Stable signalNo paid features detectedHigh-risk permissions

Codex Dev

Developer's Insight Tool - View your website in multiple responsive screen sizes simultaneously with synchronized scrolling.

Users2KCurrent public install base

Rating5.0Store average score

Reviews2Public review volume

Manifest versionV3Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

Codex Dev Media preview

4 assets

Trend

30-day user trend

Review user movement over the last 30 days.

User Growth Over Time

Rating trend

30-day rating change

Track rating movement over time to see whether quality signals remain stable.

30-day rating change

Start

5.00

Latest

5.00

30-day rating change

0.00

2026年6月13日2026年6月19日

Growth overview

Daily, weekly, and monthly growth

Compare 1-day, 7-day, and 30-day net growth and growth rate.

1-day growthFlat

00%

7-day growthFlat

00%

30-day growthGrowing

+1.4K+212%

Technical snapshot

Version, languages, and crawl freshness

Review publication date, version, supported languages, and crawl timestamps.

Version1.2.0

ManifestV3

Size1.86MiB

Languages1English

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

🚀 Codex Dev – Responsive Testing, Live Editing & Asset Extraction

Codex Dev is an all-in-one developer toolkit that combines responsive testing, live HTML/CSS editing, and asset extraction in a single powerful interface.

🔥 What You Can Do

🖥 Test Multiple Devices Side-by-Side

View any website across mobile, tablet, and desktop breakpoints simultaneously.

✏ Live Edit HTML, CSS & Media Queries

Reviews

Recent review snapshot

Inspect the latest comments and rating distribution.

The Chrome Web Store shows 2 reviews, but only 0 review bodies have synced into ExtScope so far. Showing the synced reviews available right now.

5★

4★

3★

2★

1★

Similar and related extensions

Review related products from the Chrome Web Store detail page.

Responsive Viewer

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Show multiple screens once, Responsive design tester

Pixefy - Responsive Design Checker

Developer Tools

Preview and debug your website’s responsiveness across multiple devices in real-time, all inside one browser tab.

Window Resizer

Developer Tools

Resize browser windows to test layouts on different resolutions with multi-window support.

Mobile View: Test responsive designs fast

Developer Tools

Test your responsive designs on multiple devices at once.

AI product read

Responsive design testing and visual web editing

Allows developers to test how websites look across multiple device screen sizes simultaneously in a single tab, and visually edit HTML/CSS in real-time without leaving the browser.

User navigates to a website -> Clicks extension icon -> Selects device presets or custom sizes -> Viewer opens in new tab with synchronized iframes -> User can edit styles or extract assets locally.

Target users: Frontend developers / UI/UX designers / QA engineers

Analysis based on static source code and store listing; runtime behavior of the 'smart hybrid approach' (iframe vs popup) was inferred but not fully traced in dynamic execution.

Monetization

No paid features detected

The extension is explicitly described as 'Completely Free & Open Source' (STORE_LISTING.md line 72, README.md line 133). The keyword 'premium' found in the code (e.g., STORE_LISTING.md line 43 'Premium Interface', README.md line 42 'Premium UI') refers to the visual design quality (dark mode, glassmorphism), not a paid tier. There are no billing APIs, license checks, or feature gates in the source code.

Confidence: 95
Payment platform: --
Source: AI / High
Login required: No
Reason: The extension explicitly states 'No Account Required' in PRIVACY.md (line 73) and 'Completely Free & Open Source' in the store description. The code in popup.js and viewer.js performs local operations (iframe injection, UA spoofing, CSS editing) without any authentication flow, token handling, or redirect to a login page. The deterministic heuristic's 'account required' signal was a false positive from the phrase 'No Account Required' in the privacy text.

Permission risk

High-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

敏感权限：declarativeNetRequestWithHostAccess
扩展能力较强：activeTab、tabs、storage、scripting
主机权限覆盖范围较宽

Publisher

Independent publisher

Email: [email protected]
Phone: --
Address: --

Public contact fields are shown above. Developer portfolio pages are available on paid accounts.

View developer portfolio

Permissions

Host access