Input
Result
The result will appear here.Your runs
Only runs that cost points are saved.
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Crossing a language boundary means crossing a naming convention: JSON from a Python service arrives as snake_case and has to become camelCase, and CSS wants kebab-case. This converts between ten conventions and does it line by line, so a pasted column of field names converts as a list rather than as one run-on string.
How it works
- Word boundaries are detected from existing case changes, underscores, hyphens and spaces.
- Acronyms are handled: HTTPResponse splits into HTTP and Response rather than one word.
- Each line converts independently, so pasted lists keep their shape.
Where your data goes
Nowhere. This tool runs entirely in your browser: the text you paste is processed by the page and is never transmitted to a server or written to a log.
When a run costs points, a one-line summary is saved to your own history so you can find it again. The summary records the shape of the run — sizes, counts, the values you looked up — never the content you pasted.
What it costs
This tool is free, with no sign-in and no points.
Common questions
- How are acronyms handled?
- A run of capitals followed by a capital-lowercase pair is split before the last capital, so HTTPResponse becomes http_response rather than h_t_t_p_response.
- Can I convert a whole JSON document's keys?
- Not in one step — this converts text, not structure. For a document, convert on the way in or out of your serialiser, where the keys are already separated from the values.
- What is dot case for?
- Configuration keys and feature flags: service.feature.enabled. It is the convention most hierarchical config systems expect.
The open-source behind it
This tool is a self-contained implementation. blakeembrey/change-case (MIT) does the same job as a library — if you need this behaviour inside your own program, start there rather than calling a web page.
blakeembrey/change-caseAlso known as
- case converter
- camelcase converter
- snake case
- kebab case
- convert text case