A huge data file exposes the weakness in most copy-paste workflows almost immediately: loading it locks up the application, and attempting to paste it somewhere else locks things up all over again, sometimes badly enough to require a forced restart.
Million by Million Rows Copier copies huge data files without freezing at either step. It stores your data in a local SQLite file instead of holding it all in memory, and runs every slow task on a background thread, which is what lets you copy large data and paste it one by one, chunk by chunk, without the window freezing at any point.
Loading a huge file, whether by pasting with Ctrl+V or by loading it in any of 33 supported formats, happens with a visible progress bar rather than an unresponsive window, so you always know the app is working rather than wondering if it's crashed.
Once loaded, Copy Next Chunk builds and copies each piece, by default 1,000,000 rows, with the header row included automatically, keeping every paste operation small enough that the destination application doesn't freeze either.
Each chunk is also saved to disk automatically in your chosen formats the moment it's copied, so a crash in the destination application, or anywhere else, never loses more than the chunk currently in progress.
Everything runs locally on your PC, aside from a one-time license check. Loading, chunking, and exporting all happen offline, with your huge data file 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 huge data file with Ctrl+V or load it directly.
- Watch the progress bar as the file loads without freezing.
- Click Start Copying Out to lock the dataset in place.
- Click Copy Next Chunk to build and copy the first piece.
- Paste that chunk into your destination.
- Repeat with Copy Next Chunk until the file is fully copied.
- 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.
- Stores data in a local SQLite file instead of memory
- Every slow task runs on a background thread
- Visible progress bar during large file loads
- Chunk-based copying avoids overwhelming destination apps
- Each chunk saved to disk as it's copied, limiting crash loss
- Handles files up to 50,000,000 rows in one session
- 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 do huge data files cause other applications to freeze?
Most applications try to load an entire file into memory and process it in one operation, which can lock up the interface once the file gets large enough.
How does this app avoid freezing while loading a huge file?
Data is stored in a local SQLite file rather than memory, and all slow tasks run on background threads, keeping the window responsive throughout.
What happens if something crashes while I'm working through chunks?
Each chunk is saved to disk automatically the moment it's copied, so a crash never loses more than whatever chunk was in progress at the time.
Is there a way to see loading progress for a huge file?
Yes, a progress bar shows the file loading rather than leaving you with an unresponsive window and no indication of what's happening.
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 huge data files without freezing, fully offline?