Denio is a budget guitar effects pedal brand associated with manufacturing in Taiwan and the Philippines, with most of its catalog dating to the late 1980s and early 1990s. The lineup consists of compact stompboxes that closely follow the form factor and circuit layouts of popular Boss pedals of the era, offered at a much lower price point aimed at beginner and hobbyist players.

Known models include the DS-30 Distortion, MR-70 Metal Rocker, CH-40 Chorus, FL-20 Flanger, PH-50 Phaser, CS-60 Compression Sustainer, DR-80 Delay, DL-05 Analog Delay (built around an MN3208 BBD chip), SD-10 Super Over Drive, and a VP series volume pedal. The pedals typically feature simple three-knob control layouts housed in metal enclosures styled after the Boss compact series.

Denio pedals turn up primarily on the used market through sites like Reverb and eBay, and in the pedal-modding and DIY effects community, where their circuits are often discussed alongside other budget Taiwanese-era clone brands such as Rockson and Maxtone.

Denio has 6 products cataloged on Equipboard, including Distortion Effects Pedals, Delay Effects Pedals, and Phaser Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock, Blues, and Classical. Notable users include Enrico Laoagan.