CSV Validator

Check whether a CSV file is really valid: unclosed quotes, rows with the wrong number of columns, duplicate headers. Runs in your browser.

CSV to check

Everything runs in your browser — the file is never uploaded. Parsing follows RFC 4180, so a line break inside quotes stays inside the cell.

Paste a CSV on the left (or open a file) and press Check.

How it works

  1. 1.Import an Excel, CSV, TSV or JSON file, or paste the table. It is parsed on your own device.
  2. 2.Pick the columns to show: one category axis and up to three values.
  3. 3.Generate once, then keep tweaking — chart type, aggregation, sorting and theme update instantly.
  4. 4.Download an image, or publish the result as an encrypted link that expires on its own.

Frequently asked questions

Do I get free credits to try CSV Validator?
Yes — new accounts get 3 free credits to spend on any tool, CSV Validator included. After that you only pay for what you run.
How many credits does CSV Validator 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?
CSV Validator 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. CSV Validator works in any modern browser — nothing to download or install.