Procedural. Deterministic. Perpetual.
ScreenTone Eternal is a professional offline halftone engine for precision color separation. Designed for total control, it utilizes deterministic image processing to create archival-quality reproductions without cloud dependencies.
*Now includes an optional BYOK utility to generate AI input images directly into the workflow.
Own It Outright. No Subscriptions.
ScreenTone Eternal is the flagship, lifetime-license edition of the Max Chroma software ecosystem. One-time purchase, no online activation, no recurring fees. Ever.
The "Build-to-Own" Guarantee
A flexible, fair-value path to the full ecosystem. Every dollar you spend on any module applies directly to the $400 Full-Stack Perpetual Edition. Upgrade at your own pace and only ever pay the difference.
10 Screens+ Full-Stack
The complete perpetual engine with all screen modules and future expansions.
Buy NowWhat You Get in the Full-Stack Perpetual Edition
Full 10-Screen Stack (and Beyond)
Access the complete halftone engine with all 10 screen modules — plus any future architecture expansions that increase screen count or add new pipelines.
Lifetime Free Upgrades
Every upgrade, every improvement, every major version — yours forever at no additional cost.
Research Builds + Early Experiments
Get bleeding-edge test apps, prototype engines, and experimental ideas before they become public.
UMSC (User-Modifiable Source Code)
Study, learn, and modify the engine for personal use. No DRM. No activation checks. No forced cloud. True ownership.
Feature Parity Across Every Edition
Even if you buy a smaller module, you receive all core engine upgrades, performance improvements, bug fixes, and UX/UI refinements.
Optional: BYOK Input Integration
We've added a convenience layer for those who want to use AI. Bring Your Own Key (BYOK) from Google AI Studio to generate concepts or test images, then immediately pipe them into the halftone engine for processing.
Input & Testing Utility
Use the integrated interface to quickly generate source material or test patterns without leaving the app, then apply the engine's deterministic filters.
Zero Markup
You connect directly to Google via your own API key. We don't resell credits, we don't charge for prompts, and we don't stand in the middle.
Seamless Pipeline
Go from "Concept Generation" to "Print Ready Separation" in one view. It's a workflow accelerator, not a dependency.
Privacy, Security & Data Flow
ScreenTone Eternal is engineered for maximum user ownership and zero data custody. Below is exactly how your data flows — and when it does not.
We Never Handle Your AI Traffic
Once this app loads in your browser, all AI requests travel directly between your device and the AI provider using your own API key. ScreenTone Eternal never proxies, logs, stores, or inspects your prompts, images, or responses.
HTTPS = Encrypted End-to-End
When using the Browser Edition, PWA, or domain version, all AI traffic is protected with HTTPS encryption. Prompts, API keys, and image data are encrypted in transit between your browser and the AI provider.
Secure Local Server = Encrypted HTTPS
The Secure Server Edition runs at https://localhost using a locally trusted HTTPS certificate. All online AI requests made through this mode are fully encrypted in transit, just like a production website. When the secure server is not running, the app may still operate from offline browser cache, but no encrypted network traffic is possible until the server is restarted.
API Keys Are BYOK Only
You always supply your own AI API key. We do not issue, resell, pool, log, or manage shared keys. API key storage is disabled by default and only saved locally if the user explicitly enables it.
IP Address Disclosure
Any time you connect to an online AI provider, your IP address is visible to that provider. This is a property of the internet itself and applies equally to browsers, scripts, Postman, and all networked software.
Future-Proof Offline AI
ScreenTone Eternal is evolving toward fully offline WebGPU and local-model inference. This future mode eliminates internet traffic, API keys, and third-party data exposure entirely.
Downloads & Versions
Choose the version that works best for your workflow. The browser-based app runs anywhere, while the Server Edition offers enhanced performance for local processing.
🌐 Browser Edition (Recommended)
The standard version runs directly in your browser with no installation required. Perfect for most users and fully offline-capable once loaded.
🖥️ Secure Server Edition (v223)
A standalone package with a built-in secure HTTPS server for encrypted local processing. Ideal for power users who want maximum performance, full encryption, and true offline operation.
⚠️ Important: Executable Download Notice
This package contains a Windows executable (.exe) file. Your browser or antivirus
may display warnings — this is normal for any downloaded executable.
Having trouble downloading or running? Click here for help.
If your browser blocks the download:
- Look for a "Keep" or "Download anyway" option in your browser's download bar
- In Chrome: Click the ⋮ menu on the blocked download → "Keep dangerous file"
- In Edge: Click "Keep" → "Keep anyway"
- In Firefox: The download should proceed normally
If Windows SmartScreen blocks the app:
- Click "More info" on the SmartScreen popup
- Then click "Run anyway"
If antivirus quarantines the file:
- Add an exception for the ScreenTone Eternal folder
- Or temporarily disable real-time scanning while extracting
To run the server:
- Extract the zip file to a folder of your choice
- Double-click
Start_ScreenTone_Eternal.batto launch the encrypted local server - Your browser will automatically open to
https://localhost - Close the control window to fully shut down the secure server
📋 Portable Use Notice
When run on a shared or public computer, the Secure Server may temporarily install a trusted local HTTPS certificate and allow the browser to cache the app for offline use. No background services remain after closing the server, but cached site data and local trust settings may persist until manually cleared.
For Artists, Printers & Color Experts
ScreenTone Eternal is engineered for professional-grade halftone control, color mapping, separation, experimental workflows, and archival-quality reproduction. Precision results depend on calibration and technique, but the engine gives you the full power to achieve world-class output.
Extensive video guides offer step-by-step workflows using both FreeSeps and Eternal.
Own Your Tools. Own Your Workflow.
Reach out for licensing questions, collaborations, or support. Every message comes directly to the Max Chroma studio inbox.
Email: minmaxchroma@gmail.com
Phone: (680) 422-5608