Generate Random UTF8
Generate random UTF8 characters. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate Random UTF8
- 1. Set how many characters to generate. Enter How many characters to control the batch size, each one shown by its UTF-8 byte sequence in hex, like e2-98-83 for a multi-byte character.
- 2. Decide whether to show the character too. Turn on Show the character too to display the actual rendered character alongside its byte sequence, useful for visually confirming which glyph the bytes represent.
- 3. Copy the generated bytes. Set Separator to a space or newline, then copy the byte sequences and paste them into a test suite for a UTF-8 decoder or a byte-level comparison exercise.
When to use Generate Random UTF8
Generate Random UTF8 produces random characters shown as their UTF-8 byte sequence in hex, with an option to display the character itself, useful for testing any code that reads or writes UTF-8 encoded text at the byte level.
- Testing a UTF-8 decoding function. You wrote a function that decodes UTF-8 byte sequences back into characters, and want generated random multi-byte characters, with Show the character too enabled, to confirm the decoder output matches.
- Debugging a mojibake encoding issue. You are troubleshooting text that displays as garbled characters due to an encoding mismatch, and want sample byte sequences to trace through how a wrong encoding misreads valid UTF-8 bytes.
- Teaching variable-length UTF-8 encoding. You are explaining how UTF-8 uses one to four bytes depending on the character, and want live generated examples showing both the byte count and the resulting character side by side.
- Building network protocol test fixtures. You are testing that a network parser correctly handles multi-byte UTF-8 characters split across packet boundaries, and generated byte sequences give you realistic test input to simulate that scenario.
Examples
Ten random UTF-8 characters
Output
e2-98-83 e4-b8-ad f0-9f-98-80 ...
Show the character alongside its bytes
Output
☃=e2-98-83 中=e4-b8-ad ...
About the Generate Random UTF8 tool
Generate Random UTF8 does its work locally, right in the browser. Generate random UTF8 characters. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Random Tools collection on EditSafely, a set of 120 small, focused Random utilities that share the same instant, private workspace.
You can shape the output with 3 settings, including How many characters, Show the character too and Separator, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Generate Random UTF8 cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
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 do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
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.