Crop, rotate, and format Amazon shipping labels for standard 4x6 thermal printers

Adjustments

Lock 4x6 Aspect Ratio Enforce standard 4x6 thermal label shape during crop
Auto-Detect Rotation Automatically rotate wide labels on load
Quick Rotation Controls
Zoom Workspace Controls

Paste Your Label

Press Ctrl+V anywhere on this page

or
Drop PDF here or browse

Multi-page PDFs supported — label page auto-detected

Label Editor Workspace

Paste a screenshot with Ctrl+V or drop a PDF to start editing

Help & Frequently Asked Questions

How do I print a letter-sized Amazon shipping label on a 4x6 thermal printer?

Amazon FBA shipping labels and customer return labels are often packaged in letter-sized PDFs or landscape documents. To format them for a standard 4x6 thermal label printer (such as Munbyn or Rollo), drop the PDF file here. Label4x6 instantly detects the barcode block, extracts the active label, and applies print-safe borders.

Is it safe to upload my shipping labels to this tool?

Yes, 100% safe. Unlike other online conversion tools that upload your files to external cloud servers, Label4x6 runs entirely client-side. The PDF rendering, cropping, and rotation occur strictly in your local browser window. No file data, tracking codes, or personal addresses are ever sent over the network.

Why was the border of my shipping label getting cut off?

Thermal printers require a small physical non-printable margin on the edges of the roll. If your label crop is too tight, the printer will clip the border or the barcode edges. Label4x6 automatically adds a clean 40px/60px print-safe padding around your cropped label to guarantee perfect print margins every time.

Does this tool support multi-page PDFs?

Yes. If you upload a PDF with multiple pages (for example, containing a packing slip and a shipping label), our smart dual-axis barcode scanning algorithm scans all pages in milliseconds, identifies the page containing the actual barcode, and opens it directly in the editor.