How WebAssembly became our privacy architecture (not just a performance trick)

说明与用途

该 Web 应用使用 WebAssembly 在浏览器端完全处理 PDF 和图像，消除了文件上传，提升了隐私保护。流程包括读取文件到内存、在 Wasm 模块中处理、生成 Blob、触发本地下载并清理资源，从而实现零基础设施成本、离线功能和无速率限制。

问题

Users uploading sensitive PDFs to online services expose files to servers that may retain them for hours, creating privacy risks.

结果

Client‑side Wasm processing eliminates file uploads, provides zero infrastructure cost, offline support, and no rate limits, while maintaining full functionality for PDF and image manipulation.

工作流

• Read file into ArrayBuffer locally
• Pass ArrayBuffer to a Wasm module for processing
• Create a Blob from the result
• Generate a local object URL
• Trigger a download from the URL
• Revoke the object URL to clean up

证据

Wasm modules cannot initiate network connections.

来源

Any user can verify this in 60 seconds by inspecting the Network tab.

来源