Different Excel workbooks and workflows sometimes call for a different chunk size than the standard million rows, a smaller size for a workbook with heavy formatting, or a larger one if you're confident the destination sheet can handle more.
Million by Million Rows Copier copies Excel data by exact row count through its adjustable chunk size setting. Load your Excel data, by pasting with Ctrl+V or loading an XLSX or XLS file, set your desired row count per copy, from 1 to 10,000,000, then click Start Copying Out.
Copy Next Chunk then produces exactly that many rows per copy, with the header row included automatically, so every sheet you paste into starts with a complete, properly labeled table sized precisely to what you've configured.
This precision matters when a particular Excel workbook has specific constraints, formulas that recalculate more slowly with larger pastes, formatting applied per row, or simply a preference for a specific number of rows per sheet for organizational reasons.
Every row-count-based chunk is also saved to disk automatically as XLSX or another chosen format, giving you a permanent, precisely-sized backup of the Excel data alongside whatever you paste manually.
Everything runs locally on your PC, aside from a one-time license check. Loading, chunking, and exporting all happen offline, with your Excel data never uploaded anywhere. Data analysts and engineers moving large extracts between tools, database administrators handing off query results, finance and accounting teams transferring big ledgers, operations and reporting staff assembling data from many sources, and anyone who has ever tried to paste more rows into Excel than it was willing to accept, all use the same underlying workflow. Virtual rendering keeps the loaded-data view smooth even at the upper end of the app's capacity, and every worker thread runs its own SQLite connection in WAL mode, so nothing here depends on your PC having an unusual amount of memory to spare.
- Install Million by Million Rows Copier on your Windows PC.
- Paste your Excel data with Ctrl+V or load an XLSX or XLS file.
- Set your exact row count per copy for this workbook.
- Click Start Copying Out to lock the row count in for the session.
- Click Copy Next Chunk to copy exactly that many rows.
- Paste each chunk into a fresh Excel sheet.
- Repeat until the entire Excel dataset has been copied.
- Review the auto-saved XLSX chunks in your output folder.
- Use Re-copy Current Chunk if your clipboard gets overwritten mid-paste.
- Click Open Output Folder to review everything you've saved so far.
- Precise row count control tailored to your specific workbook
- Row count adjustable from 1 to 10,000,000
- Header row included automatically in every Excel chunk
- Auto-saves each chunk to disk as XLSX or other formats
- Useful for workbooks with specific formatting or formula constraints
- Handles Excel datasets up to 50,000,000 rows total
- Runs fully offline aside from a one-time license check
- One-time purchase for Windows, with Gumroad license activation
- Choose your own output folder, or use the default under My Documents
- Works with files on local drives, external drives, and network shares
Why would I want a different row count than the default million?
Certain Excel workbooks, especially those with heavy formatting or formulas, may perform better with smaller pastes, while simpler workbooks might comfortably accept more.
Can I set the row count specifically for one workbook and change it later?
Yes, row count is set before each session; you can use a different value for a different workbook in a subsequent session.
Does the header row still appear even with a custom row count?
Yes, the header row is included on the clipboard with every chunk regardless of the row count you've set.
Is XLSX available as an auto-save format for custom row-count chunks?
Yes, XLSX is one of six output formats available for auto-saving chunks, regardless of the row count you've chosen.
Does this work on both Windows 10 and Windows 11?
Yes, Million by Million Rows Copier is built and tested for both Windows 10 and Windows 11.
Is my data safe when using this tool?
Yes, all processing happens locally on your PC; no data is ever uploaded, so proprietary or sensitive records stay fully under your control.
Where do saved chunks and exports go by default?
A default output folder under My Documents is set automatically at startup, though you can choose a different folder before loading begins.
Can I use this on files stored on an external or network drive?
Yes, files on local drives, external drives, or mapped network shares all load the same as any local file.
What happens if the app is closed partway through a session?
Each chunk is saved to disk automatically the moment it's copied, so a closed app or crash never loses more than the chunk that was in progress.
Is there a trial version available before buying?
Check the product page on turbo-soft.com for current trial availability and details.
Ready to copy your Excel data by an exact row count, fully offline?