Free to try

Amazon Seller Flex & Vendor Central Label Helper

A free browser extension that improves Amazon Seller Flex and Vendor Central labels: stamp your SKU, quantity, master code and sequential numbers on every label, and print straight to your thermal printer via QZ Tray.

  • Stamp SKU + master code + quantity on every label
  • Smart-sort and number your Seller Flex batch
  • Print direct to thermal via QZ Tray
Live demo, no signup to preview

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SKU + master code overlay
Direct thermal print (QZ)
Smart sort + numbering
Free browser extension
Why sellers use it

Built for how you actually ship

SKU & master code on every label

The extension overlays your SKU, quantity and a cross-account master code onto each Seller Flex / Vendor Central label as it prints, so packers stop mis-picking.

Smart sort + numbering

Auto-number a batch and sort by order complexity so packers work top-to-bottom without hunting.

Direct thermal printing

Print labels straight to your Zebra/TSC thermal printer via QZ Tray, no save-and-open PDF dance.

Both Amazon portals

One extension works on both Amazon Vendor Central and Seller Flex: the same SKU, master-code and numbering everywhere.

3 steps

From marketplace PDF to print in seconds

01

Install the free extension

Add the LabelFlow extension to Chrome and sign in with your EditLabel account.

02

Open your VC / Seller Flex labels

The extension detects the labels and overlays your SKU, master code, quantity and numbers automatically.

03

Print to thermal

Print straight to your thermal printer via QZ Tray, pre-sorted and numbered.

FAQ

Common questions

Last updated July 2026

Which Amazon portals does it work on?+

Both Amazon Vendor Central and Amazon Seller Flex. The single LabelFlow extension enhances labels on both.

Does it stamp my SKU and master code?+

Yes. It overlays your SKU, quantity and a cross-account master code on every label as it prints.

Can it print directly to my thermal printer?+

Yes, via QZ Tray: labels go straight to your Zebra/TSC printer without saving a PDF first.

Do I need anything installed?+

The free Chrome extension and QZ Tray for direct printing. Sign in with your EditLabel account to enable it.

Is it free?+

The core overlay is free; bulk features and direct printing are part of Pro / the extension.

Ready to clean up your labels?

Process and preview for free. Create an account to download print-ready PDFs and unlock bulk.