Make sense of your CSV.

Find broken rows. Preview your repairs. Keep every value on your device.

Your CSV, inspected

Source: your CSV, parsed locally with Papa Parse ·

Records, including header
Widest record
Delimiter used
Record separators

Record numbers include the first record. Empty cells show “empty”; missing fields show “missing”. Field and quoting rules.

What needs a look

Record	Issue	What it means

Choose what to change

Your original stays intact. Review the preview before downloading.

Add missing empty fieldsMake every record as wide as the widest. Keep all existing values.Remove empty recordsRemove records whose fields are all empty. Whitespace counts as content.Trim surrounding whitespaceRemove spaces and line breaks at the start and end of each cell.Prefix formula-like text with an apostropheChanges values that a spreadsheet may evaluate, including negative numbers.

Formula-like text is never evaluated here. Prefixing reduces risk but does not guarantee spreadsheet safety. OWASP CSV injection guidance.

CSV export delimiter

Review your export

Record / column	Before	After

CSV uses quoted fields, escaped quotes, UTF-8, and CRLF record separators. JSON uses row arrays, including the first record. Every cell stays a string.

View output

I reviewed this preview and want to export these values.

To preserve leading zeros in spreadsheet software, import columns as text. CSV cannot set spreadsheet column types.

Price$0

The core tool stays free. There is no premium plan.

Friction0

Accounts, cards, onboarding tours, or upgrade nags.

PrivacyPrivate

A check never becomes a public listing.

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Your data stays yours.

Does my CSV leave this browser?

No. Files and pasted text are processed locally and never sent to the server or analytics, placed in a URL, or saved as history. Refreshing or clearing removes your workspace. Cookieless DataFast measures page traffic.

What does free mean here?

No account, card, premium plan, or upgrade nag. The core tool stays free.

What does the inspection check?

Papa Parse reads the records. IndieCSV flags uneven rows, broken quoting, empty records, repeated headers, and formula-like text. Delimiter detection is a guess you can override. It cannot know the meaning of your data or the requirements of your next import.

Why does JSON contain arrays instead of objects?

Arrays preserve duplicate column names, uneven records, and the first record exactly as values. Nothing becomes a number, date, boolean, or object key automatically.

Which files can I open?

One UTF-8 CSV, TSV, or text file, up to 2 MiB, 20,000 records, 250 columns, and 200,000 cells. Comma, semicolon, tab, and pipe delimiters are supported. The table shows 50 records at a time. This is not an Excel workbook editor.