Case Converter

About the Case Converter

Fix text that was typed with caps lock on, turn a headline into proper title case, or convert a phrase into the camelCase, snake_case or kebab-case formats used in programming. One click converts the whole block; you can then copy the result.

How to use it

1. Paste the text you want to convert.
2. Press the button for the case you need — UPPER, lower, Title, Sentence, camelCase, snake_case or kebab-case.
3. Copy the converted text with the Copy button.

Tips and good to know

• Title Case here capitalises every word except short joining words (a, an, the, and, of, in, on, to…) unless they start the title — close to the AP and Chicago styles.
• Sentence case lowercases everything and then capitalises the first letter of each sentence, so check proper nouns afterwards.
• camelCase and snake_case strip punctuation, which makes them handy for variable names and file names.

About text & writing tools

Writers, students, marketers and developers spend a surprising amount of time doing mechanical things to text: counting words for a brief, fixing an accidental caps-lock paragraph, removing duplicate lines from an export, or spotting what changed between two drafts. None of these tasks need artificial intelligence — they need a precise, predictable tool.

Every text tool here runs instantly as you type and never stores what you paste. That makes them suitable for unpublished manuscripts, client copy and confidential notes. Where a tool makes a judgement call — such as how it defines a 'word' or a 'sentence' — the guide below explains the rule so you can trust the number you report.

Counting and comparing text sounds simple, but the rules matter. Different systems disagree on whether a hyphenated word is one or two words, whether an emoji is one character or several, and where a sentence ends after an abbreviation. Publishers, universities and social networks each publish their own limits, so when a number really matters — a grant application, a journal abstract, an SEO title — check which counting rule the reader uses. Our tools follow the conventions of mainstream word processors and browsers and explain any judgement calls on each page, so that you can report a figure with confidence and reproduce it later.

Popular ways people use text & writing tools

• Checking an essay, cover letter or grant application against a strict word or character limit.
• Comparing two versions of a contract clause or policy to see exactly what the other side changed.
• Cleaning a mailing list exported from several sources so nobody receives the same email twice.
• Turning article titles into clean, readable URL slugs when publishing posts in a content system.
• Fixing a paragraph that was accidentally typed with caps lock on without retyping it from scratch.

How we build and test our free tools

Every tool in this collection is built and tested by The Curator team. Before a tool is published we check it against known reference results — textbook loan schedules, standard test vectors for hashes, sample files for conversions — and we re-check it whenever browsers change. Each page explains the method so you can verify the answer yourself rather than take it on trust.

The tools run as JavaScript inside your browser tab. When you choose a file, your browser reads it from your disk into memory; the tool processes it and gives you the result as a download. No copy is sent to us or to anyone else, and nothing is kept after you close the tab. That is why these tools are safe for personal documents, and why they keep working on a slow or interrupted connection once the page has loaded.

The collection is free because it is supported by advertising on these guide pages. We never charge for a tool, never add watermarks and never sell what you type. If something doesn't work as described, or you would like a tool we don't have yet, please contact us — new tools are added in regular batches based on what readers ask for.

Frequently asked questions

Will it handle accented letters?

Yes. It uses your browser's Unicode-aware upper- and lower-case rules, so é, ß and similar characters convert correctly.

Can I undo a conversion?

Converting to lower or upper case loses the original capitalisation. Keep a copy if you might need it, or use your browser's undo inside the box.

What's the difference between kebab-case and snake_case?

kebab-case joins words with hyphens (used in URLs and CSS); snake_case joins them with underscores (common in Python and databases).

Is the Case Converter really free?

Yes. There is no account, no trial and no watermark. The Curator is supported by advertising on its guide pages, never by charging for tools or selling your data.

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