Free CSV Validator — Instant Format & Error Check
Check format, headers, encoding and more for a single CSV
Select CSV
Select CSV
Drag & drop or click
How to Use
Detail guide
Step 1
Upload file
Drag and drop a CSV onto the «Select CSV» area or click to choose a file. Analysis of format, headers, and encoding starts immediately.
Row limits depend on your plan and are shown in the footer under «Current plan».
The tool checks row count, column count, encoding, delimiter, BOM, line endings, and more. Invisible characters, column mismatch, and duplicate headers are reported.
If the delimiter differs from auto-detection, use «Delimiter» to choose comma, tab, semicolon, or pipe.
Click «Single-file check» to go to the detailed check page, fix issues, and download the corrected CSV.
To compare two CSVs, use «Compare two files» to open the comparison flow.