Transferring a large dataset between tools that only exchange data through copy and paste requires breaking that dataset into pieces small enough for both the source and destination to handle comfortably, without losing structure or requiring a script.
Million by Million Rows Copier transfers large datasets in million-row chunks by default, moving data between SQL, CSV, XLSX, and Excel in safe, evenly sized pieces, without lag, freezing, or crashing. Load your data once, by pasting with Ctrl+V or loading a file, and the app is ready to transfer it wherever it needs to go.
Copy Next Chunk builds each piece for clipboard-based transfer, with the header row included automatically, ready to paste into your destination application, while Export Everything As handles a complete, one-time transfer to disk if you don't need the manual paste step.
The transfer process is backed by a local SQLite database, so it stays reliable regardless of how large the dataset is, up to 50,000,000 rows in a single session, with chunk size adjustable from 1 to 10,000,000 to match the specific tools involved.
Because loading, chunking, and exporting all happen on background threads, the transfer tool stays responsive throughout, even while moving a genuinely massive dataset between two very different destinations.
Everything runs locally on your PC, aside from a one-time license check. Loading, chunking, and exporting all happen offline, with your data never uploaded anywhere during the transfer. 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 data with Ctrl+V or load a file.
- Click Start Copying Out to lock the dataset in place.
- Click Copy Next Chunk to build the first transfer chunk.
- Paste that chunk into your destination.
- Click Copy Next Chunk for the next piece.
- Repeat until the entire dataset has been transferred.
- Review the auto-saved 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.
- Transfers datasets between SQL, CSV, XLSX, and Excel
- Moves data in safe, evenly sized million-row chunks
- Header row included automatically in every chunk
- SQLite-backed reliability for datasets up to 50,000,000 rows
- Background threads keep the transfer process responsive
- Chunk size adjustable to match specific source and destination tools
- 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
Which tools can this transfer data between?
It moves data between SQL, CSV, XLSX, and Excel, and loads 33 input formats overall, so many combinations of source and destination are supported.
Does transferring in chunks avoid the lag or freezing a direct paste would cause?
Yes, moving data in safe, evenly sized chunks specifically avoids the lag, freezing, or crashing that a single massive transfer attempt would cause.
How large a dataset can be transferred in one session?
Up to 50,000,000 rows.
Is there a way to transfer without manually pasting each chunk?
Yes, Export Everything As writes the full dataset to disk in one go if you don't need the manual clipboard-based transfer for every piece.
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 transfer your large datasets in chunks, fully offline?