Can I give ChatGPT a Halloween theme?

Yes. Install ChatTheme and choose Haunted Halloween on ChatGPT, Claude or Gemini. The theme is built in and free.

Does the pumpkin really send a message?

Yes. Clicking the jack-o’-lantern forwards the action to the site's own send control. If your draft is empty, it focuses the message box. The normal send button and keyboard shortcuts remain available.

Does Haunted Halloween have a light version?

Yes. Its light palette uses parchment, burnt orange and dark plum, with a foggy afternoon sky around the same illustrated house. Choose Light, Dark or System in Customize.

How do I use the Haunted Halloween theme?

Install ChatTheme from the Chrome Web Store, open chatgpt.com, claude.ai or gemini.google.com, click the ChatTheme icon in the toolbar to open the side panel, and click Haunted Halloween. It applies instantly, without reloading the page.

Does the Haunted Halloween theme break any ChatGPT, Claude or Gemini features?

No. ChatTheme only changes colours, fonts, shapes and adds decoration around the app. Uploads, voice, canvas, projects, menus and shortcuts work exactly as before, and Alt+Shift+T switches every theme off instantly.

Is the Haunted Halloween theme free?

Yes. Every built-in theme is free.

Halloween

A haunted Halloween theme for ChatGPT, Claude and Gemini

Step into the midnight parlour: crooked roof shingles, fine cobwebs, parchment letters and a jack-o’-lantern that sends your message.

Add to Chrome — it's free

Free · chatgpt.com, claude.ai and gemini.google.com · Off in one key with Alt+Shift+T

ChatGPT with the Haunted Halloween theme by ChatTheme

The Haunted Halloween look

Haunted Halloween turns your chat into the window of an illustrated haunted house. Bats cross a cratered moon, a candle lights the attic, and a gnarled tree stands beside a tiny graveyard. Every detail is original inline SVG artwork bundled with the theme.

Inside, serif text sits on aged parchment, your messages glow pumpkin orange, and code gets a cauldron-green panel with typewriter lettering. The hand-made light palette changes the scene to a foggy October afternoon. Only the look changes; your conversations and the site's own controls keep working.

Crooked timber frame with individual roof shingles and shuttered attic window
Membraned bat wings, delicate cobwebs and a softly glowing cratered moon
Ribbed jack-o’-lantern that forwards clicks to the site's send button
Parchment replies, pumpkin bubbles and green code panels
Moonlit dark mode and a hand-made foggy afternoon light mode
Original artwork and bundled Courier Prime; no remote images or fonts

What changes

Base: Dark
Font: Serif
Code font: Courier Prime typewriter
Corners: 8px radius
Frame: custom
Effects: None
Palette

Nothing is hidden, moved or covered. Frames are decoration around the app and never sit over the input, menus or send button.

Haunted Halloween on ChatGPT, Claude and Gemini

One theme, every app. Pick it once and it follows you across chatgpt.com, claude.ai and gemini.google.com.

chatgpt.com

claude.ai

How to use the Haunted Halloween theme

1
Install ChatTheme
Add the free ChatTheme extension to Chrome, Edge, Brave or Arc from the Chrome Web Store.
2
Open ChatGPT, Claude or Gemini
Go to chatgpt.com, claude.ai or gemini.google.com and click the ChatTheme icon in the toolbar to open the side panel.
3
Pick Haunted Halloween
Click Haunted Halloween in the Themes tab. It applies instantly without reloading. Press Alt+Shift+T any time to switch back to the stock look.

Want a variation? Open the Create tab and type something like “Haunted Halloween but pink” or “add stickers”. AI edits the theme live and you can undo any step.

Haunted Halloween theme FAQ

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