CSV to XLSX
Create an Excel-compatible file for Microsoft Excel or Google Sheets.
Private spreadsheet conversion
View and inspect CSV files privately
Open CSV data in a responsive table, search and filter columns, validate rows, and copy values—all locally in your browser.
Upload a spreadsheet
Drag and drop a CSV, XLSX, or XLS file. All processing happens locally in your browser with SheetJS.
No upload. No account. Your file stays on this device.
XLSX to CSV
Export spreadsheet data as CSV for use in other systems.
Clean and rename
Remove empty rows and rename columns before export.
Batch conversionConvert several CSV or spreadsheet files locally. A failed file does not stop the rest of the queue.
Batch conversion
Convert several CSV or spreadsheet files locally. A failed file does not stop the rest of the queue.
Up to 20 files and 250 MB total per queue. Two files are processed at a time to limit memory use.
Drop CSV, XLSX, or XLS files here
No files are queued. Source files are never included in ZIP downloads.
Inspect CSV before you use it
Delimora provides row numbers, column filters, sorting, validation summaries, and virtualized rendering for a practical browser-based CSV review workflow.
How to use this tool
- 1Choose a CSV file.
- 2Confirm its delimiter and header row.
- 3Search, sort, filter, validate, or copy the data.
Frequently asked questions
Is this CSV viewer private?
Yes. File contents are processed locally and are not sent to analytics or a server.
Can I view large CSV files?
The preview uses virtualized rows, but browser memory still imposes practical file-size limits.
Can I edit and export the CSV?
Yes. You can edit cells, clean data, undo changes, and export when needed.