> sys.identity // 51.51°N, 0.13°W

Giuseppe
Giona.dev

Mathematician turned engineer. I build

byte-level PDF processors

View latest project LinkedIn

lines.ts

tests.pass

tools+plugins

projects

02 / Projects

Shipped work

Open source. Source code and tests included.

Web Appupdated Mar 2026

PDF Changer

21 browser-only PDF tools with a verified processing environment that produces cryptographic proof nothing leaked. Passkey auth, offline entitlements, printer tracking dot decoder.

21tools

299tests

29klines

ReactCloudflare WorkersWebAuthnpdf-libWeb Crypto

live at pdfchanger.org

Security Toolupdated Mar 2026

threadr

OSINT tool for security professionals. 17 plugins, 5 analytics engines (Dempster-Shafer, spectral clustering, Katz centrality), 7-layer anonymity system with Lévy flight timing and k-anonymity decoys, zero-knowledge ECDSA accounts.

17plugins

141tests

5analytics

ReactNeo4jHonoBullMQTypeScript

live at github.com/Giuseppe552/threadr

More projects in progress

GiuseppeGiona.dev

Shipped work

PDF Changer

threadr

Giuseppe
Giona.dev