JangleBox is a Reston, Virginia–based effects pedal company founded in 2004 by Steve Lasko. The company's flagship product, the JangleBox compressor/sustainer, was designed to capture the chiming, ringing clean tone associated with 1960s jangle pop — the sound of Beatles-era Rickenbacker 12-strings and the records made by The Byrds, along with later artists working in that tradition. The original pedal received an Editor's Pick award from Guitar Player magazine and helped establish the brand's reputation among players chasing that specific bright, sustained tone.

The product line has expanded while remaining narrowly focused on compression and related utility effects. Models include the original JangleBox, The Byrds 50th Anniversary edition, the JB Nano (a smaller-footprint version with a footswitch-accessible Treble Boost aimed at live use), the JB3 (a two-sided compressor with discrete EQ and gain for solo boosts), the JBX, the Acousticomp for acoustic guitars, and the J-Boost and J-Gate. Pedals are built in the United States and feature preset Dark, Normal, and Treble Boost voicings.

The brand is closely associated with jangle, roots, and Americana guitar styles, and its endorsers include Roger McGuinn of The Byrds, Peter Buck of R.E.M., Mike Campbell of The Heartbreakers, Marshall Crenshaw, and bassist Billy Sheehan.

Jangle Box has 3 products cataloged on Equipboard, including Compressor Effects Pedals. Their gear is featured by 8 artists, with the strongest followings in Rock, Pop, and Folk, World, & Country. Notable users include Mike Campbell, Brian D'Addario, and Elliot Easton.