal_price
userID fielduser_id_field
api-key-nameapi_key_name — kebab converted
MAX CONNECTION RETRIESmax_connection_retries

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service.

  • No uploads, no accounts, no sign-up
  • No cookies or tracking of your text
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — the only requests you will ever see are this page's own static files (HTML, CSS, JavaScript). Nothing you type is ever transmitted.

Frequently asked questions

Does it produce SCREAMING_SNAKE too?
This page makes lowercase snake_case; use the CONSTANT_CASE variant when you need SCREAMING_SNAKE for environment variables or constants.
Are double underscores avoided?
Yes — words are rebuilt from stems, so consecutive separators collapse into single underscores.
Which languages prefer snake_case?
Python (PEP 8), Ruby methods, SQL column names, Rust variables and many config formats.
Does it work offline?
Yes — after the page loads, no connection is needed at all.

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