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JetLabel^™

Design

Designer canvas Text & fonts Shapes, images & PDF Templates & library

Codes & data

Barcodes & QR Image → Thermal Data sources & FBA Serial numbers

Direct & batch printing Printer discovery Thermal hardening Preflight & QA

Image → Thermal

See any logo or photo in 1-bit with five dithering methods — live.

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TSC

TSC TE310 TSC TE210 TSC DA220

Zebra

Zebra ZD421 Zebra ZD420d Zebra GK420d

Brother · DYMO · Deli

Brother QL-820NWB DYMO LabelWriter 550 Deli DP23

Compatibility Center

Every tested printer with setup steps, test prints and known issues.

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Convert

Image → Thermal (1-bit) Image → PDF label SVG → label

Generate

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Calculate & check

EAN / UPC check digit GS1-128 builder Label size calculator DPI ↔ mm calculator

Free online tools

Runs in your browser.

No upload, no signup — the same engine that ships in the app.

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Printers · Seiko

Seiko SLP 620 on Mac — Setup & Label Printing with JetLabel

Compatible (community-reported)

The Seiko SLP 620 is a proprietary SII-raster label printer. JetLabel uses a dedicated encoder for direct printing over USB on macOS.

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Seiko SLP 620 — spec sheet

Protocol

proprietary

Resolution

203 dpi

Interfaces

USB

Driverless

Partial

macOS driver

Yes

Recommended

60 × 30 mm, 100 × 150 mm

Does the Seiko SLP 620 work on macOS?

Yes — the Seiko SLP 620 works on macOS with JetLabel via a dedicated encoder.

Print to your Seiko SLP 620 today.

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Seiko is a trademark of its respective owner. JetLabel is independent and not affiliated with Seiko. Compatibility marked “community-reported” has not been individually verified.