CSV validator

Scan for the problems that break imports: unclosed quotes, rows with the wrong column count, and messy headings.

Drop a CSV file hereor click to choose one. Max 15 MB.Paste CSV

Delimiter

Other tools

CSV to JSON
Turn a CSV file into formatted JSON objects. Runs in your browser.
CSV to Markdown
Convert selected rows into a Markdown table you can paste into docs.
CSV to SQL
Generate SQL INSERT statements from a CSV file, without uploading it.
CSV diff
Compare two CSV files side by side and highlight added, removed, and changed cells.

Nothing is uploaded. About 15 MB per file.Privacy

In the Mac app, Check Data Quality finds problems and lets you jump from one to the next, even on files far past 15 MB.

What does it flag?

Unbalanced quotes, ragged column counts, blank headings, and duplicate headings.

Is the CSV uploaded?

No. The scan runs in this tab.

CSVUtility can jump between broken rows and keep working on files that are too large for a browser.