Find Unique Words in Text
List the words that appear exactly once in the text. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Find Unique Words in Text
- 1. Paste your text. Enter the passage you want to check for one-off words into the input pane. The tool tokenizes on spaces and punctuation to identify individual words.
- 2. Choose Case sensitive if needed. Turn on Case sensitive to treat 'Word' and 'word' as different tokens. Leave it off, the default, to merge different capitalizations when deciding whether a word repeats.
- 3. Read the list of unique words. The output lists every word that appears exactly once in the text, in the order it was found, letting you spot which terms show up only a single time.
When to use Find Unique Words in Text
Find Unique Words in Text lists every word that appears exactly once, sometimes called hapax legomena, in a passage. Reach for it when you need to spot rare or one-off terms rather than the words that dominate the text.
- Spotting a typo or rare term in a manuscript. A word that appears only once in a long document is often either a deliberate rare term or a misspelling of a more common word. List unique words to review each candidate.
- Studying vocabulary richness in a text. A linguistics or writing analysis wants to see how many words in a sample are used only once, as one signal of vocabulary variety versus repetition. Paste the sample and review the list.
- Finding candidate keywords for a glossary. You're building a glossary from a technical document and want to find specialized terms that appear only once, since those are often the ones needing a definition. Scan the unique-word list.
Examples
Words used only once
Input
the cat and the dog
Output
cat and dog
About the Find Unique Words in Text tool
Find Unique Words in Text is a free online tool that works entirely inside your web browser. List the words that appear exactly once in the text. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 211 Text utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Case sensitive setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Find Unique Words in Text cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.