Find Unique Letters in Text
List the letters that appear exactly once in the text. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Find Unique Letters in Text
- 1. Paste your text. Enter a word, name or short passage into the input pane. The tool examines every letter individually rather than grouping them into words.
- 2. Choose Case sensitive if needed. Turn on Case sensitive to treat 'A' and 'a' as different letters. Leave it off, the default, so uppercase and lowercase versions of the same letter are merged before counting.
- 3. Read the list of unique letters. The output lists every letter that occurs exactly once in the text, in the order it first appears, so you can see which letters are not repeated.
When to use Find Unique Letters in Text
Find Unique Letters in Text lists every letter that appears exactly once in a string. It is handy for word games, cipher work and any puzzle that hinges on which letters are not repeated.
- Solving a word game with letter constraints. Some word puzzles ask for a word made entirely of letters that appear only once, an isogram. Check candidate words here to confirm they qualify before submitting an answer.
- Checking a pangram or lipogram draft. You're writing a pangram that should use every letter at least once, or a lipogram that avoids repeating a specific letter. List unique letters to verify your draft meets the constraint.
- Analyzing letter usage for a cipher. Before designing a substitution cipher exercise, you want to know which letters in a sample sentence are singletons, since those are easier for solvers to guess first.
Examples
Letters used only once
Input
hello
Output
h e o
About the Find Unique Letters in Text tool
Find Unique Letters in Text is a free online tool that works entirely inside your web browser. List the letters 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 Letters 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.