Big CSV Viewer

Open a big CSV or TSV in your browser, scroll through hundreds of thousands of rows, search, fix a few cells and export the result.

Open a big table

The file is never uploaded, and only the rows on screen are rendered — that is why a few hundred thousand rows still scroll smoothly.

How it works

  1. 1.Paste CSV / TSV text, or open a file — a few hundred thousand rows still open without freezing the page.
  2. 2.Switch the delimiter if it is not a comma (tab, semicolon or pipe), then click Open the table — parsing runs in chunks and shows progress.
  3. 3.Search across all columns, and double-click a cell to edit it — Enter saves, Escape cancels.
  4. 4.Export the table as CSV or Excel; the export includes the cells you changed.

Frequently asked questions

Do I get free credits to try Big CSV Viewer?
Yes — new accounts get 3 free credits to spend on any tool, Big CSV Viewer included. After that you only pay for what you run.
How many credits does Big CSV Viewer cost?
Everything runs in your browser and nothing is uploaded: free accounts pay 1 credit per run, and Pro or Pro+ members run it as often as they like.
Is the content I paste private?
Big CSV Viewer uses your input only to generate the result. Stored results are deleted automatically by our retention policy, and you can remove any run from your history.
Do I need to install anything?
No. Big CSV Viewer works in any modern browser — nothing to download or install.