Is 4×6 inches exactly the same as 100×150 mm?

No, but they are very close. 4×6 inches equals 101.6×152.4 mm. If your roll stock is 100×150 mm, setting a 2mm margin in our tool ensures the printed content fits comfortably inside the printable width without edge clipping.

Does this tool replace my printer driver?

No. LabelMaster generates an industry-standard PDF formatted to exact physical points. Your operating system, PDF reader, and printer driver communicate directly with your physical thermal printer hardware.

Why does my printer print fuzzy or faint barcodes?

Faint barcodes are usually caused by low thermal print darkness (density) or high print speed. Increase darkness to 10-12 in your printer driver settings and reduce print speed to 3-4 IPS (inches per second). Also ensure your thermal print head is clean.

Can I convert multi-page batches of labels?

Yes. Upload a multi-page PDF of any length. The tool will process every page into a uniform 4×6 thermal roll sequence.

Are my shipping documents uploaded to a cloud server?

No. All PDF conversion and rendering happens locally inside your browser using WebAssembly. Your files and customer data remain private on your computer.

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MAINTENANCE IN PROGRESS

4×6 Thermal Label Converter is temporarily unavailable

We're making a few improvements to keep this tool reliable. It will be available again as soon as the work is complete.

Update from our team

Tool is undergoing scheduled optimization.

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