Auto Copy Paste Excel Data With Safe, Repeatable Chunks

Manually managing copy paste Excel data becomes unworkable once a dataset runs into the millions of rows, since every paste has to be tracked, sized correctly, and checked for errors by hand.

Million by Million Rows Copier automates the repetitive parts of that process. It loads your data, up to 50,000,000 rows, into a local SQLite file, then produces 1,000,000-row chunks on demand through Copy Next Chunk, with progress and chunk counts tracked automatically.

Every chunk is auto-saved to disk as it's generated, and the app keeps a running manifest of what's been copied, so there's no need to manually note which chunk was pasted where or double-check row counts by hand.

The result is a workflow where the heavy lifting, loading, chunking, saving, and tracking, happens automatically, leaving you with a simple repeat of Copy Next Chunk and paste until the job is done.

1. Load your dataset into Million by Million Rows Copier once, from file or clipboard.
2. Let the app automatically store the data locally and report the total row count.
3. Set your chunk size, or keep the automatic 1,000,000-row default.
4. Click Copy Next Chunk and paste into Excel; the app tracks progress automatically.
5. Check the automatically generated manifest once every chunk has been copied.

• Automatic chunking at 1,000,000 rows, sized for Excel every time
• Automatic progress tracking across every chunk copied
• Auto-saved chunk files with no manual file management required
• Automatic manifest and summary logs of the full session
• Loads more than 25 formats without manual conversion steps
• Background threads handle loading automatically, without freezing the app