CSV to Excel
Convert a CSV file to Excel (.xlsx) in your browser. Download a real spreadsheet — nothing is uploaded.
CSV analyzer
Inspect a CSV for row and column counts, inferred types, and file size — entirely in your browser.
Drop a CSV file here or click to choose
Analyzed locally — nothing is uploaded
How to use CSV analyzer
Inspect a CSV for row/column counts, inferred types, and size.
Everything runs locally in your browser — your files are never uploaded to a server.
CSV analyzer FAQs
How do I analyze a CSV file online?
Drop a CSV to see row and column counts, inferred column types, and file size — all calculated in your browser.
Is the CSV analyzer free?
Yes. Every Excel and CSV tool on ReallyUseful.Tools is free to use, with no account or subscription required.
Are my files uploaded?
No. Files are processed in your browser on this device. Nothing is uploaded to our servers.
What does inferred type mean?
Each column is labeled number, date, text, or empty based on the values it contains. It is a quick inspection aid, not a full data-quality audit.
More Excel/CSV
Excel to CSV
Convert Excel .xlsx or .xls to CSV in your browser. Choose a sheet and delimiter, then download.
CSV viewer
Open and browse a CSV in a paginated table in your browser. No upload — view large files locally.
Merge CSV files
Combine multiple CSV files into one in your browser. Rows are stacked and headers aligned by name.
CSV to XML
Convert CSV rows into structured XML in your browser. Each row becomes an element — nothing is uploaded.