CSV and spreadsheet row limits, compared
Excel: 1,048,576 rows per sheet. Google Sheets: 10 million cells per spreadsheet, shared across all sheets in the file. openbigcsv.com: about 300,000 rows in-browser, free, no account. Row Zero: 10s of millions of rows on the free plan, 1 billion+ on Enterprise.
| Tool | Row / size limit | Cost to reach it |
|---|---|---|
| Microsoft Excel | 1,048,576 rows and 16,384 columns per worksheet. Performance degrades well before the ceiling. | Included with Microsoft 365 |
| Google Sheets | 10 million cells total per spreadsheet file, shared across every sheet/tab in it. | Free with a Google account |
| openbigcsv.com | ~300,000 rows per file, browser-dependent. Read-and-export only, not a full spreadsheet. | Free, no account |
| Row Zero (Free plan) | 10s of millions of rows, 5GB per workbook, 1 workbook. | Free |
| Row Zero (Pro / Business) | Same data scale as Free, with unlimited workbooks and, on Business, automated warehouse refresh. | $12–$20/user/month — see pricing |
| Row Zero (Enterprise) | 1 billion+ rows, custom data plane and connector options. | Custom — schedule a demo |
Limits reflect each vendor's publicly documented specifications as of 2026 and are subject to change; verify current limits directly with each vendor.
How to read this table
Row and cell limits describe a ceiling, not a comfortable working size. Excel and Google Sheets both slow down well before their stated maximum, especially with formulas, conditional formatting, or many text columns. A "limit" is the point where the tool stops working at all; a much lower row count is often where it stops being pleasant to use.
If you just need to look at a file once — search it, sort it, pull out a subset — a purpose-built viewer avoids the slowdown entirely, because it isn't running spreadsheet formulas over the data. That's the gap openbigcsv.com fills. If the file is one input to a recurring analysis, a spreadsheet designed for scale, like Row Zero, is the better fit.
Related: CSV too big for Excel and how to open a large CSV file online.