Lowercase words joined with underscores. Python, Ruby, and many databases use it.

helloWorldExample → hello_world_example. Acronyms in XMLHttpRequest become xml_http_request.

Same tokens, all caps. Shown on this page under CONSTANT_CASE.

Treated as separators, same as hyphens.

Runs in your browser · Last updated 4 September 2026

Snake Case Converter

camelCase or kebab-case to snake_case. Python-friendly identifiers, one per line, in this tab.

Text — one identifier per line, or a phrase

snake_case

hello_world_example
xml_http_request
user_id_value

camelCase

helloWorldExample
xmlHttpRequest
userIdValue

PascalCase

HelloWorldExample
XmlHttpRequest
UserIdValue

kebab-case

hello-world-example
xml-http-request
user-id-value

CONSTANT_CASE

HELLO_WORLD_EXAMPLE
XML_HTTP_REQUEST
USER_ID_VALUE

Title Case

Hello World Example
Xml Http Request
User Id Value

Sentence case

Hello world example
Xml http request
User id value

UPPER CASE

HELLO WORLD EXAMPLE
XMLHTTPREQUEST
USER_ID_VALUE

lower case

hello world example
xmlhttprequest
user_id_value

How to use this tool

helloWorldExample → hello_world_example. Hello World Example → hello_world_example.

What is snake_case?: Lowercase words joined with underscores. Python, Ruby, and many databases use it.
Camel to snake?: helloWorldExample → hello_world_example. Acronyms in XMLHttpRequest become xml_http_request.
CONSTANT_CASE?: Same tokens, all caps. Shown on this page under CONSTANT_CASE.
Uploaded?: No.
Spaces?: Treated as separators, same as hyphens.