Free Online Developer Utilities
Essential client-side developer tools for encoding, decoding, formatting JSON data, and generating QR codes securely.
Encoding & Formatting Utilities
Fast, secure utilities for web developers and programmers.
URL Encoder / Decoder
RFC 3986Encode or decode URLs and inspect query parameters.
Hash Generator (MD5 / SHA)
ChecksumGenerate MD5, SHA-256 and verify file checksums.
Base64 Encoder / Decoder
Encode or decode text and binary data into Base64 format.
JSON Formatter & Validator
PopularFormat, beautify, minify, and validate JSON data.
QR Code Generator
Custom QRCreate customizable QR codes for URLs, WiFi, and text.
Most Popular Free Developer Tools
Frequently Asked Questions (FAQ)
Is my JSON data sent to any backend server?▼
No! All JSON formatting and Base64 operations happen strictly in your browser memory.
Step-by-Step Guides & Helpful Tutorials
How to Calculate Home & Car Loan EMI Accurately
Principal reduction, interest amortizations, and early payoff strategies.
Calculate Exact Age for Competitive Exam Eligibility
Check age cut-off dates for civil services and state recruitment portals.
JPEG vs PNG for Online Applications: Which to Pick
Compare compression efficiency and compatibility for web uploads.
Photo Dimensions vs File Size Explained
Understand DPI, pixel dimensions, and compression artifacts.