Create a Random CSV
Generate a random CSV of any size. 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 Random CSV
- 1. Choose the dimensions. There is nothing to paste; set Data rows and Columns to the size of table you need. A 10 by 4 grid is enough for most quick tests, but the generator scales far beyond that.
- 2. Pick the value style. The Values setting fills cells with Mixed content, Words only or Numbers only. Choose Numbers when downstream code does arithmetic, Words when you want readable text, Mixed for a realistic blend.
- 3. Add a header if needed. Tick Add a header row to prepend column1, column2 and so on. Most parsers and spreadsheet imports behave better when a header is present.
- 4. Copy your test data. Copy the generated CSV from the output pane. Regenerate for a fresh dataset any time; each run produces different random values.
When to use Create a Random CSV
Create a Random CSV manufactures throwaway tabular data on demand. When you are building or testing anything that consumes CSV, you need input files constantly, and real data is often private, oversized or simply not at hand. This generator gives you plausible rows in one click.
- Testing an upload feature. Your web app just grew a CSV import form. Generate files of various shapes, wide, tall, words-only, numeric, and confirm the parser and progress bar behave on each.
- Filling a demo environment. A sales demo needs a populated table but no customer data can appear. Random rows with a header look believable on screen and carry zero privacy risk.
- Reproducing a bug without real data. A parser fails on files around a certain size, but the triggering file is confidential. Generate a random CSV with the same dimensions and attach it to the bug report instead.
- Teaching or writing documentation. A tutorial on data cleaning needs example input readers can copy. Generated random data avoids licensing questions and never accidentally leaks a real name.
Examples
Ten rows, four columns
Output
column1,column2,column3,column4 cedar,42,willow,17 …
About the Create a Random CSV tool
Create a Random CSV is a free online tool that works entirely inside your web browser. Generate a random CSV of any size. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 133 CSV 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 4 settings, including Data rows, Columns, Values 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.
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 Create a Random CSV 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.