YUV Viewer

YUV Viewer is a focused macOS app for working with raw YUV video files: load, inspect, and — with the Scopes Pack — measure the signal using broadcast-style waveform and vectorscope tools.

Whether you're debugging a video pipeline, verifying a colour conversion, grading footage or learning how YUV actually works, YUV Viewer gives you the precision you need without launching a full NLE.

Inspect raw YUV
• 30 YUV formats — every common planar, semi-planar and packed layout in 8-bit, 10-bit and 16-bit
• Six colour matrices — BT.601, BT.709, BT.2020/2100, SMPTE 240M, BT.470 B/G — with Auto selection based on resolution and bit depth
• Limited (TV) and full (JPEG) range conversion
• Real-time format switching with instant preview
• Flexible dimensions with presets for HD, 4K, VGA and custom sizes
• Auto-fit and manual zoom (25%–400%)
• Drag and drop loading
• Recent files for quick return to in-progress analysis
• Export decoded frames to PNG or JPEG
• Full macOS sandboxing with security-scoped access

Measure the signal — Scopes Pack
Unlock five broadcast-style scopes via a single in-app purchase:
• Vectorscope — chroma distribution on the UV plane
• Waveform — luma values across the picture
• RGB Waveform — per-channel luminance for grading
• Parade — R, G and B side by side for white balance and matching
• CIE Chromaticity — colour gamut against the visible spectrum

Switch between the image and any scope from the toolbar or View menu. Scopes update with the loaded frame and respect your selected format and matrix.

Supported formats
8-bit: YUV420p, YUV422p, YUV444p, NV12, NV21, NV16, YUY2, UYVY, YUVj420p, YUVj422p, YUVj444p, YUV410p, YUV411p, YUV440p, YUVj440p
10-bit: YUV420p10LE/BE, YUV422p10LE/BE, YUV444p10LE/BE, P010LE/BE
16-bit: YUV420p16LE/BE, YUV422p16LE/BE, YUV444p16LE/BE

Built for
• Video engineers and developers — debug pipelines, verify conversions, test codecs, isolate artefacts
• Colourists, DITs and post-production — measure exposure, gamut and white balance from raw frames
• Broadcast QC — catch illegal levels and chroma excursions before they ship
• Students and researchers — see and measure what YUV actually looks like

Why YUV Viewer?
Most tools either decode YUV without measuring it, or measure encoded video without showing you the raw planes. YUV Viewer does both, in a single focused macOS app built for inspection rather than editing.

Scopes Pack — in-app purchase
The Scopes Pack is a one-time purchase that unlocks all five scopes.