Encoding

Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case and CONSTANT_CASE.

NewAPI Ready

Focused calculator

Calculate Case Converter

HELLO_WORLD_EXAMPLE

CONSTANT_CASE

Guide & details

When to use this tool

Use the Case Converter for quick, focused data cleanup directly on the page before copying the output into code, documentation, spreadsheets or another tool.

Developer, SEO, analytics and content workflows where text needs to be encoded, decoded or normalized safely.
Cleaning a value before pasting it into a URL, HTML page, config file or API request.
Checking privacy notes before using sensitive text such as tokens or copied session data.

Accuracy, privacy and assumptions

Encoding changes representation, not meaning. Decoding untrusted input can reveal unsafe HTML, URLs or scripts.
Browser-only tools keep input local; API-enabled tools can also be called programmatically for non-sensitive data.

Common mistakes to avoid

Most wrong answers from a Case Converter come from unit direction, rounding too early, or copying a result without its original context.

Do not assume encoding encrypts data. Base64, URL encoding and HTML entities are reversible representations.
Decode untrusted strings carefully because the output can contain scripts, markup or control characters.
For private tokens or session strings, prefer browser-only tools and avoid unnecessary sharing.

Copy-ready result format

Case Converter output: HELLO_WORLD_EXAMPLE (CONSTANT_CASE).

Keep the original input available until the destination accepts the transformed output.
Copy validation errors along with the input when debugging a failed import.
Use browser-only pages for sensitive copied text or account-like payloads.

Best workflow for Case Converter

Paste or type the input into the tool above.
Choose the target mode or format when the tool offers one.
Review validation errors and copy the output only after it matches the expected structure.
For sensitive data, prefer browser-only tools and avoid API-enabled endpoints.

Next steps after this result

After the immediate calculation, choose the next tool based on what you plan to do with the value.

Copy the transformed output into the destination and test it there.
Keep a copy of the original input.
Use browser-only pages for sensitive values.

Base64 Encode / Decode URL Encode / Decode Full unit converter Batch converter API docs

Formula

How it works: The text is split into words on spaces, delimiters and camelCase humps, then re-joined in the chosen casing convention.

Common examples

Input	Result
camelCase	helloWorldExample
snake_case	hello_world_example
kebab-case	hello-world-example

JSON API example

POST a JSON body to the public endpoint.

curl -X POST https://api.convematik.com/case \
  -H 'Content-Type: application/json' \
  -d '{"text": "hello world", "mode": "snake"}'

{
  "result": "hello_world"
}

Common questions

What does the Case Converter do?

Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case and CONSTANT_CASE.

Does the Case Converter send my data to a server?

The Case Converter runs locally in your browser for instant results, and the same transform is also available as a public JSON API endpoint.

When should I use the Case Converter instead of a spreadsheet or script?

Use the Case Converter for quick validation, formatting, decoding or cleanup when you need a deterministic output before copying the result into code, docs, an API request or a spreadsheet.

Is the Case Converter free to use?

Yes. The Case Converter is free and does not require an account.