TSV Validator
Drop any .tsv file to instantly check its structure. Validates tab-delimiter consistency, column count across every row, duplicate or empty headers, encoding issues (BOM, null bytes), empty rows, line endings, and previews the first few rows. Nothing leaves your browser.
TSV File
Drop a .tsv file here, or
Supports .tsv files up to 50 MB — or drag anywhere on the page
⛔
Wrong file type — only .tsv files are supported. You dropped a file.
Validation Errors
Warnings
✓ Valid TSV
Column Headers
Data Preview (first 5 rows)
How It Works
1
Drop your TSV fileDrag it anywhere onto the card, or click "browse" to pick it from your device. Only
.tsv files are accepted.2
Structure analysisThe validator confirms the tab delimiter, scans every row for column count consistency, checks for duplicate or empty headers, and detects encoding issues like a BOM marker or null bytes.
3
Review the reportGet a pass/fail result plus full stats: row count, column count, empty cells, empty rows, line ending style, BOM status, and a live data preview of the first 5 rows.
What Gets Validated
- Tab delimiter enforcement — confirms the file uses
\tas its separator and warns if a different delimiter scores higher, which may indicate a misnamed file. - Column consistency — every data row is compared against the header column count. Rows with too many or too few tab-separated fields are flagged with their line number.
- Duplicate headers — checks the first row for repeated column names, which break most data pipelines.
- Empty header names — flags columns in the header row with no name.
- Empty rows — counts and flags completely blank rows, which can cause off-by-one errors in downstream processing.
- Encoding issues — detects a UTF-8 BOM (byte order mark) and null bytes that indicate binary content or wrong encoding.
- File statistics — reports total rows, column count, empty cells, file size, and line ending style (CRLF vs LF).
- Data preview — renders the first 5 data rows in a formatted table so you can visually confirm the parse is correct.
🔒 Privacy & Security
All validation is performed locally using the Web File API and the FileReader API. Your TSV data is never sent to a server. Suitable for sensitive business data, customer records, or any private tabular content.