Generate a Unit Matrix
Quickly create a diagonal matrix with ones on the main diagonal. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate a Unit Matrix
- 1. Set Size (n). There's nothing to paste here. Start by choosing the dimension under Size (n), which determines how many rows and columns the matrix has.
- 2. Set the Element separator. Choose the character placed between values in each row, such as a single space, matching the format you need the matrix output in.
- 3. Copy the unit matrix. Copy the generated matrix, such as the 3 by 3 unit matrix with ones on the diagonal and zeros elsewhere, from the output pane into your linear algebra work.
When to use Generate a Unit Matrix
Generate a Unit Matrix produces an identity matrix of any size, with ones down the main diagonal and zeros everywhere else. It's the matrix that leaves any other matrix unchanged when multiplied against it.
- Setting up a matrix inversion problem. You're solving for a matrix's inverse using row reduction and need the identity matrix of the correct size to augment alongside your original matrix.
- Checking a linear algebra homework setup. An assignment requires writing out the identity matrix for a specific dimension, and generating it here confirms you have the right size and layout.
- Initializing a transformation matrix in graphics code. You're setting up a starting transformation matrix in code, like for 3D graphics or robotics, and need the identity matrix as your baseline before applying rotations or scales.
- Demonstrating what the identity matrix looks like. A linear algebra lesson needs a clean, correctly sized example of the identity matrix to show alongside a discussion of matrix multiplication.
Examples
The 3×3 unit matrix
Output
1 0 0 0 1 0 0 0 1
About the Generate a Unit Matrix tool
Generate a Unit Matrix runs as plain JavaScript in your browser tab, with no server behind it. Quickly create a diagonal matrix with ones on the main diagonal. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Number Tools section, 194 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 2 settings, including Size (n) and Element separator, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Generate a Unit Matrix 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.