Software That Benefits.
Free tools, apps & tutorials — built for the community, not for profit.
No ads.
No login.
No BS.
// free tools
Tools that just work.
No signup. No ads. Open it, use it, done.
JSON Formatter
Paste messy JSON. Get clean, validated, formatted output instantly.
"name": "STB",
"free": true,
"ads": false
}
Base64 Encoder
Encode & decode strings instantly.
JWT Decoder
Inspect any token payload.
Color Converter
HEX · RGB · HSL · live preview.
Regex Tester
Test patterns live with highlights.
// about stb
Built different. For real.
No VC funding. No ads. No premium plans. Just a developer who believes good tools and knowledge should be free — for everyone, always.
Our Story →Independent Dev
No client work. Just passion projects built to help people learn and grow.
Learning First
Everything focused on education. Share knowledge, build together, grow together.
100% Free Forever
Every tool, every app, every tutorial. No paywalls. No trials. Ever.
// android apps
Shipped to Play Store.
Smart Calculator
Basic calculator (add, subtract, multiply, divide). GST calculator for tax calculations.
View on Play Store →The first electronic calculator was built in 1961 and weighed 25kg. Your phone does the same in microseconds!
MACETIANS
AKU new syllabus for all branches & semesters. Notes for all subjects.
View on Play Store →MACET Patna was established in 2001. This app makes student life easier — one download away from everything you need!
// connect