This tool scans any block of text and ranks its longest words by character count, longest first. It is useful for spotting unusually long or technical terms, checking readability, finding tongue-twisters and reviewing whether copy uses overly complex vocabulary. You choose how many of the top words to display.
How it works
The text is split into words using a Unicode-aware pattern that treats any run of letters, numbers, apostrophes or hyphens as one word (so “well-known” and “don’t” stay intact). Words are then de-duplicated case-insensitively — the first casing seen is kept — so each distinct word appears once in the ranking.
Each word’s length is measured by counting Unicode code points, which means accented and non-Latin characters each count correctly as one. The list is sorted by length (longest first), with alphabetical order breaking ties, and the top N words are shown.
Worked example
Given the text “Pneumonoultramicroscopicsilicovolcanoconiosis is a long word, but antidisestablishmentarianism is well known too.” the top results are:
| Rank | Word | Length |
|---|---|---|
| 1 | Pneumonoultramicroscopicsilicovolcanoconiosis | 45 |
| 2 | antidisestablishmentarianism | 28 |
| 3 | known | 5 |
The two famously long words rise to the top, and shorter words follow by length then alphabetically.
Practical uses
Readability review. The Flesch–Kincaid and similar readability formulas penalize long words. If the top of your ranking is full of six-syllable words, that is a reliable signal that a passage is harder to read than it needs to be. Simplifying the longest terms often lifts readability scores noticeably.
Technical writing and style. Editors use longest-word lists to spot jargon that leaked into plain-language documents. A legal brief, a medical consent form, or a government notice might read fine to a specialist but overwhelm a general audience. Surfacing the top-10 longest words in a section gives an instant jargon check.
Games and puzzles. Word games, crossword setters, and puzzle designers sometimes need to find the longest word in a passage or verify that a word they have chosen is genuinely the longest in a given corpus. Paste the text and the answer is immediate.
Translation and localization. Languages like German regularly produce compound words of 30+ characters that blow out UI layouts. Pasting translated copy into this tool and checking for extreme outliers helps catch layout-breaking strings before they reach production.
Tongue-twister and linguistic curiosity. The famous 45-letter “pneumonoultramicroscopicsilicovolcanoconiosis” (a lung disease caused by inhaling silica dust) and the 28-letter “antidisestablishmentarianism” (opposition to disestablishing the Church of England) are familiar examples. The tool finds them — and lesser-known long words — instantly.
What counts as a word
The tool treats any continuous run of letters, digits, apostrophes, or hyphens as a single word. This means:
don'tcounts as one 5-character word, not two.well-knowncounts as one 9-character word.COVID-19counts as one word.- Pure numbers like
2024are included (useful for data-heavy text). - Punctuation like periods, commas, and quotation marks are treated as separators.
Everything runs locally in your browser — nothing is uploaded, so your text stays private.