$ open toolkit.app
Aldo's Toolkit
> dev · sec · learn
On-device dev + security utilities, Sec+ / eJPT cert prep, four games, and a markdown notebook. Free. No ads. No tracking. Sign in to sync across devices.
// dev + security tools
- Password strength meter (zxcvbn)
- Hash generator — SHA-1/256/512 + MD5
- Base64 encode/decode
- JWT decoder
- UUID v4 generator
- JSON formatter + validator
- Color converter (hex / rgb / hsl)
// cert prep
- Sec+ SY0-701 + eJPT flashcards
- Multi-choice quiz with score
- Daily question with streak tracking
- Searchable command reference (nmap, hashcat, smb, …)
// games
- 2048
- Snake
- Caesar Cipher puzzle
- Hex Memory
// productivity
- Markdown notes with live preview
- Regex tester with match highlighting
- Pomodoro timer with notifications
- Snippet library (git, ssh, curl, docker…)
// privacy
The toolkit is local-first. Your notes, snippets, and progress live on your device. If you sign in (with the same account that works on this site), the app backs up your data to your private Supabase row. We don't run analytics, ads, or any third-party trackers. You can delete your account from inside the app at any time.
See the full privacy policy and terms.
// follow along
New tools, cert-prep notes, and v1.x release news land on social first.
// built with
expo sdk 54 · expo-router · react native 0.81 · nativewind · supabase · typescript · zxcvbn · expo-crypto