Generate Random Bytes
Quickly generate random bytes. 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 Bytes
- 1. Set how many bytes. Enter How many bytes to decide how many individual byte values the generator returns in one batch.
- 2. Choose the display format. Pick Hexadecimal (00-ff), Decimal (0-255), or Binary (8 bits) depending on how you need each byte represented in the text output.
- 3. Set a separator. Choose Separator, a comma or newline, so the bytes come out formatted the way your script, log viewer, or worksheet expects.
- 4. Copy the bytes. Copy the resulting byte values into your project. Each run generates a fresh, independent set.
When to use Generate Random Bytes
Generate Random Bytes produces a list of individual byte values in hex, decimal, or binary, giving you raw byte-level randomness for testing or demonstration without a full file to decode.
- Testing a checksum or hash preview. A developer building a tool that displays byte-level data, like a hex dump viewer, wants sample byte values to confirm formatting and spacing render correctly.
- Generating a sample encryption key preview. Someone building an educational demo about key length wants a random-looking sequence of bytes to illustrate what a 128-bit or 256-bit key looks like in hex.
- Practicing byte format conversion. A student learning how a byte's value maps between hex, decimal, and binary representation wants random values to convert and check by hand.
- Seeding placeholder binary data in a spreadsheet. Someone preparing sample data for a networking or firmware course wants a column of random byte values in decimal to reference in an exercise.
Examples
Sixteen random bytes in hex
Output
a3, 1f, c0, 7e, ...
Bytes as decimal numbers
Output
163, 31, 192, 126
About the Generate Random Bytes tool
Generate Random Bytes does its work locally, right in the browser. Quickly generate random bytes. 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 bytes, Format 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 Bytes 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.