A compact synthesizer is a smaller, more streamlined synth designed to be portable and space-efficient without sacrificing essential features and sound quality. These synthesizers are typically built to have a reduced footprint, making them easier to carry around or fit into limited studio or stage setups. Despite their size, compact synths often include a versatile range of sounds and functions, such as multiple oscillators, filters, effects, and sometimes even sequencers or arpeggiators. They are ideal for musicians or producers looking for a capable instrument that can be easily transported or fit onto a crowded desk or stage rig.

Compact synths might feature mini keys, knob-based controls, or even touch interfaces to maximize usability within a small form factor. Popular examples include the Korg microKORG, Roland Boutique series, and Arturia MicroFreak. They are designed to balance functionality with convenience, offering musicians a way to explore creative ideas without requiring a full-sized, heavyweight synthesizer. These compact designs are often well-suited for live performers, travelling musicians, and home studio producers who want a versatile instrument without taking up too much space.