REST API
Integrate label conversion, generation, and processing directly into your warehouse management systems (WMS) or ERPs. Built for speed and reliability.
Scale to millions of labels generated per day.
Sub-100ms latency for real-time operations.
Geographic redundancy and latency-based routing.
Your first label, this afternoon.
Official LabelZoom libraries for .NET, Node, Java, Python, PHP, Go, Ruby and Rust. Install one package, write one line, get a label back — no HTTP plumbing to build and maintain.
npm install @labelzoom/sdkconst client = new LabelZoomClient(); const label = await client.convert() .fromZpl(zpl) .toPdf() .execute();
Try it before you sign up
No API key required to get started. Install the library, run the example, and you'll have a real label back in minutes — add your key when you're ready to go to production.
The same everywhere
Every library is tested against one shared suite before release, so they all behave identically. Teams running Java in the warehouse and Python in the back office get the same results from the same labels.
Every format, both directions
ZPL, EPL, TSPL, DPL, PDF and images — convert into any of them and back out again. One library covers every printer language your sites use, not just the one you started with.
Working in another language? The API is a standard REST call from anything that can make one — see the documentation. Every library above is checked against the same shared conformance suite, so the wire behaviour is identical whichever you pick.
Ready for your production shipping lane.
When a mis-rendered label stops a conveyor or fails a carrier audit, "close enough" isn't. LabelZoom is built and operated for workflows where labels are mission-critical.
Decode-verified barcode accuracy
A barcode that scans but carries the wrong payload is worse than an error. Our rendering engine's barcode output is verified by decoding the rendered symbols back — the same check a scan tunnel performs — not by eyeballing pixels.
Uptime SLAs up to 99.99%
Pro plans carry a 99.9% SLA, Business 99.95%, and Enterprise 99.99% — backed by geographic redundancy and latency-based routing across regions. Check current status any time at status.labelzoom.com.
Data retention you can put in a DPA
Shipping labels carry customer addresses. On Pro plans and above, label payloads are not retained after conversion; Enterprise plans support custom retention and data-residency requirements. Data processing agreements are available for enterprise customers.
A real company behind the API
LabelZoom is operated by RJF Technology Solutions LLC with a staffed support desk, invoicing for procurement, dedicated account management on Enterprise, and a stable release train — not an anonymous side project.
Simple, predictable pricing
Full access to conversion tools and the core engine. Choose the tools your logistics operation needs to scale.
Free
Basic
Pro
Business
API & Web App Feature Comparison
A detailed breakdown of what's included in each API subscription plan.
| Feature | Free | Basic | Pro | Business | Enterprise |
|---|---|---|---|---|---|
| Conversions per month | Unlimited (Watermarked) | 1,000 | 10,000 | 1,000,000 | Unlimited |
| API Access | Basic | Basic | Production | Production | Custom |
| Multi-page PDFs | |||||
| Self-service API Keys | |||||
| Large Files (>1 MB) | |||||
| Latency-based routing | |||||
| SLA | None | None | 99.9% | 99.95% | 99.99% |
| Data Retention | Standard | Standard | None | None | Custom |
| Release Train | Beta | Beta | Stable | Stable | Stable |
| Support | Community | Priority Email | Phone & Email | Dedicated Account Manager | |
| Data Residency |