CodexSkinBrowse themes
Theme your focus

Make Codex
feel like yours.

Discover refined Codex themes, custom backgrounds, and clear setup guides for macOS and Windows.

Explore Codex themes How to customize Codex
Safe by designNo tracking or image upload.
Open & transparentReview the upstream source.
Local firstYour theme stays with you.
CodexObsidian Ember
theme.css
main ReadyLn 11, Col 1
Theme
Obsidian EmberDeep focus
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Curated collection

Themes that set the tone.

Handpicked Codex app themes and background ideas for every kind of focus.

Browse all themes
Obsidian Ember abstract Codex theme backgroundDeep focus

Obsidian Ember

Graphite calm with a warm copper edge.

Astral Violet abstract Codex theme backgroundCool focus

Astral Violet

Nocturnal violet with a subtle electric lift.

Pine Depths abstract Codex theme backgroundGrounded

Pine Depths

Dark mineral green for long, quiet sessions.

Obsidian Ember abstract Codex theme background
accent#c5533a
Local theme studio

Frame the art. Tune the interface. Export what you can inspect.

Upload a background, adjust crop and readability, compare Home, Task, and Diff, then export a data-only recipe compatible with the open-source workflow.

  • Live Codex workspace preview
  • Local image processing
  • Reviewable ZIP with hashes
Open theme studio
A clear trust boundary

Design online. Install only what you reviewed.

The website makes the visual recipe. The local engine handles Codex separately.

01

Choose and frame

Start with artwork you own. Keep detail away from the reading column.

02

Tune real surfaces

Adjust crop, dim, blur, panel opacity, and readable theme colors.

03

Export the recipe

Download data files and hashes—never a disguised executable installer.

04

Review and apply

Inspect the open-source engine, install locally, verify, and keep a restore path.

Built around an open-source engine

Codex Dream Skin keeps the native Codex interface interactive and applies themes without replacing the official app bundle.

Review source
Official-compatible link

Pet Link Lab

Validate the official sprite requirements locally, then build a supported install link from an HTTPS URL you control.

Your local file never leaves this browser.
Choose a local sprite to validate it without uploading.
Install & restore

Different systems, one honest workflow.

macOS

Studio workflow

Install, start, customize from Finder, verify, and restore with dedicated launchers.

macOS guide
Windows

Script workflow

Install, start, verify, and restore with PowerShell and loopback-only CDP.

Windows guide
No engine

Native appearance

Use official Codex appearance settings when you only need colors and fonts.

Compare options
Common questions

Know which layer you are trusting.

Decoration, data, and executable behavior should never be bundled into one vague promise.

Can CodexSkin upload my background image?+

No. Image decoding, preview, and recipe packaging happen in your browser. CodexSkin does not need an image-upload API.

Does the exported recipe install itself?+

No. It is a reviewable archive of data files. Installation uses the separate open-source Codex Dream Skin engine, which you should inspect before running.

Does this modify the official Codex app?+

The upstream engine applies a local theme through loopback-only CDP and does not replace the official app bundle, app.asar, or code signature.

Can I use any image as a Codex background?+

Technically, yes, but only publish or sell a theme when you own the image or have permission to use it.

Start with one image

Make the first surprise useful enough to keep.

Build a readable Codex custom theme, export it, and keep the restore path close.

Start in the studio