Camel Case to Snake Case Converter Online
Switch between naming conventions without breaking a sweat. Our camel case to snake case converter online handles camelCase, PascalCase, and snake_case transformations with one click. Whether you are refactoring legacy code, aligning a team style guide, or prepping database column names, this free case converter keeps your identifiers consistent and readable.
What Are Naming Conventions?
| Convention | Example | Description |
|---|---|---|
| camelCase | `myVariableName` | First word lowercase, rest capitalized |
| PascalCase | `MyClassName` | Every word capitalized |
| snake_case | `my_variable_name` | Lowercase words separated by underscores |
| kebab-case | `my-variable-name` | Lowercase words separated by hyphens |
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Why Convert Between Cases?
| Scenario | From | To | Reason |
|---|---|---|---|
| Database columns | `snake_case` | `camelCase` | ORM field mapping |
| API responses | `camelCase` | `snake_case` | Backend JSON standards |
| Variable naming | `snake_case` | `camelCase` | JavaScript/TypeScript style |
| Class names | `camelCase` | `PascalCase` | OOP conventions |
| Legacy codebases | Mixed | Consistent | Technical debt cleanup |
Conversion Logic
| Input | Mode | Output |
|---|---|---|
| `camelCaseString` | camel → snake | `camel_case_string` |
| `PascalCaseString` | pascal → snake | `pascal_case_string` |
| `my_snake_case` | snake → camel | `mySnakeCase` |
| `HTTPResponseCode` | camel → snake | `http_response_code` |
| `XMLHttpRequest` | pascal → snake | `xml_http_request` |
| `myVariableNameHere` | camel → snake | `my_variable_name_here` |
How to Use
1. Choose a Mode
Select the conversion direction: camelCase to snake_case, snake_case to camelCase, or PascalCase to snake_case.
2. Paste Your Text
Drop your variable names, class names, or database columns into the input box.
3. Convert
Click Convert to generate the transformed output.
4. Copy and Apply
Paste the result directly into your codebase.
Best Practices
| Practice | Why |
|---|---|
| Pick one convention per language | Reduces cognitive load |
| Use snake_case for databases | Matches most SQL conventions |
| Use camelCase for variables and functions | JavaScript and TypeScript standard |
| Use PascalCase for classes and components | OOP and React convention |
| Avoid abbreviations | Improves readability |
| Be consistent within a project | Prevents merge conflicts |
Edge Cases and Notes
| Edge Case | Input | Output |
|---|---|---|
| Acronyms | `HTTPServer` | `http_server` |
| Numbers | `user2Factor` | `user2_factor` |
| Multiple capitals | `parseHTMLString` | `parse_html_string` |
| Leading capitals | `XMLHttpRequest` | `xml_http_request` |
| Special chars | `user@name!` | `username` |
Conclusion
Our camel case to snake case converter online removes the manual effort from renaming variables, columns, and API fields. Whether you call it a snake case to camel case tool, a pascal to snake case converter, or just a general case converter, it keeps your codebase consistent, readable, and standards-compliant. Try it above — paste any identifier and get the right format instantly.