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Privacy & Data Usage

Last updated: 2026-07-09 · View changelog

Our commitment

Chang Yanwei Office Knowledge collects zero data by default. We don\'t need any of your personal information. All tools run locally in your browser. No signup, no email, no cookie banners. Your input (passwords, JSON, files) never leaves your device.

🚫 No upload🚫 No signup🚫 No tracking🚫 No cookies🚫 No ads🚫 No QR codes

What we don\'t do

No upload of your input: tool inputs (JSON, passwords, hash text, files) are processed in your browser and never sent to any server
No identity collection: no signup, no email, no name, no phone number
No cookies: not for sessions, not for ad tracking, not for personalization
No third-party analytics: no Google Analytics, no Baidu Tongji, no analytics at all
No third-party fonts: no Google Fonts, we use your system\'s native fonts
No ads: we don\'t accept any form of advertising
No marketing emails: we don\'t collect emails, so we never send any

What we store (only this)

We only store 3 preference keys in your browser\'s localStorage (to remember your settings):

Key	Value	Purpose
`vbanet-theme`	`dev` / `pub`	Your selected theme
`vbanet-mode`	`light` / `dark` / `auto`	Light/dark mode preference
`vbanet-lang`	`zh-CN` / `en-US`	Language preference

You can clear our localStorage anytime in your browser settings. All preferences reset to default, and no tool functionality is affected.

Third-party services (currently 0)

We currently do not integrate any third-party services (analytics, fonts, ads, monitoring). The only external resources are:

CDN 加速:Cloudflare(海外站) / 阿里云 CDN(国内站,备案后),仅代理静态文件(HTML / CSS / JS / 图片),不接触您的输入数据
托管:Vercel(海外) / 阿里云 ECS(国内),仅提供静态站点托管,无后端业务逻辑、无数据库

Future integrations

If we ever need to add analytics or monitoring, we commit to:

Self-host first: use self-hosted Umami / Plausible, data stays on our servers
Minimal fields: collect only page views, no IP / UA / Referer that can identify you
User control: provide an opt-out option
Public disclosure: update this page FIRST, then enable
Cookie-free: no cookies, stays under the GDPR "no consent needed" threshold

Anonymous visit analytics (for popular ranking)

This site records "tool visited" events to power the homepage popular-tools ranking. **Only date + slug + count are stored**. No IP / UA / Referer / Cookie is collected. Data is used solely for in-site ranking and is never shared.

Server-side SQLite database (data/usage.db), auto-cleaned after 90 days.

Regional compliance

Regulation	Region	Status
GDPR	欧盟	✅ Compliant by default
PIPL(个人信息保护法)	中国	✅ Compliant by default
CCPA / CPRA	美国加州	✅ Compliant by default
LGPD	巴西	✅ Compliant by default
APPI	日本	✅ Compliant by default
PDPA	东南亚	✅ Compliant by default

Data flow

您(浏览器)
  ├─ 输入框(JSON / 密码 / 文件)
  │    ↓
  ├─ 浏览器内 JS 处理(Web Crypto / Canvas / WASM)
  │    ↓
  └─ 结果显示给您(从未离开浏览器)

您的 localStorage
  └─ 仅 3 个偏好键(主题 / 模式 / 语言)

本站服务器(Vercel / 阿里云)
  └─ 仅代理静态文件,不接触您的数据

Questions

📮 Email: cynixway@vba.net (reply within 72 hours)