CSV viewer & editor — edit CSV in a grid
Paste a CSV and edit it in a spreadsheet-style grid — change cells, add or remove rows and columns — then copy clean CSV back out. It runs entirely in your browser (0 uploads, works offline).
How to use it
- Paste CSV, TSV or a Markdown table to load it into the grid.
- Click any cell to edit; use the buttons to add or remove rows and columns.
- Copy or Download the resulting CSV.
FAQ
How do I edit a CSV file online for free?
Paste it here and it loads into an editable grid. Edit cells directly, add or remove rows and columns, and the clean CSV output updates live — all on your device with no upload.
Is my spreadsheet data uploaded to a server?
No. Everything is parsed and edited in your browser and nothing is transmitted or stored, which you can verify by turning off your Wi-Fi. That is why it is safe for customer lists and financial data.
Does it handle quoted fields and commas inside cells?
Yes. Parsing follows RFC 4180, so quoted fields, embedded commas, escaped quotes and leading zeros are preserved on the way in and correctly re-quoted on the way out.
Can it read a tab-separated or Markdown table too?
Yes — paste TSV or a Markdown table and it detects the format automatically, loads it into the grid, and lets you export as CSV.
Limits
Designed for hand-editing small-to-medium tables; very large files (hundreds of thousands of rows) are better split first with the CSV splitter.
Related
The CSV cleaner trims and dedupes automatically; the Markdown table editor outputs aligned Markdown instead.
Bookmark this page (Ctrl+D, or ⌘D on Mac) or install the app — it works offline the next time you need it.