Constant Case Converter

Input

Character: 0/200000Word: 0Line: 0Sentence: 0

Output

Character: 0Word: 0Line: 0Sentence: 0

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About Constant Case Converter

Convert text to CONSTANT_CASE with uppercase letters and underscores. This format is perfect for constants, environment variables, configuration keys, and enum values. Use it to standardize names across codebases and data files.

How to Convert Text to Constant Case

Paste your text: Enter words, phrases, or identifiers.
Convert to CONSTANT_CASE: Spaces are replaced with underscores and letters become uppercase.
Copy the output: Use it in code, configs, or documentation.

Why Use Our Constant Case Tool?

Consistent naming: Creates uniform constants across projects.

Code friendly: Commonly used for environment variables and enums.

Readable format: Underscores make long identifiers easy to scan.

Common Uses for Constant Case

CONSTANT_CASE is widely used for configuration and system values where clarity matters.

Environment variable keys and .env files.
Enum values and application constants.
Feature flags and configuration options.
Analytics event names and system tags.

Frequently asked questions

What is constant case?

Constant case uses uppercase letters with underscores between words, like CONSTANT_CASE.

How is CONSTANT_CASE different from snake_case?

CONSTANT_CASE is uppercase, while snake_case is lowercase with underscores.

Does it remove spaces and punctuation?

Yes. It replaces spaces with underscores and removes most punctuation.

Are numbers preserved?

Yes. Numbers remain in the output where they appear in the input.

Can I convert kebab-case or snake_case to constant case?

Yes. Paste any format and the tool will normalize it to CONSTANT_CASE.

Is this constant case converter free?

Yes, it is free to use online with no signup required.

Is it good for environment variables?

Absolutely. CONSTANT_CASE is the most common format for env keys.

Will it keep existing underscores?

Yes. Existing underscores remain, and extra spaces are normalized.

Is there a character limit?