Jerms is a small-batch effects pedal operation run by Jim Roth, longtime guitarist of the indie rock band Built to Spill. Built around hand-wired construction and a deep collection of vintage reference units, the brand specializes in faithful recreations of classic fuzz and overdrive circuits, voiced by ear against the original pedals Roth owns.

The lineup leans heavily on fuzz, with builds modeled after the Tone Bender MkI, MkI.5/MkII, Sam Ash Fuzzstainer, germanium Pep Box, silicon Fuzzrite, and ram's-head Big Muff, alongside takes on the ProCo Rat and Z.Vex Fuzz Factory. Pedals are produced in limited quantities and sold direct through Reverb (jermshop) and the brand's Instagram, rather than through traditional retail channels, which has earned Jerms a cult following among fuzz collectors and players hunting period-correct vintage tones.

Jerms has 2 products cataloged on Equipboard, including Fuzz Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include J Mascis.