Generate Random UTF8
Quickly generate random UTF8 data. 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 a value for How many characters. The generator picks that many random Unicode characters and encodes each one to its UTF-8 byte sequence.
- 2. Decide whether to show the character. Turn on Show the character too if you want each byte group labeled with the rendered symbol it decodes to, which makes the output easier to scan than raw bytes alone.
- 3. Set a separator. Type the separator that should sit between each character's byte group, such as a space, so the layout matches whatever test file or fixture you are building.
- 4. Copy the output. Take the generated byte sequences into a test fixture, sample dataset or anywhere you need believable, varied UTF-8 content without hand-typing it.
When to use Generate Random UTF8
Generate Random UTF8 creates a batch of random characters and shows the UTF-8 bytes each one encodes to. It is a quick way to get varied, multi-byte Unicode content for testing without hunting down specific symbols yourself.
- Seeding a text rendering test. You are checking that a font or terminal renders a wide variety of code points correctly and want a batch of random characters spanning different byte lengths to sample against.
- Filling a load test fixture. A load testing script needs realistic multi-byte string payloads rather than plain ASCII placeholders, so the timing numbers reflect what production traffic with international text would look like.
- Exploring the character-to-byte mapping. You are learning how UTF-8 encodes different ranges of characters and want to generate a handful of random examples with the character shown alongside its byte encoding.
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 is a free online tool that works entirely inside your web browser. Quickly generate random UTF8 data. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 69 UTF-8 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 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.
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
Is Generate Random UTF8 free to use?
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?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
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?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
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.