Capitalization Tool - Complete v3.2 Rules
All capitalization rules from "How to Capitalize Anything"
What This Tool Does
This free capitalization tool checks your text against standard capitalization rules — proper nouns, titles, days, months, holidays, languages, religions, military titles, and more. It flags errors and shows you exactly what changed and why.
What It Doesn't Do
The tool cannot lowercase words that are already capitalized when they shouldn't be. For example:
Extensive expertise in Regulatory, Quality, and Manufacturing Operations, ranging from start-up to Fortune 500 companies.
The words Regulatory, Quality, and Manufacturing Operations are capitalized but shouldn't be — they're not proper nouns. The tool won't flag those because it only raises words up, it doesn't bring them down.
The Three Modes
Standard Mode applies general capitalization rules — proper nouns, places, days, months, holidays, languages, and more. Use this for most writing.
Title Case Mode capitalizes the first and last word plus all major words in a title, leaving short prepositions and articles lowercase. Use this when writing book, movie, or song titles.
Resume Mode applies standard rules and also converts ALL CAPS section headers — EXPERIENCE, EDUCATION, SUMMARY — to proper title case, while leaving known acronyms like FDA, ISO, and GMP intact.
Match Known Titles
Check the box below to enable matching against a database of well-known book, movie, and TV show titles. Leave it unchecked for general writing — enabling it on non-title text may cause false positives.
Match Animal Breed Names
Check the box below to enable matching against an extended database of animal breed names covering cats, dogs, horses, cattle, sheep, goats, pigs, poultry, and donkeys. The tool applies correct capitalization based on whether the breed name derives from a proper noun. Leave this unchecked for general writing.
Lowercase First Button
The Lowercase First button converts all text in the box to lowercase before you run it through the tool. This is useful on resumes, where a large number of capitalization errors tend to occur. However, do not use it on the entire resume at once. Use it only on specific sections — Summary, Accomplishments, Responsibilities, and similar descriptive sections. Do not use it on sections where company names, job titles, or proper nouns appear, as those will be lowercased and the tool may not be able to restore them correctly.