Text Splitter (Split Text into Chunks)

Long text often has to be cut into smaller pieces: a thread of posts under a character limit, SMS-sized messages, chunks for a form or a translation tool, or a list made out of comma-separated data. This splitter cuts text every N characters (without breaking words), every N words or lines, into N equal parts, at sentences or paragraphs, or at any delimiter or regular expression. Each part can be labelled “Part 1/5”, and a table shows the length of every part.

How to use this tool

1. Paste the text.
2. Choose how to split: by characters, words, lines, equal parts, sentences, paragraphs, a delimiter or a regex.
3. Enter N or the delimiter, and keep “break only between words” on for readable parts.
4. Optionally label the parts, then copy the result; the table shows each part’s size.

Formula

Characters: fill each part with whole words while length ≤ N · Equal parts: cut near positions k × L ÷ N, moved to the nearest space

Lengths are counted in user-perceived characters, so an emoji with a skin tone or a Korean syllable counts as one and is never cut in half. A word longer than N characters is split on its own. Sentence mode uses the browser’s built-in sentence rules, which know about abbreviations in many languages; paragraph mode splits at blank lines. In delimiter mode \n and \t stand for a line break and a tab, and regex mode uses JavaScript regular expressions with Unicode support; a repeat inside a repeat, such as (a+)+, or a repeated choice whose options can match the same text, such as (a|aa)+, is refused unless you tick “Allow risky patterns”, because it can freeze the page. Empty parts are dropped.

Example

The default 248-character text split every 100 characters at word boundaries gives 3 parts of 97, 95 and 54 characters, so no word is cut. Split into sentences instead, it gives 4 parts, one per line.