Convert text case online

A case converter reshapes the capitalization pattern of text while keeping the underlying letters the same. You might need ALL CAPS for a banner, sentence case for prose, or camelCase for JavaScript identifiers.

Manual editing is slow and error-prone on long lists. This tool applies consistent rules in one pass so headers, filenames, and API field names stay uniform.

Because processing is instant, you can experiment with several styles on the same sample before committing to one format in your document or codebase.

The most common request is to change uppercase to lowercase—cleaning pasted headings, normalizing form input, or preparing text for case-insensitive search. Select lower case and the entire block shifts to small letters in one click.

Going the other direction, lowercase to uppercase is useful for acronyms, warning labels, and design mockups. You can also invert mixed case when legacy data arrives in inconsistent shapes.

Neither direction alters numbers, punctuation, or spacing. If you need to strip extra whitespace first, use the remove-whitespace tool, then return here for capitalization.

Title case capitalizes major words for headlines and product names. Sentence case only lifts the first letter of each sentence—better for body copy and conversational blog posts.

Automated title case follows general English rules. Formal APA or AP style title case may treat short words like “and” or “of” differently; skim the output and adjust proper nouns or hyphenated terms by hand when your style guide requires it.

Writers often draft in sentence case, then switch to title case for image overlays or directory listings. Paste once, try both buttons, and copy whichever reads better for the channel.

Developers use camelCase when the first word stays lowercase and later words are capitalized—common in JavaScript and Java field names. snake_case joins words with underscores, typical in Python modules and database columns.

kebab-case hyphenates words for URLs and CSS class names. Capitalized case (title-style per word) helps when generating PascalCase type names from plain English phrases.

Paste a column of identifiers from a spreadsheet, convert the whole block, and paste back into your IDE. For renames across many files, still use your editor’s refactor tools—this page shines for quick one-off transforms.

Case conversion respects Unicode letters where your browser supports them, but symbols and numbers stay unchanged. Emoji and combining characters may not follow English title-case rules.

Copy from PDFs sometimes includes hidden spaces or odd line breaks. Trim extra whitespace before converting, or run through remove-whitespace if line breaks should become spaces.

Multi-line blocks convert as a single unit unless you split lines yourself. For per-line normalization in a list, paste one row at a time or split with the string splitter tool first.

All transformations use native JavaScript string methods in your session. Nothing is uploaded, logged, or stored on a server—safe for internal memos, customer names, and ticket exports.

Very large pasted blocks can slow the tab slightly; split huge files if the browser feels sluggish. There is no fixed character cap beyond your device’s memory.

Passwords and secrets should follow your team’s hygiene rules. Data never leaves your machine here, but clipboard history may still retain sensitive strings after you copy.