>_

snake_case to camelCase

snake_case is common for Python variables, Ruby, database columns and many REST APIs; camelCase is used for JavaScript / TypeScript / Java variables and JSON keys in many web APIs. Moving data between languages, databases and APIs often means converting between the two.

Examples

snake_case camelCase
user_id userId
first_name firstName
created_at createdAt
order_item_id orderItemId
is_active isActive

Try it

camelCase 
 
 
 PascalCase  
 
 
 
 snake_case  
 
 
 
 CONSTANT_CASE  
 
 
 
 kebab-case  
 
 
 
 Train-Case  
 
 
 
 dot.case  
 
 
 
 path/case  
 
 
 
 Title Case  
 
 
 
 Sentence case  
 
 
 
 lowercase  
 
 
 
 UPPERCASE  
 
 
 
 
  
 
    
In code
 
 
 
JavaScript
 
const toCamel = (s) => s.replace(/_([a-z\d])/g, (_, c) => c.toUpperCase());
 
 
Python
 
def to_camel(s: str) -> str:
    first, *rest = s.split('_')
    return first + ''.join(w.capitalize() for w in rest)
 
 
  
More examples
  
 Open the full Case Converter →