Generator · Free · In-browser
One image in, one skin out
Follow the four steps and walk away with a showcase-grade Codex skin. Your image never leaves your browser.
Generate the artwork
Copy this prompt into Midjourney / DALL·E / Jimeng and generate the image (one-click generation via API is coming). Fields in step 3 update this prompt live:
Drop the image here
⚠ Image is narrower than 2000px — it will still work, but a wider image looks sharper.
Personalize
Colors and shell are auto-set from your image — click to adjust.
Faithful preview of the engine's home shell: full-window art, left scrim banner, decorated cards, particles, handwritten quote. Every element here is what the 676-line engine actually renders.
Install to Codex
Step 1 — save the prepared image to your Downloads folder:
Image + bilingual install notes for macOS & Windows. Windows: the upstream engine does not support the image picker yet — the ZIP includes your image and steps to swap it into windows/assets.
Option A — Let Codex install it for you (recommended, no terminal)
Paste this prompt into the Codex desktop app. Codex will clone the engine, install, apply your skin, restart itself once, and show you verification screenshots:
Option B — Manual, two terminal commands
First install the free open-source Dream Skin engine (one time only):
Then apply your skin:
Engine: Fei-Away/Codex-Dream-Skin ↗ · Full install guide →
Prefer prompts over pictures? There is also a way to let Codex design its own theme — the codex-skill method →