Label Printer for WebUSB

Capture shipping labels and print them straight to your TSPL label printer over WebUSB — fast, local, no detour.

Print your shipping labels straight to a TSPL label printer (e.g. OCBP-401DT and other TSC-compatible models) — directly over WebUSB, with no slow detour and without the label first landing in your downloads folder. The extension captures the label PDF as soon as you print from your shipping tool, shows every label in a clear window with a checkbox per label, and sends the selected labels to the printer as a crisp 1-bit bitmap image. You stay in control: adjust rotation, black/white threshold and selection each time. HY THIS EXTENSION • Fast — labels go straight to the printer; no detour through the downloads folder or a slow print dialog. • Local & private — all processing happens in your browser; no label data is sent to external servers or to the developer. • Per-label control — tick which labels do or don't get printed; preview how each label will come out. • Configurable — label size, gap, density, speed, rotation, threshold, dithering and inverting. FEATURES • Capture labels and show them in a single window, with preview and selection checkboxes. • Print directly over WebUSB (TSPL bitmap). • Settings menu for printer and label options. • On ChromeOS: also pick the printer in the normal print dialog (Ctrl+P). REQUIREMENTS • Google Chrome, Microsoft Edge or another Chromium-based browser with WebUSB (works on Windows, macOS, Linux and ChromeOS). • A TSPL/TSC-compatible USB label printer. HOW IT WORKS 1. Connect your label printer over USB. 2. Print your shipping label as usual; the label window opens automatically. 3. Click "Connect printer" once and choose your printer. 4. Tick the labels you want and click "Print selected labels". COMPATIBILITY Designed to work with shipping-label PDFs such as those produced by MyParcel / PostNL from within the Shopify admin. It should also work with other tools that produce a label PDF. DISCLAIMER This extension is provided "as is", without any warranty of any kind. Use is entirely at your own risk; the developer accepts no liability whatsoever for its operation, for misprints, mis-shipped parcels, loss of material/time, or any damage of any kind. Always check printed labels yourself before shipping. NOT AFFILIATED This extension is an independent tool and is in no way affiliated with, made by, or endorsed by MyParcel, PostNL or Shopify. Those names are used only to describe compatibility and are the property of their respective owners. PRIVACY The extension collects no personal data and sends no label data to the developer or to third parties. See the privacy policy for details.