LabelRelay
Conversion service onlineAPI

LABEL FORMAT ORCHESTRATION

Label data in.
Print-ready PDF out.

Convert raw ZPL or Base64-encoded ZPL, PDF, PNG and JPEG data into a print-safe 4×6 label or an A4 landscape pouch sheet.

01

Add label data

Waiting for label data
Drop a label file hereZPL, TXT, PDF, PNG or JPEG · up to 8 MB
or paste the payload
02 Output layout

INTEGRATION

The portal and API share one conversion contract.

POST JSON to /api/convert. The service detects the payload type, normalizes every page to 4×6, then applies the selected sheet layout.

Automatic type detectionMulti-page PDF supportBinary or Base64 response
OpenAPI specification ↗
POST /api/convert
Content-Type: application/json
Accept: application/pdf

{
  "input": "^XA...^XZ",
  "layout": "a4-left",
  "density": "8dpmm"
}