Is my CSV uploaded to Convertr?

No. The CSV formatter runs entirely in your browser. Your pasted data and local files are not uploaded to Convertr servers.

What CSV errors does this validator detect?

It detects unclosed quoted fields and rows with a different number of columns than the header or first data row.

Which delimiters are supported?

The tool supports commas, semicolons, tabs and pipes. Auto-detect chooses the delimiter that creates the most consistent rows.

Can I use this as a CSV viewer?

Yes. Parsed rows are shown in a table preview so you can inspect columns before copying or downloading the cleaned output.

CSV Formatter & Validator

Validate CSV rows, detect delimiter problems, format delimited data and preview columns locally in your browser.

Input CSV

0 characters

Formatted output

Result appears here. Everything runs in your browser.

Ready

Table preview

No rows parsed yet

CSV options

Input delimiter Output delimiter Trim unquoted fields Remove extra spaces around unquoted values before output. First row is header Use the first row as column names in the table preview.

The validator checks RFC-style quoted fields and consistent row lengths. Large files depend on browser memory.

Spreadsheet export checks

Find rows with missing or extra columns before importing customer lists, reports or analytics exports.

Delimited text cleanup

Normalize comma, semicolon, tab and pipe separated text into clean CSV or TSV output.

Private local processing

CSV parsing and formatting happen in JavaScript on your device. No upload endpoint is involved.

Related developer tools

JSON Formatter

Format, validate and minify JSON

YAML Formatter

Validate YAML configuration files

XML Formatter

Format and validate XML

Developer Tools

More browser-native utilities