The Ultimate Online
Developer & Finance Toolkit
118+ powerful tools that run entirely in your browser. No sign-up, no server uploads, completely free and privacy-first.
Browse by Category
Financial Calculators
EMI, SIP, GST, Tax & Global Loans
6 tools →Developer Tools
JSON, Regex, JWT, Hash & more
95 tools →Date & Time
Age, timezone, timestamp tools
2 tools →Math & General
Percentage, discount, unit converters
1 tools →Image Tools
Compress, resize, convert images
4 tools →Java / Spring Boot
Stack trace, Maven, JVM tools
2 tools →Kubernetes / DevOps
YAML generators, Docker tools
3 tools →Regional Utilities
Pincode, IFSC, PAN & Local Checkers
4 tools →🔥 Popular Tools
JSON Formatter
Format, validate, and minify JSON data online with syntax highlighting and error detection
Base64 Encoder/Decoder
Encode and decode text to/from Base64 format instantly
JWT Decoder
Decode and inspect JWT tokens locally — view header, payload, and verify expiration
Regex Tester
Test and debug regular expressions with real-time matching, highlighting, and group capture
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input
UUID Generator
Generate random UUID v4 identifiers. Bulk generate and copy instantly
EMI Calculator
Calculate monthly EMI for home, car, and personal loans with detailed amortization schedule
SIP Calculator
Estimate returns on your Systematic Investment Plan with step-up SIP and wealth gain analysis
GST Calculator
Add or remove GST at 5%, 12%, 18%, or 28% rates. Calculate CGST, SGST, and IGST breakdowns
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birth
Percentage Calculator
Calculate percentage of a number, percentage increase/decrease, and find what percent X is of Y
🔒 Privacy First — All tools process data entirely in your browser. Nothing is uploaded to any server. Your data stays yours.