QR Code Batch Generation and Label Creation Tool

Overview #Personal Development

A web tool that reads business data from CSV/XLSX files and batch designs, previews, and outputs QR-labeled A4 PDFs. All processing from data analysis to PDF generation is completed within the browser with a Local-first design—business data is never sent to a server.

Main Features

Data Import

• Supports CSV (UTF-8 / Shift_JIS), XLSX, and manual input
• Auto-detects delimiters, recognizes header rows
• Handles up to 5,000 records and 10 MB

Field Mapping

• Assign file columns to QR content, display name, management number, and supplementary text
• Auto-suggests initial candidates from common column names

Validation

• Checks for blank and duplicate QR content
• URL format validation, character count warnings
• Error rows are automatically excluded

Label Designer

• Free placement of QR codes and text via drag-and-resize
• 0.5 mm grid, numeric input, keyboard operation support
• Multiple presets from compact (50×30mm) to card size (86×54mm)

Export

• A4 PDF generation and browser printing
• Batch download all QRs as PNG/SVG in ZIP format
• Multi-page support, progress display

Template Feature

• Built-in templates for equipment management, product labels, event check-in, etc.
• Save and reuse editing settings in browser

Intended Use Cases

Equipment/asset management, product labels, event check-in, shelf numbering, URL distribution, inventory management, membership cards, etc.

Technology

Next.js 16 / React 19 / TypeScript. Uses SheetJS, QR code generation, jsPDF, and JSZip.