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Home›Documentation›Frequently Asked Questions

Frequently Asked Questions

Frequently asked questions about Labelixa: rendering issues, character support, error messages, the free tier and the on-premise option.

Why does my label render not at all or incorrectly?

The most common causes: an unsupported command (listed in the X-Warnings header), a wrong dpmm/size, or a CORS block from the browser. Check the X-Warnings response header first.

Are special characters (accents, ß, ı, ş, ğ) supported?

Yes. The engine uses a font that supports Latin Extended characters and assumes UTF-8. Send your ZPL as UTF-8; ^CI28 is recommended.

What does a rate-limit / quota error (429) mean?

You exceeded the per-second request limit, the daily label ceiling or your monthly label/request quota. The X-Quota-Reason header names the window and X-Quota-Reset the renewal time; wait, or move to a higher plan.

Is there a guarantee for the free tier?

No. No plan comes with a service-level agreement (SLA); a dedicated SLA is provided only under a separate contract. For production use a paid plan is recommended.

What is the difference between the Label API and the Barcode API?

The Label API (/v1/printers) renders full ZPL labels. The Barcode API (/v1/barcodes) produces a single barcode without knowing ZPL; its audience and usage are different.

Can I run it on my own server (on-prem)?

Yes, the engine is stateless and can be packaged as a single Docker image. A custom font can be defined with LABELIXA_FONT. Contact us for enterprise requirements.