4K HDMI Video Encoder/Decoder ZowieBox - Compact 4K NDI HX3 Converter

In this review the ZowieBox 4K HDMI Video Encoder/Decoder stands out as a compact, travel-friendly streaming tool aimed at gamers, small studios and AV technicians who need low-latency 4K capture and flexible output options. The single biggest reason to buy is its combination of certified NDI|HX3 conversion and zero-lag HDMI passthrough in a device smaller than a phone, which lets users stream console gameplay or decode an IP stream to a 4K HDMI display without a bulky PC setup.

Key Features

• Compact design: Smaller than most phones and including a tally light and LCD, it is easy to mount and monitor while streaming.
• Zero-lag passthrough: Accepts 4Kp60 input and can loop out 4Kp60 while providing a separate stream output to avoid affecting gameplay.
• NDI|HX3 conversion: Encodes HDMI to NDI|HX3/HX2/HX for low-delay remote production workflows with OBS or vMix.
• Web UI control: Full configuration from PC, phone or tablet lets users preview video, control PTZ, toggle tally and adjust stream settings remotely.
• Flexible power and mounting: Supports PoE up to 100 meters or USB-C power banks, and offers DC out to power small accessories or PTZ cameras.
• Decoder and extender modes: Can decode IP stream to 4K HDMI and be paired as an HDMI over IP extender using two units on a LAN.

Who It's For

The ZowieBox is best for console streamers who want a PC-free streaming solution, e-sports teams needing low-latency NDI feeds to remote production, and AV integrators who need a compact 4K encoder/decoder for pop-up installs. Its small size and PoE support suit on-location shoots and crowded desks.

It is less ideal for users who require simultaneous encode and decode operation or who expect a full USB capture card replacement; the device must be switched between encoder and decoder modes and does not currently act as a USB capture card for a computer.

Pros & Cons

Pros

• Excellent 4K capture and loop out performance with clear display on 4K TVs and monitors.
• Certified NDI|HX3 conversion for low-delay remote workflows with OBS or vMix.
• Portable power options and web UI make setup and control really convenient on the fly.
• Tally light and LCD provide useful live status feedback for streamers and crews.

Cons

• Cannot encode and decode at the same time, requiring mode switching for different tasks.
• USB capture card function is not supported, so it will not replace some PC-centric capture workflows.

Specifications

Product type	4K HDMI encoder/decoder
Max input	4Kp60 HDMI input (loop out 4Kp60)
Streaming output	4Kp30 or 1080p60 via IP; NDI|HX3/HX2/HX and SRT/RTMP(S)/RTSP supported
Modes	Encoder or decoder (switchable, not simultaneous)
Control	Web UI (PC/phone/pad) and OBS Dock integration
Power	PoE (up to 100 m) or USB-C power; DC out for external devices
Extras	Tally light, LCD status screen, tripod/SLR mountable

Our Verdict

The ZowieBox is a strong choice for gamers and small production teams who need compact NDI|HX3 conversion and true 4K passthrough without a PC. Its portability, web UI control and certified NDI support make it excellent value for remote and on-site streaming, provided you can work within the single-mode limitation and the lack of a USB capture card function.

Frequently Asked Questions

Can the ZowieBox stream without a PC?
Yes. In encoder mode it can stream standalone to platforms or to NDI streams without a connected PC.

Does it support full NDI?
The device uses certified NDI|HX3 conversion and supports NDI substream workflows, but it does not claim to support full-bandwidth original NDI.

Can it power PTZ cameras?
It can supply DC out to power small external devices like PTZ cameras and supports PoE for network power delivery.