Lob Help Center

Launch checklist


Getting started

Use this quick list to get started using Lob:

What should I test as I integrate Lob?


Before you go live, verify that your mail pieces are rendering correctly. Lob's dashboard will show proofs of the mail piece you create. The proofs are also available in the API response.



  • Verify your PDF is PDF/X-1a compliant
  • Embed all images and fonts and flatten your transparencies
  • Use CMYK Color Space


  • Lob's HTML render is based on Webkit, but is highly modified to be used with Lob. Test rendering by using your test API key and checking the dashboard for proofs, instead of designing using the browser.


  • Verify that your images are at least 300 DPI. This will prevent blurry prints.


As you integrate Lob, you may find it useful to view logs of your requests. If you send a request with your Test or Live API key, both the request and response will be logged to use for debugging.

For Enterprise customers 

Consider these additional steps to send large mail volumes at scale: 


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