LaTeX Matrix Generator

ROWS, COLUMNS AND A LITTLE TEX

What is a LaTeX matrix?

A matrix arranges entries into rows and columns. LaTeX describes that structure with an environment, an ampersand & between columns and a double backslash \\ between rows. The bracket style changes its appearance; it does not calculate a determinant, inverse or norm.

This generator writes that structure for you. Fill each cell with a number or a mathematical expression, then inspect the actual MathJax preview. Empty cells become zero. You can build a row vector, a column vector or a matrix up to 12 × 12. The generated code groups each cell in braces so its math styling stays inside that cell.

Create a matrix in a few steps

1. Choose dimensions. Enter 1–12 rows and columns or choose a quick size. Shrinking the grid hides values; growing it again restores them within the 12 × 12 limit. Removing an individual row or column shifts the following entries.
2. Fill the cells. Enter values such as -2, x^2, \alpha or \frac{1}{2}. Presets replace the cells, with Undo available. Identity makes a square matrix using the larger current dimension; Diagonal uses 1, 2, 3… on the diagonal and zeros elsewhere.
3. Check the preview. Fix any highlighted cell before copying or exporting. The grid owns row and column separators; cells accept individual expressions, not nested environments, comments or alignment commands. The renderer supports the same base and AMS commands as the equation editor.
4. Copy or export. Copy LaTeX for a document, or choose SVG, PNG or PDF. Open in Equation Editor stages the matrix locally and asks before replacing the editor’s current source.

Use Tab to move across cells, Enter or ↑/↓ for vertical movement, and ←/→ at the ends of a cell’s text to reach its neighbors. Shift+Enter moves up. Tab from the final cell leaves the grid. Paste plain tab-separated spreadsheet cells at the focused cell; the grid grows to fit. A block extending past row or column 12 is rejected without changing the matrix. Ragged pasted rows fill missing entries with zero.

The builder saves one matrix locally when browser storage is available. It does not share the equation editor’s draft. Undo history is kept for this visit only. Keep your own copy of important LaTeX before leaving or clearing browser storage.

Choose a matrix environment

Capitalization matters: bmatrix and Bmatrix use different delimiters. A rectangular matrix can be typeset with bars, but a determinant has its usual meaning for square matrices. Choosing bars does not evaluate the entries. See the matrix notation guide for more examples.

Common matrix examples

A two-by-two identity matrix

Ones on the main diagonal and zeros elsewhere. Choose 2×2 and Identity to create this structure in the builder.

\begin{pmatrix}
{1} & {0} \\
{0} & {1}
\end{pmatrix}

A column vector with mathematical entries

Choose 3×1, then put one expression in each cell. Keep command arguments in braces, as in \frac{1}{2}.

\begin{bmatrix}
{\alpha} \\
{\frac{1}{2}} \\
{x^2}
\end{bmatrix}

For command help, read the symbol reference or fraction guide. The builder’s visual controls and presets change the grid; these source examples are ordinary selectable text you can copy into a document.

Use the generated code in a LaTeX document

Load amsmath in the document preamble, then paste the generated matrix inside a mathematical display such as \[ ... \]. Do not paste the document preamble or display delimiters into the MathTexLab equation editor; it expects mathematical source only.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[
\begin{pmatrix}
1 & 0 \\
0 & 1
\end{pmatrix}
\]
\end{document}

For 11 or 12 columns: standard amsmath documents normally allow 10 matrix columns. Add \setcounter{MaxMatrixCols}{12} after \usepackage{amsmath} in the preamble. This setup is separate from the copied matrix expression. MathTexLab’s MathJax preview supports the builder’s 12-column limit directly. A wide matrix may also need a smaller display size or a different page layout in its destination.

Syntax references: the amsmath user guide, Overleaf’s matrix reference and MathJax command index. Export choices are explained in the equation image guide.