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CleanCSV

CSV tool

View a CSV without a spreadsheet

Read the file as a grid, including quoted commas and line breaks, before Excel has a chance to guess types. Search and filter stay in this tab.

Drop a CSV here

Comma, semicolon, tab, or pipe. Quotes, commas, and line breaks inside a cell stay intact. The file is read here and is not saved on the server.

Up to 32 MB. Files over 8.0 MB ask before parsing.

What you can inspect

The grid keeps long values on one line and opens the full text when you select a cell. HTML in a cell is shown as characters, not rendered. Use the search box to filter rows, or show only blank cells and duplicate rows. Sorting is available in the clean panel and does not rewrite values.

Files stay in the tab. There is no account and no upload step. Very large files are parsed off the main thread when they pass the size that would otherwise freeze the page, and files over 32 MB are refused with an explanation rather than a partial grid. Pair this view with the CSV validator when you need the issue list, not just the rows.

Questions about this tool

Related

  • CSV validator — Check a CSV for parse errors, ragged rows, blank headers, duplicate headers, encoding issues, and formula-like cells.
  • CSV to TSV — Convert a comma- or semicolon-separated file to tab-separated values without dropping quotes, zeros, or line breaks inside cells.
  • Why Excel changes CSV values — Why Excel drops leading zeros, rewrites dates, and shortens long IDs when it opens a CSV, and how to check the text first.