Zero-Leak Developer & Cryptography Sandbox
Clean, deterministic developer utilities designed for privacy-conscious engineers. Test regex, format JSON, decode JWTs, and encrypt secrets without server roundtrips.
Code Diff, JSON & Regex
Side-by-side text and code diff comparison, JSON syntax validator, live regular expression sandbox, and zero-leak JWT token inspector.
Branded Vector QR Code
Generate branded high-resolution vector QR codes with custom logos, Wi-Fi auto-connect cards, vCards, URLs, and multi-format barcodes (EAN-13, Code 128).
Password Vault & Encryption
Client-side AES-256-GCM file and text encryptor, Diceware passphrase generator, SHA-256/512 cryptographic hash lab, and crack-time entropy meter.
What Is My IP & Privacy Audit
Instant public IPv4/IPv6 address lookup, carrier ISP/ASN identification, geographic location, and canvas fingerprint entropy diagnostic.
Internet Speed Test
Test download and upload speeds, millisecond ping latency, jitter, bufferbloat grade, and WebRTC IP shield with zero advertising trackers.