Create a Large CSV File instantly in your browser by setting the number of rows and column names. Generate mock data, preview it, and export with one click.
How to Use:
- Enter how many rows you want in the Number of rows box.
- In the Columns field, list the column headers separated by commas. For example:
id,name,email. - Click Generate to build the CSV content. The tool fills each row with simple placeholder data like
User1,[email protected], and so on. - The output updates immediately and flashes blue to confirm the change.
- Use Copy Output to copy the generated CSV to your clipboard.
- Click Export to File to download the CSV file directly.
- Hit Clear All to reset the column names, row count, output box, and character counter.
- Check the Total characters counter below the output to monitor file size in real time.
What Create a Large CSV File can do:
Create a Large CSV File helps you generate massive amounts of mock data quickly great for testing imports, benchmarking performance, or building demo datasets. You choose the column headers and how many rows you want, and the tool does the rest. It outputs structured CSV using synthetic values, and you can instantly export it or copy it wherever you need. It’s fast, browser-based, and requires no spreadsheet software or downloads.
Example:
Settings:
- Number of rows:
3 - Columns:
id,name,email
Generated Output:
id,name,email
1,User1,[email protected]
2,User2,[email protected]
3,User3,[email protected]Common Use Cases:
Use Create a Large CSV File when you need mock CSVs for API testing, form submission stress tests, spreadsheet prototyping, or populating UI elements. It’s also handy for developers building file upload tools or QA teams testing CSV validators.
Useful Tools & Suggestions:
After generating your file, Analyze CSV gives you a quick overview of what’s inside and how it’s structured. And if the size becomes a problem, Compress a CSV File helps shrink it down without deleting anything.