Text Case & Slug Converter — Free Online Tool

What Is Text Case & Slug Converter?

A free online text case converter. Transform text between 10 different cases including UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and URL slugs. All in your browser, no sign-up required.

Text case conversion is a common but surprisingly varied need across different professions. Developers need to switch between camelCase, snake_case, and PascalCase depending on the programming language they use. SEO specialists need URL-friendly slugs. Writers need Title Case and Sentence case. Case Converter handles all of these with 10 different case modes and instant conversion as you type.

The tool transforms text between uppercase, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and URL slugs. Each mode follows the standard conventions for that format. For example, camelCase capitalizes the first letter of each word except the first with no separators, while snake_case joins words with underscores and keeps everything lowercase. The URL slug mode strips special characters and replaces spaces with hyphens, producing clean, SEO-friendly strings.

The conversion happens in real time as you type or select a mode. Paste or type any text, then click through the case modes to see the output change instantly. This makes it easy to compare formats side by side — if you are deciding whether to use snake_case or kebab-case for a project, you can see the exact output for your specific text before committing to a convention.

All processing is local and instant. There is no server round-trip, so your text — which might include proprietary code snippets or sensitive content — never leaves your device. The output can be copied with one click or downloaded as a .txt file for use in documentation, codebases, or content management systems.

Real-World Use Cases for Text Case & Slug Converter

Converting API Response Fields to Frontend Names

An API returns data with snake_case field names like "user_id" and "created_at." Your React frontend uses camelCase. Paste the list and select camelCase mode: "user_id" becomes "userId" and "created_at" becomes "createdAt." Copy the converted names directly into your TypeScript interfaces.

Creating SEO-Friendly URL Slugs from Article Titles

Your CMS needs URL slugs for blog posts. Paste the article title "10 Tips for Better SEO in 2025!" and select URL slug mode. The output "10-tips-for-better-seo-in-2025" is clean, lowercase, and URL-safe. Copy it into your CMS slug field.

Standardizing Variable Names Across a Codebase

Your team migrates from JavaScript (camelCase) to Python (snake_case). Convert all variable names at once: paste the list, select snake_case, and copy the converted names. This ensures consistency during migration without manual renaming each variable.

Why Use Text Case & Slug Converter?

10 case modes including camelCase, snake_case, kebab-case
URL slug mode for SEO-friendly text
Instant real-time conversion
Copy or download the result

How to Use Text Case & Slug Converter — Step by Step

Type or paste your text into the input area.

Select a case mode: UPPERCASE, lowercase, Title Case, camelCase, etc.

The output updates instantly as you select.

Copy the result or download as a file.

Who Is Text Case & Slug Converter Best For?

programming
SEO slugs
data formatting
content editing

Pro Tips for Text Case & Slug Converter

1Use URL slug mode for more than just URLs — it also produces clean, lowercase filenames with hyphens that work across all operating systems.
2When converting code between naming conventions, convert the full list at once rather than one variable at a time. The tool handles multi-line input, so paste all variable names together.
3Title Case mode capitalizes every major word but keeps articles (a, an, the) and prepositions (of, in, for) lowercase unless they start or end the title, following standard AP style.
4CONSTANT_CASE is useful for environment variable names and configuration keys. These are traditionally all-uppercase with underscores — generate a batch from descriptive names in one pass.

Text Case & Slug Converter — Frequently Asked Questions

What is camelCase?

camelCase capitalizes the first letter of each word except the first, with no spaces: likeThisExample. It is common in JavaScript and Java variable naming.

What is the difference between snake_case and kebab-case?

snake_case uses underscores between words (like_this), while kebab-case uses hyphens (like-this). snake_case is common in Python and Rust; kebab-case is common in URLs and CSS class names.

Does the text analyzer support non-English languages?

Yes. The analysis uses the browser's native Intl API for language-aware text segmentation. Word and character counting works correctly for most languages including Chinese, Japanese, Arabic, and accented Latin scripts.

Can I process very long documents?

Documents up to approximately 100,000 words are supported. Analysis is incremental, meaning results update instantly even for large texts without blocking the browser.

Is there a difference between character count with and without spaces?

Yes. The tool provides both metrics. Character count without spaces is commonly used for SMS, social media posts, and certain content management systems.

Ready to Use Text Case & Slug Converter?

Free online tool — works in your browser, no sign-up required. Start using it right now.

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