CSV to Excel
Convert a CSV file to Excel (.xlsx) in your browser. Download a real spreadsheet — nothing is uploaded.
CSV viewer
Open and browse a CSV in a paginated table in your browser. No upload — view large files locally.
Drop a CSV file here or click to choose
Browse locally — nothing is uploaded
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How to use CSV viewer
Open and browse a CSV in a table. Page through large files without uploading them.
Everything runs locally in your browser — your files are never uploaded to a server.
CSV viewer FAQs
How do I open a large CSV online without Excel?
Drop a CSV file to browse it in a paginated table. Viewing runs in your browser with no upload.
Is the CSV viewer 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.
Can I view CSV files on a Chromebook or phone?
Yes, in a modern browser. Very large files may be slower on low-memory devices.
More Excel/CSV
Excel to CSV
Convert Excel .xlsx or .xls to CSV in your browser. Choose a sheet and delimiter, then download.
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.
CSV to SQL
Generate SQL INSERT statements from a CSV file in your browser. Set a table name and download .sql.