Free Online Case Converter
Use the case converter to change text into uppercase, lowercase, title case, sentence case, alternating case, inverse case, or a clean slug.
Result
A case converter for clean, consistent text
A case converter saves time when text arrives in the wrong format. Instead of retyping a heading, cleaning copied data, or fixing a batch of labels one by one, paste the content and choose the style you need. This case converter covers the common formats from the reference tool: UPPERCASE, lowercase, Title Case, Sentence case, and alternating case. It also adds inverse case and slug format for workflows that need filenames, URLs, spreadsheet labels, or quick formatting experiments.
Consistency matters in writing and publishing. A blog headline may need title case, a warning label may need uppercase, and a support macro may need sentence case so it reads naturally. A reliable case converter helps you move between those choices without changing the words themselves. The output stays visible in a result panel, where you can copy it, clear the workspace, or send the converted text back into the input for another transformation.
This case conversion tool is intentionally simple. It does not require an upload, sign-in, or external editor. You can test different formats rapidly and keep the original input nearby. That makes the case converter useful for editors, marketers, developers, students, data cleaners, and anyone who works with text that must fit a particular style guide. The goal is practical text cleanup with no ceremony.
Seven formats
Convert to uppercase, lowercase, title case, sentence case, alternating case, inverse case, or slug format.
Copy-ready result
The case converter separates input and output so you can review the converted text before copying.
Fast cleanup
Use it for headings, social posts, data rows, product copy, filenames, and notes.
When each case conversion is useful
UPPERCASE is useful for short labels, warnings, acronyms, and visual emphasis, but it can feel loud in long passages. Lowercase is helpful when pasted text has inconsistent capitalization. Title Case works well for headlines, slide titles, article names, and section labels. Sentence case is usually the best choice for readable descriptions, interface messages, and email text.
Alternating case is mostly playful, but it is included because many quick text tools support it and users expect the option. Inverse case flips each letter and helps diagnose inconsistent capitalization in test strings. Slug format is an extra feature for practical publishing work: it lowercases text, removes unsupported symbols, and joins words with hyphens so the result is easier to use in URLs and filenames.