Why does Thai not use full stops?

Thai orthography has no sentence-ending punctuation like a period. Words within a clause run together with no spaces, and a space is used instead to mark the boundary between phrases or sentences. A line break is a strong boundary.

How does this tool decide where a sentence ends?

It treats each line break as a boundary and each run of whitespace as a phrase or sentence boundary, counting each whitespace-separated Thai chunk as one unit. This matches how Thai NLP tools segment unlabelled text.

Is the repetition mark ๆ a sentence break?

No. The mai yamok ๆ (U+0E46) repeats the previous word and stays within a sentence, so the tool never treats it as a terminator. Likewise the paiyannoi ฯ marks abbreviation, not a sentence end.

What if I mix in periods or question marks?

If the text contains . ! ? or full-width 。！？, the tool honours them as explicit sentence terminators and uses whichever heuristic yields the higher count, so it never under-counts mixed-script writing.

Does the tool upload my text?

No. All counting runs locally in your browser, so nothing you paste is sent to a server. It is safe for private or unpublished Thai text.

Thai Sentence Counter

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Thai is unusual: it has no sentence-ending punctuation. Within a clause the words run together with no spaces at all, and then a single space is used to mark the boundary between phrases or sentences. A line break is the strongest boundary. This makes counting Thai sentences a segmentation problem rather than a punctuation-splitting one.

How it works

The counter uses the standard Thai segmentation heuristic:

A line break is a sentence boundary.
A run of whitespace between Thai chunks is a phrase or sentence boundary, so each whitespace-separated chunk is counted as one unit.
The repetition mark ๆ (mai yamok) and the abbreviation mark ฯ (paiyannoi) stay inside a sentence and never end one.

If you paste mixed-script text that includes ., !, ?, or the full-width 。！？, those are honoured as explicit terminators, and the tool reports the larger of the two heuristics so it never under-counts.

Example

The text:

ภาษาไทยสวยงามมาก ฉันชอบเรียนภาษาไทย

has one space in the middle, separating two phrases — so it counts as two sentence units. Each chunk of joined Thai characters is one unit.

Notes

Thai has no period; spaces and line breaks carry sentence boundaries.
The repetition mark ๆ and abbreviation mark ฯ are never treated as terminators.
Counts are approximate by nature because Thai sentence boundaries are context-dependent.
Everything runs locally; your text never leaves the browser.