Test Pattern Generator — STRANYOV

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Desktop Only

Test Pattern Generator is designed for desktop use.
Open it on a laptop or PC for the full experience.

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Test Pattern Generator

Beta

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Test Pattern Generator

Modes

LED

Checkerboard grid for LED panels. Set cell size in px, cols×rows with half-module support. Canvas sub-mode lets you composite multiple screens with individual X/Y positioning.

Projection

Multi-projector blending patterns. Choose projector resolution from presets, set cols×rows and blend %. Total resolution adjusts automatically. Canvas sub-mode for complex multi-projector layouts.

Dome

Square patterns for fulldome projection. Standard mode with grid, radial lines and safe area ring. Zones mode shows distance rings from center in %.

Features

Scroll wheel Zoom in/out centered on cursor position

Middle mouse Hold to pan around the canvas

Double click Reset zoom and pan to fit view

Math in fields Type expressions like 1920+200 or 3840/2 in any number input — press Enter or click away to apply

Mask (LED) Paint mode: left click to black out cells, right click to erase. Mask covers grid, IDs and circle but not info text and border

Add to Canvas Snapshot current screen settings into Canvas mode. Each screen keeps its own colors, blend, mask. Position with X/Y fields

Auto-save All settings persist across page reloads via localStorage. Logo uploads are not saved — re-upload after refresh

Export Downloads as name_WxH.png at full canvas resolution — no scaling

STRANYOV · Test Pattern Generator · Beta

100%

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Setup

Cell px

Cols×Rows

Output

Total W—

Total H—

Cells—

Colors

Cell A

Cell B

Grid

Text

Presets

Adjust

Line thickness1px

Text size1.0×

Elements

Grid

Cell IDs

Circle

Info Text

Border

ID Format

Mask

LEFT CLICK — PAINT
RIGHT CLICK — ERASE

Masked0

Logo

Scale100%

Position

Canvas

W

H

Screens0

Screens

No screens added — use Screen → + Add to Canvas

Setup

Projector

Cols×Rows

Blend %

Output

Blend H—

Blend V—

Total W

Total H

Colors

Grid

Text

Border

Circle

Adjust

Line thickness1.0×

Text size1.0×

Grid columns12

Elements

Grid

Circles

Coords

Row Labels

Cell IDs

Proj IDs

Info Text

Blend Zones

Safe Area

Color Bars

Logo

Scale100%

Position

Canvas

W

H

Screens0

Screens

No screens added — use Screen → + Add to Canvas

Resolution

Custom

Pattern

Color

Adjust

Line1.0×

Text1.0×

Brightness100%

Elements

Circles

Grid

Crosshair

Radial

Labels

Corners

Logo

Scale100%