Create a Custom CSV File
Generate a custom CSV file with m rows and n columns. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Create a Custom CSV File
- 1. Set the grid size. This is a generator, so start with the settings: Data rows and Columns define the m by n shape of the table you want to produce.
- 2. Write the cell template. The Cell value field is a template applied to every cell, with {row} and {col} replaced by each cell's coordinates. A template of r{row}c{col} yields r1c1, r1c2 and so on across the grid.
- 3. Optionally add a header. Tick Add a header row for column1 through columnN labels above the data. Skip it when you need pure data cells with predictable coordinates from line one.
- 4. Copy the generated grid. The output pane holds your finished table. Copy it into tests, docs or any tool that needs a CSV of exactly known dimensions and contents.
When to use Create a Custom CSV File
Create a Custom CSV File builds a deterministic m by n table where you control every cell through a template. Where random generators give you plausible noise, this gives you predictable, self-describing cells, which is exactly what assertions and coordinate debugging require.
- Writing precise parser tests. A unit test needs to assert that cell (3, 2) was read correctly. Generate a grid where each cell literally names its coordinates, and assertions become trivially self-evident.
- Debugging column mapping. Somewhere in a pipeline, columns get transposed. Run a coordinate-labeled grid through it and the output immediately shows which position ended up where.
- Producing filler with an exact shape. A layout demo needs a 20 by 8 table, contents irrelevant but size exact. Set the dimensions, use any template, and the table is ready in seconds.
- Generating sequential placeholder values. You need cells like item-{row} to prototype a numbered list import. The template mechanism produces the sequence without a spreadsheet fill-down session.
Examples
A 2×2 grid of cell coordinates
Output
column1,column2 r1c1,r1c2 r2c1,r2c2
About the Create a Custom CSV File tool
Create a Custom CSV File does its work locally, right in the browser. Generate a custom CSV file with m rows and n columns. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the CSV Tools collection on EditSafely, a set of 133 small, focused CSV utilities that share the same instant, private workspace.
You can shape the output with 4 settings, including Data rows, Columns, Cell value ({row} and {col} are replaced) and Add a header row, 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.
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
Is Create a Custom CSV File 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.