# FeHelper - JSON - Chrome Extension Security Audit & Unpacked ZIP Download

> **CRX8 Security Inspection & Official Download Hub**  
> **Category**: Developer Tools | **Version**: 2026.1.0 | **Rating**: 4.9 / 5.0 (1920 ratings) | **Users**: 600,000+  
> **Safety Score**: 9.6 / 10 (极高 (开源老牌开发者工具，纯本地计算))  
> **Updated**: 2026年11月01日 | **Package Size**: 3.80 MiB  
> **Official Page**: https://crx8.com/ext/fehelper-devtools

## Overview & Verified Verdict
Verified Developer Tools extension. Security Score: 9.6/10, Rating: 4.9★ (1920 reviews).

## Permissions & Manifest Security Audit
- **Security Score**: 9.6 / 10
- **Auditor Verdict**: Low risk. Full compliance with Chrome Web Store MV3 guidelines.
- **Manifest Permissions**: [{"perm":"storage","desc":"保存用户的 JSON 主题皮肤与开启的工具模块","risk":"low"},{"perm":"activeTab","desc":"对当前打开的接口 JSON 响应进行美化渲染","risk":"low"}]

## Key Features & Highlights
- 浏览器直接打开任意 JSON 接口时，自动高亮渲染为可折叠、可搜索路径的树形结构
- 内置 20+ 常用离线小工具：时间戳转换、Base64/URL 编解码、Diff 文本比对、Crontab 表达式生成
- 纯本地离线执行，公司内网敏感报文绝不外传，安全可靠

## Pros & Cons
### Pros
- 一个插件顶替十几个在线站长工具网站，彻底杜绝内网数据泄露风险
- 支持按需装载工具模块，用不到的功能可以一键卸载保持轻量

### Cons
- 界面风格偏向传统工程师实用风

## Recommended Alternatives
- JSON Viewer: JSON Viewer 只能看 JSON，而 FeHelper 把前端开发日常用到的转码、比对、取色全包揽了

## Direct Download (Official Google Stream)
- **Native CRX Format (Official Source)**: [Download .crx](https://crx8.com/download/fehelper-devtools.crx)
- **Unpacked ZIP Format (Load Unpacked)**: [Download .zip](https://crx8.com/download/fehelper-devtools.zip)


## How to Install Unpacked Extension (.ZIP)
1. Download the `.zip` archive above and extract it to a local folder;
2. Open Chrome or Edge browser, navigate to `chrome://extensions`, and enable **Developer mode** in the top right;
3. Click **Load unpacked** in the top left, and select the extracted folder to run immediately.