About this tool
The CSV Viewer opens CSV files in a spreadsheet-style grid in your browser. You can sort columns, filter rows, edit cells, and export the cleaned file — all without installing Excel or uploading the file to a remote service.
CSV Viewer & Editor
Upload or paste CSV data. Sort, filter, edit, and export.
How to use
- Drop a CSV file into the editor or paste the raw content.
- Inspect the detected delimiter, header row, and column types.
- Click a column header to sort, or type in the filter box to narrow rows.
- Edit cells directly in the grid when corrections are needed.
- Export the final table as CSV or copy it to your clipboard.
Common use cases
- Quickly inspecting a CSV export from an analytics tool.
- Cleaning up rows before importing into a database.
- Filtering a large list without loading it in Excel.
- Fixing encoding or delimiter issues by re-saving.
- Sharing a cleaned subset with a colleague.
Frequently asked questions
Will my CSV file be uploaded anywhere?
No. The file is read with the browser File API and never leaves your device.
Which delimiters are supported?
Comma, semicolon, tab, and pipe are auto-detected. You can override the detection manually.
How large a file can it open?
Files under ~20 MB load smoothly on most laptops. Very large files may be slow because browsers keep everything in memory.
Does it handle Korean or Japanese text correctly?
Yes. UTF-8 is the default. If your file uses another encoding, re-save it as UTF-8 first.