🔤 Case Converter
Instantly convert any text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and more. A must-have for writers, developers, and anyone formatting text quickly.
What This Tool Does
This tool instantly rewrites your text in a different letter case — UPPERCASE, lowercase, Title Case, Sentence case, and several others. Paste your text, pick a case, and copy the result. It saves you from the tedious work of retyping or hand-fixing capitalization, which is exactly the kind of repetitive task a computer should handle for you.
It is genuinely useful more often than you would think: fixing a heading you accidentally typed with caps lock on, formatting a title to a publication's style, converting a shouty all-caps paragraph into something readable, or standardizing a list of names. Whatever the source of the mismatch, this converts it in one click without touching the words themselves.
The Different Cases, and When to Use Each
UPPERCASE turns every letter capital — useful for short emphasis or acronyms, but exhausting to read in long stretches, which is why all-caps paragraphs feel like shouting. lowercase does the opposite, handy for normalizing text or for a deliberately casual, modern look. Title Case capitalizes the first letter of each major word, the standard for headlines and titles. Sentence case capitalizes only the first letter of each sentence, the natural style for normal prose.
There are subtler ones too. Capitalized Case capitalizes every word including small ones, while true title case leaves words like “and,” “of,” and “the” lowercase unless they start the title. aLtErNaTiNg and InVeRsE cases are more playful, used for stylistic effect online. Knowing which is which means you pick the right one the first time instead of converting twice.
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A Note on Title Case Rules
Title case is fussier than it looks, and getting it right marks the difference between polished and amateur writing. The widely accepted convention capitalizes the first and last words of a title and all the major words in between — nouns, verbs, adjectives, adverbs — while leaving short conjunctions, articles, and short prepositions (and, but, the, a, of, in) lowercase, unless one of them happens to be the first or last word.
Different style guides disagree on the fine points, particularly around prepositions of four or more letters and words like “is” and “be.” If you are writing for a specific publication, follow its style guide. For general use, the common rule above produces clean, professional titles. This tool applies sensible title-case logic so your headings look intentional rather than randomly capitalized.
Quick Tips
- For headlines, Title Case looks more professional than capitalizing every single word.
- If you typed a whole line with caps lock on by mistake, lowercase or Sentence case fixes it instantly.
- All-caps reads as shouting in body text — reserve it for short labels and emphasis.
- Copy the converted text with one click rather than retyping, which avoids introducing new typos.
Frequently Asked Questions
What is the difference between Title Case and Capitalized Case?
Title Case follows headline conventions, leaving small words like “and,” “of,” and “the” lowercase unless they begin the title. Capitalized Case capitalizes the first letter of every word without exception. Title Case is standard for titles; Capitalized Case is more uniform but less conventional.
Does converting case change my actual words?
No. Only the capitalization changes — every letter, word, and punctuation mark stays exactly where it was. You are reformatting the text, not editing its content.
Is my text uploaded anywhere?
No. The conversion happens entirely in your browser, so your text never leaves your device. You can paste sensitive or private text with confidence.
How do I fix text I typed with caps lock on?
Paste it and choose lowercase to make it all small, or Sentence case to restore normal capitalization with capital letters at the start of each sentence. Either fixes an accidental all-caps line in one step.
Private, Instant, and Free
This tool runs entirely in your browser — nothing you type or paste is uploaded or stored, so you can use it with private text without a second thought. It loads instantly, needs no account or download, and works on any device. Like every tool here, it is free to use as often as you like, built to be something you can rely on whenever the need comes up.
Related Tools
For more text work, the word counter gives you counts and reading time, the title case converter focuses specifically on headline capitalization, and the remove line breaks tool cleans up text copied from PDFs and emails.
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