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Event Horizon Suite — Professional Tools for AI Artists
A collection of high-quality, offline-first tools designed specifically for serious AI image creators.
All tools are single HTML files — no installation, no accounts, no subscriptions, and 100% offline. Everything runs locally on your machine.
EHTrueColor v2 — Free Monitor Calibrator
Visual test suite to check and improve your monitor’s brightness, contrast, color accuracy, sharpness and uniformity.
7 professional test panels
Interactive sliders + fullscreen mode
Works completely offline (single HTML)
Ideal for AI art creators and designers
Description
Calibrate your monitor properly in minutes with this powerful visual testing tool.
EHTrueColor v2 helps you check and adjust brightness, contrast, color accuracy, sharpness, uniformity, gradients, dead pixels and more — everything you need to ensure your screen is showing colors and details correctly for AI art, photo editing, or design work.
What it includes:
7 Professional Test Panels
Brightness & Contrast (gradient + grayscale steps)
Color Accuracy (RGB balance + temperature)
Sharpness (multiple test patterns)
Uniformity (screen bleeding & backlight check)
Shadow & Highlight Detail
Color Gradients (banding test)
Dead / Stuck Pixel Detection (all colors)
Interactive Tools
Real-time sliders with live preview
Fullscreen mode for every test
Before/After comparison
One-click adjustment presets
Completely Offline — Single HTML file. Nothing is uploaded. Works in Chrome, Edge and Firefox.
Perfect for AI artists who want accurate colors when generating or editing images with SDXL, Flux, ZIT, Illustrious, etc.
Free forever. No ads, no accounts, no telemetry.