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Custom Themes for ChatGPT, Claude & Gemini - ChatTheme

Chrome extension by Eric strohmaier · Make Chrome Yours · Functionality

  • Established publisher

A Chrome extension in Make Chrome Yours · Functionality with 26 users, barely installed.

Specific sites only: 6 match patterns.

What the developer says, and 4 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
26
Rating
5.0 (3 ratings)
Users, last 13 days
+26
Rating, last 30 days
Not watched long enough to say
Version
2.0.12
Updated in the store
2026-10-30
Published
2026-10-18
Manifest
V3
Browser access
5 permissions, 6 site patterns

How it has moved

Users
+26 since 19.10
0-28 · 12 readings
2026-10-19: appeared in the store2026-10-21: released 2.0.02026-10-23: released 2.0.12026-10-23: gained the good publisher record badge2026-10-24: released 2.0.32026-10-30: released 2.0.12
  1. 2026-10-190appeared in the store
  2. 2026-10-203
  3. 2026-10-216released 2.0.0
  4. 2026-10-2211
  5. 2026-10-2313released 2.0.1gained the good publisher record badge
  6. 2026-10-2416released 2.0.3
  7. 2026-10-2520
  8. 2026-10-2621
  9. 2026-10-2826
  10. 2026-10-2928
  11. 2026-10-3026released 2.0.12
  12. 2026-10-3126
Rating
+5.00 since 19.10
reviewsrating 0.00-5.00 · 12 readings
2026-10-19: appeared in the store2026-10-21: released 2.0.02026-10-23: released 2.0.12026-10-23: gained the good publisher record badge2026-10-24: released 2.0.32026-10-30: released 2.0.12
  1. 2026-10-19reviews0rating0.00appeared in the store
  2. 2026-10-20reviews1rating5.00
  3. 2026-10-21reviews2rating5.00released 2.0.0
  4. 2026-10-22reviews2rating5.00
  5. 2026-10-23reviews2rating5.00released 2.0.1gained the good publisher record badge
  6. 2026-10-24reviews2rating5.00released 2.0.3
  7. 2026-10-25reviews2rating5.00
  8. 2026-10-26reviews2rating5.00
  9. 2026-10-28reviews3rating5.00
  10. 2026-10-29reviews3rating5.00
  11. 2026-10-30reviews3rating5.00released 2.0.12
  12. 2026-10-31reviews3rating5.00
Users
+26 since 19.10
0-28 · 12 readings
2026-10-19: appeared in the store2026-10-21: released 2.0.02026-10-23: released 2.0.12026-10-23: gained the good publisher record badge2026-10-24: released 2.0.32026-10-30: released 2.0.12
  1. 2026-10-190appeared in the store
  2. 2026-10-203
  3. 2026-10-216released 2.0.0
  4. 2026-10-2211
  5. 2026-10-2313released 2.0.1gained the good publisher record badge
  6. 2026-10-2416released 2.0.3
  7. 2026-10-2520
  8. 2026-10-2621
  9. 2026-10-2826
  10. 2026-10-2928
  11. 2026-10-3026released 2.0.12
  12. 2026-10-3126
Rating
+5.00 since 19.10
reviewsrating 0.00-5.00 · 12 readings
2026-10-19: appeared in the store2026-10-21: released 2.0.02026-10-23: released 2.0.12026-10-23: gained the good publisher record badge2026-10-24: released 2.0.32026-10-30: released 2.0.12
  1. 2026-10-19reviews0rating0.00appeared in the store
  2. 2026-10-20reviews1rating5.00
  3. 2026-10-21reviews2rating5.00released 2.0.0
  4. 2026-10-22reviews2rating5.00
  5. 2026-10-23reviews2rating5.00released 2.0.1gained the good publisher record badge
  6. 2026-10-24reviews2rating5.00released 2.0.3
  7. 2026-10-25reviews2rating5.00
  8. 2026-10-26reviews2rating5.00
  9. 2026-10-28reviews3rating5.00
  10. 2026-10-29reviews3rating5.00
  11. 2026-10-30reviews3rating5.00released 2.0.12
  12. 2026-10-31reviews3rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 6 match patterns.

  • https://chatgpt.com/*
  • https://chat.openai.com/*
  • https://claude.ai/*
Show the remaining 3
  • https://gemini.google.com/*
  • https://chattheme.vercel.app/*
  • https://*.chromiumapp.org/*
  • Run its own code on the pages it can access scripting
  • Schedule work to run later alarms
  • Open a panel beside the page sidePanel
Show the remaining 2

The full permission history for this extension

Version history

  1. Version 2.0.12
  2. Version 2.0.3
  3. Version 2.0.1
Show the remaining 1
  1. Version 2.0.0 · Asked for more permissions (11, was 10) (changed: browser permissions)

What changed recently

  1. Package size changed
  2. Released version 2.0.12 (was 2.0.3)
  3. Package size changed
Show the remaining 9
  1. Released version 2.0.3 (was 2.0.1)
  2. Store description rewritten (124 → 122 characters)
  3. Gained the Established publisher badge
  4. Renamed from "ChatTheme – Retro & AI Themes for ChatGPT and Claude" to "Custom Themes for ChatGPT, Claude & Gemini - ChatTheme"
  5. Released version 2.0.1 (was 2.0.0)
  6. Package size changed
  7. Asked for more permissions (11, was 10) (changed: browser permissions)
  8. Released version 2.0.0 (was 0.1.0)
  9. Appeared in the store

The publisher

Eric strohmaier publishes 2 listings we track, 9k users between them. Listed website: chattheme.vercel.app.

  1. AI Prompt Helper for ChatGPT & Claude - PromptSloth Eric strohmaier · Productivity · Workflow · published 2025-06-21 9k users ★ 4.8

Like this one

Listings the catalog judges closest in what they say they do.

  1. Pretty Reply Describes nearly the same job, smaller audience 6 users
  2. ChatGPT Themes Describes nearly the same job, smaller audience 167 users ★ 5.0
  3. Ultimate Customization for AI: CHATPGPT, CLAUDE, GEMINI and more Describes nearly the same job, smaller audience 19 users
  4. Custom Themes for ChatGPT, Claude & Gemini – Colors & UI Styles Describes nearly the same job, smaller audience 70 users ★ 5.0
  5. Chameleon — AI Chat Customizer Describes nearly the same job, smaller audience 3 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Users and rating on Ext Ops Panel

Markdown

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HTML

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Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-30. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built