Convert CSV to a Matrix

Convert CSV to a Matrix instantly. Turn CSV data into a bracketed matrix array with trim, numeric mode, live preview, and export functionality.

Paste your input above or import a file below.
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Supported file types: .csv, .txt, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total characters: 0
Options
Trim fields
Use numbers only
Maximize output

How to Use:

  • Paste your CSV into the CSV Input box or upload a .csv, .txt, or other plain text file using Choose File.
  • Enable Trim fields to remove whitespace around each cell before converting.
  • Use Use numbers only to strip quotes and output numeric cells as raw numbers (non-numeric values will become 0).
  • Turn on Maximize output to expand the output area for easier viewing.
  • The Matrix Output updates live as you type or change options. It flashes when refreshed.
  • Click Copy Output to copy the matrix or Export to File to download it as a .json file.
  • A Total characters counter is displayed below the output.
  • Click Clear All to reset all fields, toggles, and imported files.

What Convert CSV to a Matrix can do:

Convert CSV to a Matrix takes your CSV file and turns it into a JSON-style 2D array, perfect for use in JavaScript, Python, or any environment that works with matrices. You can format fields as quoted strings or plain numbers, and it supports trimming to clean up messy input. The entire process is browser-based, fast, and live no upload required.

Example:

Input:

1,2,3  
4,5,6  
7,8,9

Output (Trim on, Numbers off):

[["1", "2", "3"],
 ["4", "5", "6"],
 ["7", "8", "9"]]

Output (Numbers only on):

[[1, 2, 3],
 [4, 5, 6],
 [7, 8, 9]]

Common Use Cases:

Use Convert CSV to a Matrix when importing data into code, preparing arrays for testing, converting tabular data to structured format, or integrating with data pipelines. It’s especially helpful for developers, analysts, or students working with arrays.

Useful Tools & Suggestions:

Try Convert CSV to an Array of Arrays if you need the structure in a more programmable format first. And if you’re working toward visualization, Rotate CSV Rows can reshape the matrix for a better layout.

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