Split text into sentences with Sentence Boundary Detection (SBD).

Usage no npm install needed!

<script type="module">
  import ckirbySbd from 'https://cdn.skypack.dev/@ckirby/sbd';


Sentence Boundary Detection (SBD)

Split text into sentences with a vanilla rule based approach (i.e working ~95% of the time).

  • Split a text based on period, question- and exclamation marks.
    • Skips (most) abbreviations (Mr., Mrs., PhD.)
    • Skips numbers/currency
    • Skips urls, websites, email addresses, phone nr.
    • Counts ellipsis and ?! as single punctuation


Use npm:

$ npm install sbd

How to

var tokenizer = require('@ckirby/sbd');

var text = "On Jan. 20, former Sen. Barack Obama became the 44th President of the U.S. Millions attended the Inauguration.";
var sentences = tokenizer.sentences(text, optional_options);

// [
//  'On Jan. 20, former Sen. Barack Obama became the 44th President of the U.S.',
//  'Millions attended the Inauguration.',
// ]

Optional options

var options = {
    "preserve_whitespace" : false,
    "abbreviations"      : null
  • preserve_whitespace: Preserve the literal whitespace between words and sentences (otherwise, internal spaces are normalized to a single space char, and inter-sentence whitespace is omitted).
  • abbreviations: list of abbreviations to override the original ones for use with other languages. Don't put dots in abbreviations.


You can run unit tests with npm test.

If you feel something is missing, you can open an issue stating the problem sentence and desired result. If code is unclear give me a @mention. Pull requests are welcome.

Building the (minified) scripts

npm install -g browserify

npm run-script build