Best 21 Inch 4K Monitors of 2025

The Dell S2721QS 27" 4K UHD IPS Monitor is a stunning display with a three-sided ultrathin bezel design in 4K UHD (3840 x 2160) resolution. It features AMD FreeSync technology for smooth, tear-free gaming, and a height adjustable stand with tilt, swivel, and pivot features for all-day comfort. Customers report great quality with no dead or always-on pixels, and the built-in speakers (3w) sound better than expected. However, the stand is not as great as other Dell monitors, and the monitor has no USB hub or DisplayPort cable.

The Acer 21.5 Inch Full HD (1920 x 1080) IPS Ultra-Thin Zero Frame Computer Monitor (HDMI & VGA Port), SB220Q bi is a great choice for casual use. It has vibrant colors and sharpness, a wide range of control to tweak the image quality, and a “100,000,000:1” Dynamic Contrast Ratio (DCR). However, it has thicker bezels than desired, a top-down viewing angle that is darker, and a 15° degree back tilt.

The Sceptre U275W-UPT monitor delivers 4K resolution with 8 million pixels, providing an extraordinary landscape of color variation, contrast, and clarity that mirrors the real world. The IPS panel provides consistent and accurate color performances from multiple angles. With up to 70Hz refresh rate, images change faster and smoother than the standard, reducing screen tearing. The monitor also offers anti-flicker technology and blue light shift application to reduce eye fatigue. Additionally, it comes equipped with 99% sRGB, providing a wider color gamut than most conventional monitors.

The Packard Bell 21 Inch FHD Computer Monitor is a great option for both gaming and office use, equipped with a 1920 x 1080p resolution, fast 75 hertz refresh rate, and 5 ms response time that provides a smooth and seamless experience. It is VESA mount compatible, has an adjustable stand with a wide viewing angle of 178 degrees, and is compatible with PC, Xbox, and PS5.

The Acer 21.5" IPS Monitor is a sleek and versatile display suitable for home, gaming, or office use. With AMD FreeSync Technology, you can enjoy smooth gameplay without screen tearing. The 1ms VRB response time ensures quick pixel transitions for a seamless viewing experience. At a refresh rate of 100Hz, action-packed scenes are rendered smoothly. The ultra-thin design adds a modern touch to your setup, while the ergonomic tilt feature allows you to adjust the screen for comfortable viewing.

The KTC 27 Inch Monitor delivers stunning 4K visuals, making every detail pop for an immersive experience, whether you're gaming or working on design projects. With its vibrant IPS panel, you can enjoy accurate colors and wide viewing angles, essential for creative professionals. The monitor also features versatile connectivity options, allowing you to easily switch between your PC, gaming console, or other devices. Plus, the built-in Anti-Blue Light Screen helps reduce eye strain, ensuring you can work or play comfortably for hours on end.

The LG UltraFine 27-Inch 4K UHD Monitor is a top-of-the-line monitor that boasts VESA DisplayHDR 400 high dynamic range compatibility, 99% coverage of the sRGB spectrum, and AMD FreeSync technology. With 400 nits of brightness, this monitor brings work and virtual worlds to life with elevating textures, elements, character movements, and natural light and shadow. It also transforms standard content into HDR-quality video right on the screen, improving the tone mapping and luminance of SDR content for an HDR-like experience. Customized game modes optimize your gaming conditions with two first-person-shooter (FPS) modes and a real-time strategy (RTS) mode as well.

The ASUS VP229Q Monitor is a 21.5-inch Full HD display with a wide viewing angle panel, making it ideal for enjoying movies, videos, and games. With a refresh rate of up to 75Hz and Adaptive-Sync/FreeSync technology, this monitor ensures smooth and clear video playback without any lag or screen tearing. The ASUS Eye Care technology incorporated in this monitor includes Flicker-free and Low Blue Light technologies, which reduce eye strain and fatigue, allowing you to work or play for longer hours comfortably. Additionally, the Color Augmentation feature enhances color differentiation, providing vivid and lifelike visuals. The ASUS VP229Q Monitor also offers extensive connectivity options and comes with built-in stereo speakers for an immersive audio experience.

The KOORUI 27" 4K UHD Monitor N07 offers immersive viewing with a three-sided ultra-thin bezel design, delivering super clear visuals with 90% DCI-P3 color gamut coverage. With IPS technology and 99% sRGB color coverage, you can enjoy extraordinary colors from any angle. The 27-inch monitor provides superior black performance and stunning visuals with HDR10 technology. The 60Hz refresh rate and OD response time make it ideal for leisure gaming, ensuring faster and smoother image transitions. The extensive connectivity ports and single cable connectivity streamline your workspace, reducing clutter and offering flexibility.

The KTC 4K Gaming Monitor delivers a breathtaking visual experience with its 3840 x 2160 resolution, allowing you to enjoy stunning graphics in games and videos. With a refresh rate of 144Hz and a rapid 1ms response time, you will experience smoother gameplay without lag or blurriness. The monitor’s impressive 134% sRGB color gamut brings vibrant colors to life, enhancing your overall viewing experience. Plus, its versatile connectivity options make it easy to connect multiple devices, ensuring a streamlined setup for your gaming or work needs.