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CSV Viewer

Open a CSV in your browser and see it as a table with column statistics — count, missing values, min, max, mean and distinct values.

Open a CSV

Choose a file, or paste CSV from the clipboard.

Column statistics

Statistics for every column appear here.

A column counts as numeric only when every non-empty value parses as a number. Missing means an empty or whitespace-only cell.

Your file is never sent to a server. It is read and processed by your own browser, and the results are not stored.

How to use it

  1. Paste CSV, or choose a .csv file.
  2. Check the table preview for misaligned columns or empty values.
  3. Read the per-column statistics; copy the preview as TSV if you need it elsewhere.

Limits worth knowing

  • Files above 25 MB and more than 200,000 rows are refused.
  • The table shows the first 50 rows and 12 columns; statistics cover every parsed row.
  • Numeric statistics exclude non-numeric cells, so min, max and mean can be blank.
  • There is no editing; this is a viewer. Convert with the CSV converters for output.

Why column statistics first

Most CSV problems show up as shapes rather than bytes: a column that is half-empty, an amount field where every value is text, or a count that does not match the row you expect. The statistics row answers those questions without loading a spreadsheet.

The TSV copy keeps the preview copyable into anything that understands tab-separated values, which is most tooling.

Reading a ragged file

A row with too few cells shows empty cells; a row with too many extends the column list. The missing-values column in the statistics makes either case visible immediately.

Frequently asked questions

Does CSV Viewer upload my files to any server?

No. CSV Viewer runs in your browser, and the file is read there rather than sent to a server for processing. Our host still sees ordinary page-request metadata, which is described on the privacy page.

Is CSV Viewer free to use?

Yes, CSV Viewer is free, with no paid tier, no account, and no watermark added to your output. The limits are technical rather than commercial: file size, page count and supported formats are listed on this page.

What file formats and sizes are supported?

CSV Viewer supports .csv, .txt, .tsv files up to 25MB directly in your browser.

Can it open really large files?

The file is read into memory, so the practical ceiling is your device. Files above 25 MB or 200,000 rows are refused, and the table shows the first 50 rows so the tab stays responsive.

Which separator is used?

The delimiter is detected: comma, semicolon or tab. Quoted fields, doubled quotes and embedded line breaks inside quotes are supported.

How are the statistics computed?

Per column: non-empty count, numeric count, missing count, min, max, mean and distinct values. A column is numeric only if every non-empty value parses as a number — otherwise min, max and mean are blank.

Can I copy the table out?

The preview can be copied as TSV, which pastes into spreadsheets and databases with columns intact. The original file is never modified.