Is my CSV text uploaded to a server?
No. The tool parses, transforms, previews, and exports data locally in your browser without uploading your input.
Data & Tables
CSV Validator
Validate CSV files online. Find delimiter issues, inconsistent column counts, quote errors, encoding problems, and malformed rows in your browser.
Tool
CSV Validator
Validate CSV files online. Find delimiter issues, inconsistent column counts, quote errors, encoding problems, and malformed rows in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this CSV Validator to diagnose structural CSV problems before importing or converting a file. The tool checks delimiter choices, header consistency, uneven row lengths, broken quotes, unexpected line breaks, UTF-8 text, optional BOM markers, and empty rows. It focuses on explaining what is wrong and where the issue appears, so users can repair the table with confidence.
Examples
- name,email,score Ada,ada [at] example.com,98 Ben,"ben [at] example.com,87 Cy,cy [at] example.com,91,extra
Frequently Asked Questions
Which CSV details are supported?
The parser handles configurable delimiters, quote characters, UTF-8 text, optional BOM detection, mixed line endings, headers, and line breaks inside quoted fields.
What happens when rows have different numbers of columns?
The tool reports the mismatch clearly. Depending on the mode, missing cells can be kept empty and extra cells can be shown for review instead of being silently discarded.
Can the validator fix the file automatically?
It should explain detected issues and may offer targeted repair suggestions, but it should not make ambiguous changes without user confirmation.
Does it validate business rules?
No. This validator is focused on CSV structure, parsing, and table shape rather than domain-specific rules such as required product IDs or price ranges.