How It Works Under the Hood
SKU lines are validated against symbology rules (including EAN-13 and UPC check digits), rendered at crisp high-DPI onto offscreen Canvas with full Unicode/Vietnamese typography, and positioned onto exact PDF coordinates with pdf-lib.
Step-by-Step Instructions
Paste SKUs formatted as CODE | Title | Price | xQty (one item per line).
Select your symbology (Code 128, EAN-13, UPC-A, Code 39, or QR Code).
Pick a thermal roll (4×6", 50×30mm, 2×1") or A4 sticker grid and download your PDF.
Key Features & Performance
- EAN-13 & UPC Check-Digit Guard: Catches invalid product barcodes before printing labels
- Thermal & A4 Sheet Presets: Built-in layouts for 4×6 in, 50×30mm, 2×1 in, 24-up & 40-up A4
- Quantity Multipliers: Append | x5 to repeat any SKU label automatically
- Unicode Title Support: Prints Vietnamese, CJK, and currency symbols crisply
Local Browser Processing & Privacy
Traditional web converters upload your documents, snippets, or media files to remote servers. Bulk Barcode & Thermal Label PDF Generator runs inside your browser tab:
Your input text and files are processed locally without uploading payloads to a processing server.
Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).
Working outputs stay in your browser tab and are released when you reset the tool or close the tab.
Frequently Asked Questions
Which barcode format should e-commerce sellers pick?
Use Code 128 for internal warehouse SKUs and flexible alphanumeric codes, EAN-13/UPC for official retail GTIN barcodes, and QR when linking packaging to URLs.
Do thermal printers require special PDF margins?
Select the matching roll dimension (e.g. 50×30mm or 4×6 in) and choose Actual Size / 100% scale in your print dialog for crisp alignment.
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