.xlsx Validation
Spreadsheet validation that checks for actual data
A spreadsheet with column headers but zero data rows looks valid to every file upload system — except Uplint. We read the structure to confirm your users are uploading real data.
Common Excel / XLSX Upload Issues
Spreadsheets with column headers but zero data rows
Template files uploaded instead of completed forms
Corrupt .xlsx files that fail to parse downstream
Macro-enabled files (.xlsm) disguised as .xlsx
Oversized spreadsheets that break processing pipelines
What Uplint Validates
MIME type verification for Office Open XML format
Sheet count and row count analysis
Header-only detection (columns defined but no data)
Structural integrity of the OOXML archive
Malware and macro scanning
File size enforcement per context
Quick Start
validate-xlsx.ts
const result = await uplint.validate(file, {
context: "data-imports",
scan: true,
detectBlanks: true
});Start validating Excel / XLSX files today
Try the free CLI first: pip install uplint