Validate pasted or uploaded CSV data with custom delimiters, header handling and an optional expected column count. It runs inside your browser.
Runs in your browser — your input is processed on this device and never uploaded.
Paste CSV text or upload a CSV file to check its structure. The validator detects common text encodings, parses quoted fields, and checks that records use a consistent number of columns.
The result reports whether the CSV is valid, its row and column counts when available, the number of structural errors, and the first failing source line and logical record. Those positions can differ when a quoted field spans multiple lines.
This tool validates CSV syntax and record width. It does not enforce column data types, required business fields, or application-specific rules.
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Drag a file here, or click to upload.
Max size 60 MB
Upload is optional.