Free snake_case Converter — Instant Online Tool for Python & SQL
Convert any text to snake_case instantly with our free online tool. Essential for Python variables, SQL column names, database tables, environment variables, and file naming. Paste your text above and click snake_case — conversion happens in real time.
What is snake_case?
snake_case is a naming convention where all letters are lowercase and words are separated by underscores (_). It is one of the most widely used conventions in programming, particularly in Python, databases, and file naming. The name comes from the way underscores lie flat like a snake on the ground.
Example:
Input:
get user profile data
Output:
get_user_profile_data
When to use snake_case?
| Language / Context | Usage | Example |
|---|---|---|
| Python | Variables, functions, modules | get_user_data(), first_name |
| Ruby | Variables & methods | user_name, get_profile() |
| SQL/Database | Table & column names | $user_name, get_user_data() |
| PHP | Variables, functions | $user_name, get_user_data() |
| Rust | Variables, functions | user_name, get_data() |
| File naming | Script & config files | user_profile.py, api_config.json |
| Environment variables | Config & secrets | DATABASE_URL, API_SECRET_KEY |
Good vs Bad Examples
| Input Text | ✅ Correct | ❌ Wrong Format |
|---|---|---|
| get user data | get_user_data | getUserData / Get_User_Data |
| first name | first_name | firstName / First_Name |
| created at timestamp | created_at_timestamp | createdAtTimestamp |
| is user logged in | is_user_logged_in | isUserLoggedIn |
| api secret key | api_secret_key | ApiSecretKey |
snake_case vs Other Cases
| Case Type | Example | Separator | Best For |
|---|---|---|---|
| snake_case | user_profile_data | Underscore | Python, SQL, databases |
| camelCase | userProfileData | Underscore | JavaScript, Java, Swift |
| kebab-case | user-profile-data | Underscore | URLs, CSS, HTML attributes |
| SCREAMING_SNAKE | USER_PROFILE_DATA | Underscore | Constants, env variables |
Ready to convert your text? Use the tool at the top of this page — it's free, instant, and requires no signup.
Frequently Asked Questions
What is snake_case?
snake_case is a naming convention where all words are lowercase and separated by underscores. It is called snake_case because the underscores look like a snake lying flat. Example: user_profile, get_data.
Why is snake_case used in Python?
Python's official style guide (PEP 8) recommends snake_case for variable names, function names, and module names. It is considered more readable than camelCase for Python code.
What is the difference between snake_case and kebab-case?
snake_case uses underscores (user_name) while kebab-case uses hyphens (user-name). snake_case is used in Python and databases; kebab-case is used in URLs and CSS class names.
Can snake_case be used in SQL?
Yes — snake_case is the standard naming convention for SQL column names and table names. Examples: user_id, created_at, order_total. Most database style guides recommend snake_case.
What is SCREAMING_SNAKE_CASE?
SCREAMING_SNAKE_CASE is snake_case with all letters uppercase. It is used for constants and environment variables. Examples: DATABASE_URL, MAX_RETRY_COUNT, API_SECRET_KEY.
How do I convert text to snake_case online?
Paste your text into the converter at the top of this page and click 'snake_case'. Words are automatically lowercased and joined with underscores. Works for any length of text instantly.