Generate a Singular Matrix
Degenerate matrix (determinant = 0). 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 Singular Matrix
- 1. Set the matrix size. Enter Size for the dimension of the square matrix. A 3x3 or 4x4 singular matrix is a common size for row-reduction and determinant practice.
- 2. Choose the element separator. Set Element separator to a space, comma or tab to match wherever you plan to paste the result, such as a spreadsheet, plain text file or CSV.
- 3. Copy the generated matrix. Copy the matrix, where the last row is built as a combination of the others so the determinant comes out to zero, into a linear algebra tool or homework document.
When to use Generate a Singular Matrix
Generate a Singular Matrix produces a square matrix guaranteed to have a determinant of zero, meaning it has no inverse. It is for exercises and tests that specifically need a degenerate matrix, rather than hoping a random matrix happens to be non-invertible.
- Writing a determinant practice problem. Students practicing determinant calculation by hand can verify their answer comes out to exactly zero, confirming both their arithmetic and their understanding of what makes a matrix singular.
- Testing matrix inversion error handling. A linear algebra library's inversion function should detect and reject singular matrices. A guaranteed singular test case confirms that error path actually triggers rather than silently returning garbage.
- Teaching linear dependence among rows. Since the last row is built as a sum of the others, this matrix directly demonstrates linear dependence, a concept that connects singularity to the rows or columns not being independent.
- Illustrating why some systems of equations have no unique solution. A singular coefficient matrix corresponds to a system of linear equations with either no solution or infinitely many, making this a useful example when introducing that idea.
Examples
A singular 3×3 matrix (last row = sum of the others)
Output
4 -2 7 1 5 -3 5 3 4
A singular 2×2 matrix (rows are equal)
Output
6 -8 6 -8
About the Generate a Singular Matrix tool
Generate a Singular Matrix is a free online tool that works entirely inside your web browser. Degenerate matrix (determinant = 0). Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 234 Math 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 2 settings, including Size and Element 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
Does Generate a Singular Matrix 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.