What this calculator does
This is a simple change lower case to upper case tool: paste in a block of text, pick a mode, and it converts the whole thing to UPPER CASE, lower case, or Title Case. It does not try to guess anything about the text, it just applies the transform you choose to every character or word.
The three modes cover the common requests people search for separately: forcing text into all capitals for a heading, forcing it down to lower case to normalise messy input, or capitalising the start of each main word for a title or headline, while leaving short joining words such as "a", "of" and "the" in lower case unless they open or close the line.
The formula
Upper case and lower case modes run every character through a case swap. Title Case mode splits the text on spaces, capitalises the first letter of each word, then lower-cases small joining words (articles, short prepositions and conjunctions) unless they are the first or last word, matching common headline style.
| Term | Meaning |
|---|---|
| UPPER CASE | Every letter converted to its capital form. |
| lower case | Every letter converted to its small form. |
| Title Case | The first letter of each main word capitalised, with short joining words left lower case unless they start or end the line. |
The inputs explained
| Field | What to enter |
|---|---|
| Text to convert | Paste or type the text you want to convert. Punctuation and line spacing are kept as entered. |
| Convert to | Choose which case to convert the text into. |
When to use it
Cleaning up pasted text
Text copied from a spreadsheet or old document sometimes arrives in all capitals or with inconsistent casing; converting it to lower case first gives a clean base to work from.
Formatting a heading
A subheading or button label that needs to stand out in a design often calls for UPPER CASE, without retyping the whole phrase by hand.
Writing a title or headline
Title Case mode handles the fiddly part of headline capitalisation, lower-casing small words like "of" and "the" in the middle of a title while still capitalising the first and last word.
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How each mode converts the same sentence
The same short sentence run through all three conversion modes.
| Mode | Converted text |
|---|---|
| UPPER CASE | THE STATE OF STATGARDEN CALCULATORS |
| lower case | the state of statgarden calculators |
| Title Case | The State of Statgarden Calculators |
Questions
Does Title Case know proper nouns or brand names?
No. It capitalises the first letter of every word except a short list of common joining words, and has no way to know that a particular word is a brand name that should keep unusual internal capitalisation. Check proper nouns and acronyms by hand afterwards.
What counts as a small word that stays lower case in Title Case mode?
A short list of common articles, conjunctions and prepositions, such as "a", "an", "and", "the", "of", "in" and "or". Any of these are still capitalised if they happen to be the first or last word of the text.
Is this the same as the title case converter elsewhere on the site?
It covers the same Title Case transform plus two more: converting straight to all UPPER CASE or all lower case. Use whichever tool has the mode you need; the underlying Title Case logic is the same.
Does converting case affect numbers or punctuation?
No. Numbers, punctuation and spacing pass through unchanged; only alphabetic characters have their case changed.
For headline-style Title Case with more detail on the AP style rule it follows, see the Title Case Converter.