According to AlphaMoat, as of 2026-09, the Chrome extension Codex Chrome Extension has 4,000 users (+100% MoM), rated 5 (1 reviews) — ranked #809 of 9,324 AI browser extensions, and #181 of 2,418 in General AI.
What is Codex Chrome Extension
Free Codex & ChatGPT prompt pane: coding templates, personal snippets, hotkeys & quick site links beside every chat. Codex Chrome Extension — Prompt Pane for ChatGPT puts a free developer-focused side pane next to ChatGPT and Codex so you stop retyping the same coding instructions.
If you live in ChatGPT for code review, debugging, PR writeups, or Codex agent tasks, this extension keeps a prompt library, your own saved snippets, and a hotkey cheatsheet one click away — without leaving the page.
WHY INSTALL
- Open a prompt pane beside ChatGPT or Codex (toolbar icon or composer button)
- Insert battle-tested coding prompts in one tap
- Save personal snippets you reuse every day
- Look up ChatGPT and Codex hotkeys without googling
- Jump to ChatGPT, Codex, OpenAI, Sora, and the API platform from Sites
INSIDE THE PANE
1) Library Ready-made packs: ship code, debug, architecture, writing, and Codex-style agent tasks. Filter with search. Click → copy + paste into the active chat input.
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2) Mine Your private prompt stash. Add long instructions once, reuse forever. Delete anytime. Everything stays in local browser storage on your device.
3) Keys Keyboard map for ChatGPT navigation, composer, Codex run/cancel, and common browser reloads — a living cheatsheet while you work.
4) Sites One-tap links to the tools you already use so the pane doubles as a lightweight launcher.
BUILT FOR
- Software engineers shipping with ChatGPT and Codex
- People running multi-step agent / coding tasks
- Prompt builders who want a personal snippet vault
- Students and indie hackers who want speed without another SaaS login
FREE · LOCAL · LIGHT
No account. No subscription. No chat scraping for ads. Theme preference and saved prompts stay on your machine.
30-SECOND SETUP
1. Install Codex Chrome Extension — Prompt Pane for ChatGPT 2. Open chatgpt.com (or Codex) 3. Click the extension icon — or the panel control next to the composer 4. Pick Library, Mine, Keys, or Sites
SUPPORTED SURFACES
- ChatGPT (chatgpt.com / chat.com)
- Codex workflows on the web
- OpenAI.com
- Sora
- OpenAI Labs
Extension profile
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.