Excel and data work
CSV / Excel Viewer
View spreadsheets without Excel
🔒 All data is processed in your browser. Nothing is uploaded to any server.
📊
Upload file (CSV / TSV / XLSX)
ℹ️ All processing in your browser.
Quick guide
What can CSV / Excel Online Preview help you do?
Free CSV / TSV / Excel viewer in your browser. Search rows and export the opened sheet as CSV. Files never leave your browser.
Best for
CSV / Excel Online Preview helps with quick debugging, API data cleanup, format checks, and small code or config tasks without opening an IDE or installing a package.
How to use it
For CSV / Excel Online Preview, paste the text, code, or configuration into the input area, choose the mode you need, and run it. For large data, test a small sample first.
How to read the result
After using CSV / Excel Online Preview, the output is kept copy-friendly for docs, code, and config files. When validation is available, fix the reported error location before trusting the final output.
Privacy and limits
When using CSV / Excel Online Preview, most processing happens in the browser. Do not paste passwords, private keys, tokens, or unmasked production data into any online tool.
For CSV / Excel Online Preview: Developer tools are for quick inspection and conversion. They do not replace tests, linting, security review, or version control.
Frequently Asked Questions
Can I edit?
Preview only. Download as CSV to edit in Excel/Google Sheets.
How large a file?
CSV up to 10MB, Excel up to 5MB recommended.
Is my file uploaded?
No. SheetJS parses in your browser.