Generate Excel File with Specified Number of Rows Online

Generate excel file with specified number of rows and download free

In daily data analysis, system testing, performance benchmarking, and data import/export drills, there is often a need to quickly build Excel spreadsheet files containing a specified number of rows. This online tool requires no third-party software, Python scripts, or Excel macros—it creates large-capacity .xlsx files with 100, 10,000, or even 1,000,000 (1 million) rows directly in your browser with one-click fast download.

How to Use

Advanced Usage: Data Population, Batch IDs, Random Values, Expression Interpolation

Beyond generating basic spreadsheets, this tool provides powerful column data generation rules and dynamic interpolation expressions to handle complex real-world testing and business simulation scenarios:

• Batch Rule Numbers and IDs:

  Select "Custom Template" and enter an expression. For example, using NO_{rowIndex} generates sequential IDs like NO_1, NO_2...NO_100000; using ORDER_2026_{rowIndex} builds order tracking numbers.

• Simulating Test Accounts & Emails:

  When batch generating test user accounts, use user_{rowIndex} for usernames and user_{rowIndex}@test.com for test email addresses.

• Texts with Units, Prefixes, or Suffixes:

  Enter Rank #{rowIndex} for ranking tests, or ${rowIndex}.00 for monetary data simulations.

• Random Numbers & Characters:

  Combine "Random Number" (generates 6-digit random numeric values like 583921) and "Random Characters" (generates 8-character random alphanumeric strings like A8f9X2kL) to simulate User IDs, transaction numbers, verification codes, API keys, or hashes.

• Multi-Column Composite Modeling:

  Click "Add Column" to build multi-dimensional tables. For example: Column 1 as Row Number (User ID), Column 2 as Template User_{rowIndex} (Name), Column 3 as Random Number (Points), Column 4 as Random Characters (Coupon Code). You can build a 1-million-row test dataset in seconds.

Key Features & Advantages

• No Row Limit: Free to set any row count from thousands for small tests to millions for big data performance benchmarking.
• Customizable Data Columns: Flexibly add or delete columns and customize population modes (auto-increment row numbers, blanks, random numbers, random strings, and custom template expressions with {rowIndex}).
• Client-Side In-Browser Generation: Powered by WebAssembly and Web Worker multi-threading, file generation and packaging happen entirely in your browser without lag, ensuring maximum privacy and data security.
• Fully Compatible with Major Office Software: Standard OpenXML (.xlsx) files are 100% compatible with Microsoft Excel, Google Sheets, WPS Office, and other spreadsheet software.

Common Use Cases

• System Performance & Test Data Preparation: Quickly create large files (hundreds of thousands of rows) to test data import interface throughput and performance bottlenecks.
• Office Automation & Template Demonstrations: Build spreadsheets with rule-based text and sample data.
• Data Cleaning & Format Validation: Validate format conversion and parsing rules under heavy data loads alongside other Excel tools.