Janoshik is a testing lab in the Czech Republic. As of Nov 6, 2026, 4 vendors we track publish COAs from it, and it ran 9 COAs of those we checked. This page lists facts about the lab and how to check one of its reports. We don't rate labs or judge their results.
The company, Janoshik s.r.o., is registered in Prague.
Open janoshik.com/verification and enter the task number at the top of the report and the 12-character key at the bottom, in capital letters. The QR code on the report opens the same record. The lab's record should show the same client, lot and results as the copy the vendor posts.
As of , we found no ISO/IEC 17025 accreditation for Janoshik in the accreditation bodies' directories. We checked the Czech national accreditation body's register as well as the US directories. ISO/IEC 17025 is the international standard for testing lab competence. An accreditation covers only the methods listed in its scope.
Per janoshik.com, Janoshik offers:
Each count is the number of the vendor's sampled COAs this lab ran, out of those we checked.
Facts come from the lab's own site and the accreditation bodies' directories. The vendor list comes from the COAs on each vendor page. How lab testing is counted →
