Case Converter

Instantly convert text into clean writing, SEO, and developer-friendly formats. 100% Client-Side. No uploads.

Text Cases

Choose your output format

Sentence case

Input Text

Converted Output

Input: 0 chars Output: 0 chars Words: 0 Lines: 0

🔒 PRIVACY NOTE: Your files are processed entirely within your web browser. We do not upload, store, or share your data with any servers. 100% secure and private.

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How to convert text case

Clean and reformat text instantly for writing, SEO, filenames, coding, and publishing.

Paste or Upload Text

Paste your text into the editor or upload a plain text file. Everything runs locally in your browser.

Choose a Case

Select sentence case, title case, uppercase, lowercase, camelCase, snake_case, kebab-case, slug format, and more.

Copy or Download

Review the converted output, copy it to your clipboard, or download it as a clean text file.

Frequently Asked Questions

Is this tool completely free?

Yes! File Gulp provides completely free file conversion tools with no hidden fees, no watermarks, and no registration required.

Are my files safe?

Absolutely. Unlike other converters, File Gulp uses modern WebAssembly technology to convert files directly on your device. Your files never leave your computer, ensuring maximum privacy.

Does it work on mobile devices?

Yes, our tool is fully responsive and works perfectly on smartphones and tablets, directly from your mobile browser.

Will the quality be affected?

No, we use high-quality algorithms to ensure your output files maintain the best possible quality during conversion.

Is there a file size limit?

Very large files may be limited by your device memory/browser performance. For normal image sizes, conversion is fast and seamless.

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Writing

Fix messy capitalization instantly

Use this case converter to turn pasted notes, emails, titles, social posts, and document text into clean sentence case, title case, uppercase, lowercase, or capitalized case without manually retyping anything.

Developer

Developer-friendly naming formats

Convert natural language into camelCase, PascalCase, snake_case, kebab-case, dot.case, and SEO-friendly slugs for variables, filenames, routes, CSS classes, URLs, and component names.

A private, faster, and smarter case converter

Many online case changers only support four or five formats. File Gulp combines writing-focused conversions with developer naming formats, live stats, upload support, copy, download, spacing cleanup, and acronym preservation.

100% Client-Side: Your text is processed directly in the browser. It is not uploaded, stored, or sent to a third-party API.
Smart Title Case: Common short words such as “and”, “of”, “the”, and “in” stay lowercase unless they appear at the start or end of a title.
Useful for SEO: Generate clean lowercase hyphenated slugs for blog URLs, product pages, documentation pages, and landing pages.
Built for real workflows: Upload text files, clean extra whitespace, check character/word/line counts, copy the result, or download it instantly.