What is the Sentence Case Converter?

The Sentence Case Converter reformats text the way normal prose reads: the first letter of each sentence is capitalized and everything else is lowered, so "THIS IS IMPORTANT. PLEASE READ." becomes "This is important. Please read." It detects sentence boundaries at periods, exclamation marks and question marks.

It earns its keep cleaning up the two most common capitalization disasters — text typed entirely in caps and text pasted from shouty headlines. Editors, students and support agents use it to turn aggressive-looking blocks into calm, readable paragraphs in seconds.

How to use

1. Paste the all-caps or inconsistently capitalized paragraph into the input box.
2. Click convert — the tool lowercases everything, then re-capitalizes the letter following each sentence terminator.
3. Read through once to fix proper nouns the converter could not know about, such as names mid-sentence.
4. Copy the cleaned paragraph into your essay, email or ticket reply.

Common use cases

• Email triage — defusing all-caps customer messages into neutral text before responding.
• Essay cleanup — normalizing drafts where headings or copied quotes arrived in uppercase.
• Chat transcripts — making pasted conversations readable for reports and documentation.
• Form submissions — standardizing user-entered descriptions that arrive in random capitalization.

Example

Input:
THIS IS IMPORTANT. PLEASE READ CAREFULLY BEFORE SIGNING.

Output:
This is important. Please read carefully before signing.

FAQs

How does the tool know where sentences end?

It splits on the standard terminators — period, exclamation mark and question mark — followed by whitespace. Anything between two such splits counts as one sentence and gets exactly one capital at its start.

Will it lowercase proper nouns like "London"?

Honestly, yes, if they sit mid-sentence — the converter has no dictionary of names, so "i visited London last year" becomes "I visited london last year." A quick manual pass over names is the expected final step.

What happens with abbreviations like "Dr." or "e.g."?

Periods inside abbreviations are read as sentence ends, so "meet Dr. Smith at 5 p.m." may split into extra fragments. For abbreviation-heavy text, convert first and rejoin the false splits afterward.

How is sentence case different from lowercase?

Lowercase flattens every letter including sentence starts. Sentence case keeps the natural reading rhythm — capital to open, lowercase through the body — which is why it suits anything a human will actually read.