Normalize API fields
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Case Converter
The case converter rewrites text into common developer naming formats. It is useful when moving between JSON keys, database columns, CSS classes, filenames, headings, and code identifiers.
Paste a phrase or identifier, choose the target case, and copy the converted output. The conversion runs in your browser and keeps the workflow fast for small naming tasks.
Case converter
Convert text between common developer case formats.
What this tool does
Developer work often means moving names between conventions. JSON APIs may use camelCase, databases may use snake_case, URLs may use kebab-case, and class names or components may use PascalCase. A case converter removes the small but annoying manual edits between those formats.
This tool tokenizes common separators and capitalization patterns, then rewrites the text into the selected format. It is designed for short identifiers, headings, labels, and field names rather than long prose transformations.
Common use cases
Prepare CSS and file names
Turn labels into kebab-case or snake_case without manual separator cleanup.
Create component names
Convert phrases into PascalCase when sketching component or type names.
Example before and after
The same words can be rewritten into different naming conventions without changing their meaning.
Input phrase
user profile imagecamelCase output
userProfileImageHow to use
- Paste the text or identifier you want to convert.
- Choose a case format.
- Copy the converted text.
Common errors
Acronym expectations
Acronyms may need manual adjustment if your style guide prefers URLId or urlID forms.
Long prose input
Case conversion is best for short labels and identifiers, not full paragraphs.
Locale-specific rules
Some languages have capitalization rules that simple developer case conversion does not model.
Why use this tool
Convert field names between APIs and databases.
Prepare CSS classes, filenames, or code identifiers.
Normalize text without manual find-and-replace.
Best practices
Match the target system
Use camelCase for many JavaScript keys, snake_case for many database fields, and kebab-case for slugs or CSS classes.
Review generated identifiers
Check output before committing names into public APIs or database schemas.
Keep names descriptive
Changing case will not fix vague naming, so choose clear words first.
Related tools
Related guides
Common text case formats explained
Different systems prefer different naming conventions. Knowing the common case formats makes APIs and code easier to keep consistent.
How to create SEO friendly slugs
Good slugs are short, descriptive, lowercase, hyphen-separated, and stable enough to preserve links over time.
Best practices for working with API responses
API responses are easier to debug when you validate syntax, format payloads, inspect errors, and compare changes deliberately.
FAQ
Which case formats are supported?
The tool supports camelCase, PascalCase, snake_case, kebab-case, title case, uppercase, and lowercase.
Does it change the meaning of text?
No. It only rewrites separators and capitalization.
Can it handle existing snake_case?
Yes. It splits common separators such as spaces, underscores, and hyphens.
Is input uploaded?
The tool runs in your browser and does not require login, a database, or server-side processing.