How to Copy and Paste Large Data Sets in Excel

Data sets pulled from databases, analytics platforms, or exported reports frequently exceed the row count a single Excel worksheet can hold, which makes the usual copy and paste sequence unreliable for anything genuinely large.

Million by Million Rows Copier is built around this exact scenario. It loads large data sets, up to 50,000,000 rows, into a local SQLite file rather than into memory, so the size of the source file no longer determines whether the operation succeeds.

Once loaded, the data set is broken into 1,000,000-row chunks that can each be copied to the clipboard with a single click and pasted into a fresh worksheet, keeping the header row and structure identical across every chunk.

Because every chunk is verified and auto-saved as it's produced, you can pause the process, close the app, or come back later without worrying that part of the data set was lost along the way.

1. Load your large data set into Million by Million Rows Copier from file, or paste it directly.
2. Allow the import to finish; the app reports total rows once loading completes.
3. Confirm or adjust the chunk size before starting.
4. Use Copy Next Chunk to place the first block on the clipboard.
5. Paste into Excel, then repeat for each subsequent chunk on a new sheet.

• Handles data sets up to 50,000,000 rows in a single session
• Splits any data set into consistent 1,000,000-row chunks
• Preserves header rows and column order across every chunk
• Loads from more than 25 file formats, covering most export types
• Exports the full data set directly to CSV, XLSX, JSON, SQL, TSV or XML
• Local SQLite storage keeps large data sets stable during long sessions