privacy webdevEvery time I uploaded a file to an online PDF tool, I wondered: what happens to it after?

Some services delete files after 2 hours. Some after 24. Some never specify. None let you verify.

So I rebuilt the tools locally. All 108 of them.

## How it works

**[EveryTool4U](https://everytool4u.com)** uses WebAssembly libraries running entirely in your browser: - **pdf-lib** — merge, split, compress, sign, rotate PDFs - **Tesseract.js** — OCR in WASM locally - **FFmpeg.wasm** — video to GIF conversion - **@imgly/background-removal** — runs a local AI model in browser

Your file never touches a network request. Open DevTools → Network tab and verify: zero bytes leave when you compress a PDF.

## Why it matters 1. HIPAA/GDPR — medical and legal docs stay on device 2. Sensitive business files — contracts, financials, HR data 3. Offline — works after first load 4. Speed — no upload/download round trip

## The tradeoff

Client-side is slower for large files.…