Sentence Splitter
| Shielded | Example | Why |
|---|---|---|
| Titles | Mr. Dr. Prof. St. | abbreviations, not sentence ends |
| Latin | e.g. i.e. etc. | dots inside the abbreviation |
| Decimals | 3.14, 1.5 | numbers keep their points |
| Initials | J. K. Rowling | single-letter dots shielded |
Paste a wall of text and this splitter breaks it into sentences - one per line, ready for translation tools, text-to-speech pipelines, subtitle timing or plain close editing. The splitter knows the difference between a sentence end and an abbreviation: Mr. and Dr. stay whole, decimals like 3.14 don't break, and e.g.-style Latin keeps its dots.
Everything runs in this browser tab: nothing uploads, the count updates live, and each sentence carries its number so you can reference line three in a comment. Blank lines between paragraphs survive as separators, so multi-paragraph text keeps its shape while every sentence inside gets its own line.
How to use
- Paste your text - sentences appear one per line with a running count.
- Scan for false splits (rare abbreviations the rules don't know) and rejoin by hand in your target tool if needed.
- Copy the whole block; the one-per-line layout pastes into translation sheets and subtitle grids directly.
Frequently asked questions
How does the sentence splitter work?
It treats a sentence as text ending in a period, question mark or exclamation point, followed by whitespace and a new capitalized word. Before splitting, it shields the common false ends: titles like Mr., Mrs., Dr., Prof. and St., Latin abbreviations like e.g. and i.e., and decimals like 3.14. What survives the shield is a real sentence boundary.
Why split text into one sentence per line?
Because sentence-aligned text is the working format of half the language industry: translation memory tools, text-to-speech pipelines, subtitle timing, grammar checkers and close-editing workflows all want one sentence per row. It is also simply the best way to proofread - errors hide in paragraphs and stand out in a column of sentences.
Will it split Mr. Smith in half?
Not the common cases - Mr., Mrs., Ms., Dr., Prof., St., Jr., Sr. and the Latin pair e.g. and i.e. are all shielded, as are decimal numbers. English has a long tail of edge cases (ellipsis mid-sentence, quoted speech ending in a period, initials like Harry S. Truman), so scan the output once - a false split is visible instantly in the one-per-line layout and trivial to rejoin.
Is my text uploaded anywhere?
No. The split runs entirely in this browser tab - no server, no logging, no account. Your text stays in the page's local storage on your own device (up to 20,000 characters) so a refresh does not lose it, and nothing leaves your machine unless you copy it out yourself.
What about quoted speech and abbreviations I use a lot?
A sentence ending inside quotation marks counts as ended - the splitter follows the punctuation, not the quote depth, which matches how translation tools expect text. If your documents repeat a special abbreviation the shield doesn't know, split first and fix by hand: the one-per-line layout makes every false boundary a one-line fix instead of a treasure hunt.