How to Paste Very Large Data in Excel

Very large data, the kind that runs into the tens of millions of rows, puts real strain on Excel, since a single worksheet cannot hold more than 1,048,576 rows regardless of how the data is structured.

Million by Million Rows Copier is designed for exactly this scale. It stores up to 50,000,000 rows in a local SQLite file rather than in memory, which keeps the app responsive even with data sets far beyond what Excel could open directly.

The data is handed back out in 1,000,000-row chunks through Copy Next Chunk, so pasting very large data becomes a matter of repeating one simple action across as many sheets as needed, rather than a single overwhelming operation.

A virtual scrolling preview grid also lets you check the data before copying it out, so you can confirm everything loaded correctly even when the dataset is too large to scroll through in Excel itself.

1. Load your very large dataset into Million by Million Rows Copier.
2. Use the preview grid to spot-check the data once loading completes.
3. Click Start Copying to begin generating chunks.
4. Click Copy Next Chunk and paste into a fresh Excel worksheet.
5. Continue through each chunk until the entire dataset has been pasted.

• Supports up to 50,000,000 rows, well beyond a single worksheet's capacity
• 1,000,000-row chunks keep every paste fast and reliable
• Virtual scrolling preview grid handles very large row counts smoothly
• Loads more than 25 formats commonly used for exporting big data
• Background threads prevent the interface from locking up during long loads
• Auto-saved chunk files provide a complete backup as you work