Tools you constantly need during development but hate searching for every time — solve it all in one place. Here are 10 essential IT calculators for everyday developer tasks, from formatting JSON to decoding JWTs.
📑 Table of Contents
1. Data Conversion Tools
The most frequently needed tools for API development, debugging, and data transfer.
1
JSON Formatter
Pretty-print or minify JSON. Also validates syntax and highlights errors instantly.
Pretty-print or minify JSON. Also validates syntax and highlights errors instantly.
2
Base64 Encoder/Decoder
Encode or decode images, auth tokens, and binary data. Essential for Data URIs and API auth headers.
Encode or decode images, auth tokens, and binary data. Essential for Data URIs and API auth headers.
3
URL Encoder/Decoder
Safely encode URL parameters with special characters and decode percent-encoded strings back to readable form.
Safely encode URL parameters with special characters and decode percent-encoded strings back to readable form.
2. Security Tools
Password hashing, data integrity checks, and token-based authentication are core to any modern service.
4
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes at once. Useful for file integrity checks and checksum comparisons.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes at once. Useful for file integrity checks and checksum comparisons.
5
JWT Decoder
Decode JWT tokens to inspect Header, Payload, and Signature. Check expiration, issuer, and custom claims instantly.
Decode JWT tokens to inspect Header, Payload, and Signature. Check expiration, issuer, and custom claims instantly.
3. Frontend Tools
Essential tools for converting CSS units and color formats during UI development.
6
CSS Unit Converter
Convert between px, rem, em, vw, and vh. Perfect for responsive design workflows.
Convert between px, rem, em, vw, and vh. Perfect for responsive design workflows.
7
Color Converter
Convert between HEX, RGB, RGBA, HSL, and HSV color formats. Great for translating Figma colors to code.
Convert between HEX, RGB, RGBA, HSL, and HSV color formats. Great for translating Figma colors to code.