Customize ChatGPT

Name: Customize ChatGPT
Author: fumi-nozawa.space

fumi-nozawa.space · Tools

Open in Chrome Web Store Website

Users

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Ratings

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Updated

Jul 25, 2026

Media

1 item

Description

A Chrome extension to customize and inject prompts, roles, and guardrails (negative prompts) into ChatGPT. Define custom roles — each with its own system prompt and guardrails — and switch between them instantly from your browser toolbar while you chat. ChatGPT's built-in Custom Instructions only let you set one context at a time. Changing it means digging through settings and rewriting everything. This extension puts role switching one click away, making it far more intuitive for anyone who uses ChatGPT across different tasks or contexts. Each role lets you set what ChatGPT should do and what it should avoid. Pick a role, start chatting, switch anytime. Your saved roles stay ready whenever you need them.

History

30d 90d 1y all

rating_count is the Chrome Web Store ratings count, not a written-review count.

Details & SEO

SEO signals

Listing completeness signals

Title length
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17
Description length
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717
Media assets
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1
Has promo video
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No
Languages
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1
Developer website
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Yes
Contact email
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Yes
Keyword in name
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Keyword in description
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Keyword occurrences in description
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Category user-count percentile
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These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.