Question 1

What is FCKZPL?

Accepted Answer

FCKZPL is a free online ZPL II (Zebra Programming Language) viewer and renderer. It converts ZPL label code into PNG and PDF images in real-time, supporting 50+ ZPL commands and 22 barcode formats.

Question 2

Is FCKZPL a Labelary alternative?

Accepted Answer

Yes. FCKZPL provides a Labelary-compatible REST API. You can replace api.labelary.com with fckzpl.com in your existing code without any other changes. The URL pattern, request format, and response format are identical.

Question 3

What barcode formats does FCKZPL support?

Accepted Answer

FCKZPL supports 22 barcode formats including Code 128, Code 39, Code 93, EAN-13, EAN-8, UPC-A, UPC-E, QR Code, DataMatrix, Aztec, PDF417, MaxiCode, GS1-128, ITF, CODABAR, MSI, POSTNET, and several postal formats.

Question 4

How do I use the FCKZPL API?

Accepted Answer

POST your ZPL code to https://fckzpl.com/v1/printers/8dpmm/labels/4x6/0/ with Content-Type application/x-www-form-urlencoded. The response is a PNG image. For PDF output, add the header Accept: application/pdf. Full documentation at https://fckzpl.com/api.html

Question 5

Can I use custom fonts with FCKZPL?

Accepted Answer

Yes. Upload TTF/OTF font files via the Font button, then use the ^CW command to assign them to a font designator. For example: ^CWX,R:MYFONT.TTF then ^AXN,30,30 to use it. Built-in fonts include Swiss 721 BT and Google Noto Sans.