Case conversion is formatting, not editing.

Reviewed November 2026 · Practical guidance for reviewing transformed text.

Changing capitalization is useful when a heading arrived in all caps, a copied note is inconsistent, or a draft needs a quick visual reset. It is also easy to over-trust because the output looks finished even when the converter cannot know the meaning of every word.

Sentence case makes a practical default

Sentence case usually capitalizes the first word of a sentence and leaves the rest in lower case. It is common in readable interface labels and many editorial styles. A simple browser converter identifies sentence boundaries from punctuation, so abbreviations, initials, quotations and unusual punctuation can confuse it.

Title case depends on a style guide

Title case is not one universal rule. Some guides capitalize short connecting words; others leave them lower case except at the beginning or end. A simple converter can apply a consistent rule, but it cannot know whether your organization prefers “Guide to Writing” or “Guide To Writing.”

Names and acronyms need a human check

Words such as NASA, iPhone, eBay, SQL and place names often carry intentional capitalization. Converting a passage to lower case can erase that distinction. Product names and quoted titles deserve the same review.

Use a two-pass routine

1. Convert a copy of the text, not your only original.
2. Scan names, acronyms, code, URLs and quoted material.
3. Compare the result with the source before publishing.