Exact counts and post limits. Count words, characters, sentences and paragraphs exactly, and check text against the real limits of the platforms you post to.
https://plugins-worker.demos.42a.ai/word-counter/mcpSettings → Security and login → Developer mode → chatgpt.com/plugins → + → paste the URL. After a tool change: Refresh, then a new chat.
| Prompt | Tool | Expected |
|---|---|---|
| How many words and characters is this: I can't believe it's already 2026! Our well-known café opened in 1998, and we've served 12,500 cups since. 😀 Come visit. | count_words | Card shows 20 words, 120 characters (100 without spaces) and 3 sentences: contractions, "well-known" and "12,500" each count once, the emoji counts as one character. |
| Will this fit on X and Threads? "Just shipped v2.0 of our open-source parser! Read the release notes: https://github.com/example/parser/releases/tag/v2.0.0 🚀" | count_words | 12 words (the link counts as one); X counts 95 of 280 (the link counts 23, the rocket 2), 185 left; Threads 124 of 500. Both fit. |
| Check this meta description length: Learn how to brew perfect pour-over coffee at home with our step-by-step guide, covering grind size, water temperature, ratios, and the gear you actually need to get started today. | count_words | 180 characters, 29 words: 20 over the ~160 meta description guideline (the cut falls in "need to", so what fits ends at "actually need"), and 90 over a Google Ads description. |
| How many SMS segments is this? Hi Maria, your table for 4 is booked for Friday at 7:30 pm. Reply YES to confirm or call us to change it – thank you! | count_words | 117 characters and 25 words; the en dash is not in the GSM-7 alphabet, so it sends as Unicode (70 per SMS) in 2 segments. A plain hyphen would make it 1 SMS. |
| Does this fit a 25-word limit? Cold brew coffee is smooth and sweet. To make cold brew coffee, steep coarse grounds in cold water for 16 hours. Strain it, chill it, and serve the coffee over ice. | count_words | 31 words in 3 sentences, 6 over the 25-word limit (what fits ends at "Strain it, chill it"); top keywords "coffee" and "cold" (3 each, 9.7%). |
| Write me a 280-character tweet announcing our new product. | none | Writing new text is the model's job; counting only applies once there is text to check. |
| Translate this paragraph into Spanish. | none | Translation needs no counting. |
| How many items are on my grocery list: eggs, milk, bread? | none | Counting list items is trivial and not a text-length question. |