snake_case

Convert Text to snake_case

Instantly convert text to snake_case, camelCase, kebab-case, and more. Perfect for programming variables, file names, and API endpoints.

Choose Format

Examples

Variable Name

Input:
User Full Name
→
Output:
user_full_name

File Name

Input:
Project Report 2024
→
Output:
project_report_2024

API Endpoint

Input:
Get User Profile
→
Output:
get_user_profile

Database Column

Input:
Customer Email Address
→
Output:
customer_email_address

What is snake_case?

snake_case (also called underscore case) is a naming convention where words are written in lowercase and separated by underscores (_). It's one of the most popular naming styles in programming.

When to Use snake_case

✅ Perfect For:

  • • Python variables and functions
  • • Database table and column names
  • • File names and directory paths
  • • Ruby variables and methods
  • • REST API endpoints
  • • Configuration file keys

💡 Example Uses:

  • • user_profile.py
  • • get_user_data()
  • • customer_email_address
  • • /api/get_orders
  • • database_connection
  • • max_retry_attempts

snake_case vs Other Formats

Format Example Common Use
snake_case user_full_name Python, Ruby, databases
camelCase userFullName JavaScript, Java
PascalCase UserFullName Classes, components
kebab-case user-full-name URLs, CSS classes

How It Works

  1. Converts all letters to lowercase
  2. Removes special characters and punctuation
  3. Replaces spaces with underscores (_)
  4. Removes consecutive underscores
  5. Removes leading/trailing underscores

Related Case Converters

🐫 camelCase Converter
JavaScript / Java naming style
✨ JSON Formatter
Pretty-print, validate, and minify JSON
📊 CSV → JSON
Turn spreadsheet headers into snake_case keys
🆔 UUID Generator
RFC 4122 / 9562 v1, v4, v7 IDs
#️⃣ Hash Generator
MD5, SHA-1, SHA-256, SHA-512
All Tools →
Browse the full FunWithText library

Frequently Asked Questions

What programming languages use snake_case?

Python, Ruby, and Rust commonly use snake_case for variable and function names. It's also the standard for SQL database column names and table names.

Is snake_case better than camelCase?

Neither is inherently better—it depends on context. Use snake_case for Python/Ruby code and databases. Use camelCase for JavaScript and Java. Consistency within your project matters most.

Can I convert multiple lines at once?

Yes! Paste multiple lines of text and the converter will process each line independently, preserving the line structure.