Convert your text to uppercase, lowercase, title case, sentence case, camelCase, snake_case and 6 more formats. 100% local, free, instant.
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Convert text to uppercase, lowercase, title case, camelCase, snake_case and more. Free, instant, 100% local — your text never leaves your browser. Whether you need this for personal projects, professional work, or quick one-off tasks — our browser-based tool handles it instantly with no installation, no signup, and no file uploads to external servers. Everything runs locally in your browser for maximum speed and privacy.
Cleaning and formatting text data before importing into databases or spreadsheets. Preparing content for publishing, emails, or documentation. Analyzing text patterns in logs, reports, or research data. Transforming text between different conventions or formats. Processing copied content from PDFs, web pages, or other sources. Quick text operations for writing, editing, or data entry workflows.
All processing happens entirely in your browser — no files are uploaded to any server, ensuring complete privacy. Handles texts with tens of thousands of lines without lag. Supports Unicode characters, accented letters, and CJK text. Real-time preview of all transformations. Copy results to clipboard or download as .txt file. Works with any line-separated or structured text format. Import from files or paste directly from any source.
Copy-paste your text into the input area, or type it directly. All formats and languages are supported.
Click the button for the format you need: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and 6 more options.
The converted text appears instantly. Click "Copy result" to paste it wherever you need.
Text case refers to the way letters are capitalized in a piece of text. The most common cases are uppercase (all capitals), lowercase (no capitals), and title case (first letter of each major word capitalized). In everyday writing, using the right case improves readability and professionalism — a title in Sentence case feels polished, while all-caps can seem like shouting.
In programming, naming conventions like camelCase, snake_case, kebab-case, and PascalCase are not just style preferences — they are enforced by language communities and linting tools. Using the wrong case can break your code (e.g., CSS classes are case-sensitive), confuse teammates, or violate project style guides. A case converter eliminates manual reformatting and reduces errors.
Quick & easyThis tool runs entirely in your browser using JavaScript. Your text is never uploaded, stored, or processed on any server. There is no network request, no analytics on your content, and no data retention. Close the tab and everything is gone.
No data is sent to any server — all processing happens locally in your browser for maximum privacy.
100% browser-basedEverything you need to know about our case converter