Case Converter

Case Converter takes any block of text and rewrites its capitalization in the exact style you need, without you having to retype a single word. Paste a sentence, a paragraph, a column of names, or a list of variable ideas, then pick a target format: UPPERCASE turns everything to capitals, lowercase strips them all away, Title Case capitalizes the first letter of each word, and Sentence case capitalizes only the first letter of each sentence while leaving the rest intact. For developers there are three programming-friendly modes: camelCase joins words with no spaces and an internal capital ("userAccountId"), snake_case links them with underscores ("user_account_id"), and kebab-case joins them with hyphens ("user-account-id"). The conversion runs entirely in your browser using JavaScript string methods, so the text you type never leaves your device, is never uploaded to any server, and works even if your connection drops mid-task. Everything recalculates the instant you switch formats. The tool is genuinely useful for messy real-world text. Marketers clean up headlines that were accidentally typed with Caps Lock on. Writers fix ALL-CAPS quotes pasted from PDFs and emails. Developers rename a batch of database columns or CSS classes without hand-editing each one. Students reformat citations and titles to match a style guide. Data analysts normalize spreadsheet headers before importing. Because the camelCase, snake_case, and kebab-case modes intelligently split on spaces, hyphens, and underscores, you can feed in "First Name", "first-name", or "first_name" and reliably get the target style out. A practical tip: Title Case here capitalizes every word, which is fine for casual headlines, but for strict editorial style you may still want to lowercase small words like "of" and "the" by hand afterward. Another tip: run Sentence case first to tame a shouty paragraph, then apply Title Case only to the actual heading. It matters because consistent capitalization signals care, improves readability, and prevents subtle bugs in code where "UserID" and "userId" are treated as different identifiers.