01
Choose a useful gray test pattern
Use uniform gray for panel shading, a smooth gradient for tonal transitions, or stepped grayscale for comparing neighboring levels. Select shadows, highlights, or the full range.
ToolsFree browser-based screen test
Gray Test Pattern Generator with Full HD and 4K PNGs
Create and download uniform gray screens, smooth grayscale gradients, or stepped charts in 1080p, 1440p, 4K, and portrait formats.
Panel testsTest workspace
Use every mode and inspect the entire panel, including corners and edges.
Test pattern
Fullscreen controls hide automatically. Move the pointer or tap to bring them back; Escape exits.
Signal range
Gradient direction
Percentages describe the 0–255 RGB signal, not screen brightness or measured light output. These SDR patterns depend on browser color management and display settings.
The PNG uses your selected pattern, range, levels, direction, and labels. View it at its original size without image enhancement.
F toggles fullscreen. Arrow keys switch modes. Escape exits.
How to use this test
How to make a grayscale test chart for a TV or monitor
02
Match the image to your display
Choose horizontal or vertical orientation and, for steps, the level count and optional RGB labels. Pick the PNG dimensions that match your screen or the player you plan to use.
03
Download and inspect without rescaling
Save the PNG and open it at its original size. Disable image enhancement and unnecessary zoom; on a TV, check the player’s fit and overscan settings before comparing edges.
What the result can tell you
What a downloaded grayscale test pattern can reveal
A local PNG lets you compare browsers, image viewers, and TV playback using the same pattern. Uniform fields expose spatial shading; ramps expose tonal discontinuities. Color profiles and playback settings can still change the displayed result.
Testing notes
PNG export preserves the selected RGB values without JPEG compression; the file uses 8-bit color channels.
A 4K image does not make a scaled player pixel-perfect. Confirm original-size playback on the target device.
Hide labels for an unobstructed visual check, then enable them when you need to identify individual gray levels.
Grayscale test pattern download questions
Can I download a 5% gray screen for a 4K TV?
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Yes. Choose uniform gray, select 5%, and export 3840 × 2160. The image uses RGB 13 across the entire field.
Will the PNG measure HDR brightness or calibrate my screen?
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No. It is an SDR visual reference, not a calibrated HDR signal or a light measurement. Use a meter and an appropriate calibration workflow for measured results.