Free CSV Validator

Confirm your CSV parses cleanly — quote balance, structure and row count in one glance.

Word Counter

Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste CSV to check

    Exports, feeds or hand-edited data before you import it.

  2. 2

    Read the verdict

    Valid CSV reports its row count; quote problems show inline.

  3. 3

    Fix and re-run

    Edit the input and the check updates live.

Key features

InputVerdict
a,b,c 1,2,3Valid — 2 rows
"unclosed fieldInvalid — unterminated quote
Empty pasteValid — 0 rows
Quoted newlinesHandled correctly, counted as one row

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service.

  • No uploads, no accounts, no sign-up
  • No cookies or tracking of your text
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — the only requests you will ever see are this page's own static files (HTML, CSS, JavaScript). Nothing you type is ever transmitted.

Frequently asked questions

What does validation check?
Quote balance and general parseability, exactly as an importer would read the file.
Does it enforce column counts?
No — ragged rows are legal in CSV; the validator reports structural soundness, not schema.
Are quoted newlines supported?
Yes — a newline inside quotes belongs to the field and doesn't split the row.
Private?
Fully — validation runs locally in your tab.

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