Make Codex feel like yours.
Attach your own image, or ask Codex imagegen to create one locally first. The Skill turns either image into a custom Codex theme.
No CSS editing. No Codex files modified. Reversible in one command.
Try a theme — live preview
Three steps. Ninety seconds.
From a plain Codex window to a workspace that feels like yours.
Install the Skill
One command adds the open-source GptSkin skill to Codex. Free presets work instantly — no account, no setup.
Create or attach an image
Ask Codex imagegen for a local visual, or attach your own image. Every paid custom theme uses the same image pipeline.
Applied to Codex
The Skill applies the theme locally over a loopback-only connection. Restore the default look anytime with one command.
Theme Gallery
Start with a free preset, or explore custom themes created by the community.
Custom image themes cost 20 Credits. Reapplying a saved theme is free.
Free Presets
No account needed
FREEAurora Borealis
Northern lights over arctic snow — aurora green on polar night
FREESnow Peak
Moonlit snow mountains — ice blue accents on deep slate
FREECity Lights
Night skyline from above — warm amber on midnight blue
FREEDark Void
Milky way over the void — violet accents on deep space
FREESunset Glow
Golden hour over the sea — warm ember on twilight
FREEMinimal Light
Alpine snow under clear sky — airy blue on white
Beautiful outside. Boring inside.
The injection mechanism is deliberately unsexy: open, local-only, and reversible.
Open-source Skill
Every line of the skill and injector is public on GitHub. Audit it before you run it.
Local-only injection
CDP binds to 127.0.0.1 only. The Skill disconnects after injection; the port closes when that Codex process exits.
Official app untouched
No modified binaries, no patched asar, no changed signatures, API keys, or base URLs. Ever.
One-command restore
Say "restore the default Codex theme" and every trace of injection is removed. Codex restarts clean.
macOS + Windows
Both platforms supported from day one, with the same apply, pause, diagnose, and restore lifecycle.
Secure checkout by Creem
Payments, taxes, and refunds are handled by Creem as Merchant of Record. We never see your card.
Built for people who live in Codex
Eight hours a day deserves a workspace that isn't default gray.
Builders
Independent developers who spend all day in Codex and want a workspace that matches their visual style.
Creators
Streamers and tutorial makers who need a recognizable screen. Your theme becomes part of your brand.
Teams & brands
Use your brand artwork and palette as the source image for a consistent Codex workspace.
Start free. Pay once.
Free presets forever, no account needed. Sign up and verify your email for 20 Credits—enough for one custom image theme. One-time packs, never a subscription.
Starter — $9.9
100 Credits. Perfect for trying custom themes with your own images.
Pro — $19.9 · Most Popular
500 Credits. For creators who switch themes often.
Studio — $49
1,500 Credits. For heavy users and small teams.
Frequently asked questions
More questions? Read the docs or email support@gptskin.best.
Make Codex yours.
Install the skill, pick a preset, and see your workspace change in under a minute.