貼得安心，對得放心。
Privacy-First Contract & Policy Diff Tool | 100% Client-Side Processing | Zero Server Upload
ClauseDiff 安心對 is a privacy-first text comparison web application designed specifically for Confidential Contracts, Policies, and Enterprise Documents. Built with zero external dependencies and enforced by strict Content Security Policy (connect-src 'none'), your sensitive contracts, emails, and internal policy documents are compared directly within your browser’s memory—never uploaded to any server or cloud database.
ClauseDiff 安心對 是一款專為 敏感合約、機密文件與企業政策 打造的極致純前端私隱比對工具。採用零外部依賴與嚴格 Content Security Policy 網絡隔離架構（connect-src 'none'），所有敏感合約、Email 及政策條文完全在您的本機瀏覽器記憶體內運算，絕不上傳至任何伺服器，徹底杜絕商業機密與個人資料外洩風險。
- 🔒 100% Client-Side & Zero Network Transit / 100% 本地純前端運算與零網絡外傳
- Enforced with strict CSP (
connect-src 'none'). All text comparisons run locally in browser RAM with zero API calls and zero database persistence.
透過嚴格 CSP 封鎖所有外部連線，文字比對完全在瀏覽器記憶體內即時完成，零 API 外連、零資料庫留存。
- Enforced with strict CSP (
✈️ True Air-Gapped & Offline PWA / 支援 100% 斷網與飛航模式運算- Zero external CDN dependencies. Fully operable offline, in Flight Mode, or in air-gapped secure enterprise environments.
零外部 CDN 依賴，支援完全斷網、飛航模式或實體隔離（Air-Gapped）環境下獨立運行。
- Zero external CDN dependencies. Fully operable offline, in Flight Mode, or in air-gapped secure enterprise environments.
- 🧠 Built-in Deterministic Myers Diff / 內建確定性 Myers 比對演算法
- Exact word and character-level comparisons without probabilistic LLM hallucinations or data ingestion risks.
採用精確的確定性字詞比對演算法，完全排除生成式 AI 的幻覺與模型訓練洩密風險。
- Exact word and character-level comparisons without probabilistic LLM hallucinations or data ingestion risks.
- 📥 Audit Report Export & Clipboard Copy / 一鍵匯出審計報告與複製
- Export timestamped standalone HTML difference audit reports or copy highlighted outputs with a single click.
支援一鍵匯出具備時間戳記的獨立 HTML 比對審計報告，或快速複製結果至剪貼簿。
- Export timestamped standalone HTML difference audit reports or copy highlighted outputs with a single click.
- 🌐 Declarative Bilingual Interface (i18n) / 聲明式中英文雙語切換
- Seamlessly toggle between Traditional Chinese and English with dynamic PWA manifest localization.
支援繁體中文與英文一鍵即時切換，並具備動態多語言 Manifest 支援。
- Seamlessly toggle between Traditional Chinese and English with dynamic PWA manifest localization.
- 🌓 Dark Mode & WCAG 2.1 AA / 深色模式與無障礙標準
- Automatic dark mode support via
prefers-color-scheme, keyboard shortcuts (Ctrl/Cmd + Enter), and full screen-reader accessibility.
自適應深色模式、快捷鍵比對（Ctrl/Cmd + Enter）並完整支援 WCAG 2.1 AA 無障礙標準。
- Automatic dark mode support via
Designed with strict Privacy by Design & Default principles, ClauseDiff aligns with global cybersecurity, AI governance, and data privacy standards:
本專案在架構設計上嚴格落實 Privacy by Design & Default 原則，全面對齊以下國際資安與數據治理標準：
| Standard / 國際標準 | Architectural Assurance / 合規架構保障 |
|---|---|
| ISO/IEC 27001 (ISMS) | Zero Storage & Air-Gapped Capability: Zero data transit or persistence. Enforced via CSP connect-src 'none'.無數據傳輸與持久化儲存，嚴格 CSP 隔離，徹底封堵資料外洩漏洞。 |
| ISO/IEC 27701 (PIMS) | Data Minimization: Zero PII (Personally Identifiable Information) collection, strictly adhering to GDPR & HK PDPO. 完全不收集 PII 個人資料，符合 GDPR 及香港 PDPO 私隱條例規範。 |
| ISO/IEC 42001 (AIMS) | Governance Safe: Content is processed locally and never ingested or used for third-party AI model training. 輸入內容絕不上傳雲端，保證絕不被用於第三方 AI 模型訓練。 |
| EU AI Act (Art. 14) | Human Oversight: Fully deterministic output with explicit user control and instant memory clearance. 確定性非自主運算，使用者享有 100% 人工控制權與即時記憶體銷毀機制。 |
Comprehensive audit and governance specifications are available in the /docs directory:
- 🛡️ Risk Assessment Report (ISO 42001 & EU AI Act)
- 🔒 Data Governance & Privacy Specification (ISO 27701 & GDPR)
- 👤 Human Oversight & Technical Control Specification
- 🔄 Software Lifecycle Management Policy
- 📋 System & Engine Information Card
- Core Engine: Vanilla JavaScript (ES6+) with Built-in Native Myers Diff Algorithm
- Styling: Pure Modern CSS (Zero external CSS frameworks / Zero CDN dependency)
- PWA & Offline: Service Worker Cache Storage API (
sw.js) - Security Layer: Strict Content Security Policy (CSP Meta Tag)
- Deployment: GitHub Pages (Serverless Static Architecture)
Experience the live app immediately on GitHub Pages without installing anything:
無需安裝任何套件，造訪已部署的線上版本：
Distributed under the MIT License.