Developer Tools & Tech Guides
Free online developer tools and practical tech guides — QR codes, JSON, hashing, PowerShell and Raspberry Pi, all running in your browser.
Welcome to techgeek.biz, where you can code, upskill and contribute
Below we have sorted everything into handy catogories for you to get started
Most Popular Tools
QR Code Maker - generate QR codes for links, Wi-Fi, vCards and more
Password Generator - generate strong random passwords with a live strength meter, 100% in your browser
Base64 Encoder & Decoder - convert text and files to/from Base64 with URL-safe variants, Unicode handling and data URIs, 100% in your browser
JSON Formatter & Validator - format, minify and validate JSON with line/column error locations, a tree view and key sorting, 100% in your browser
Unix Timestamp Converter - convert epoch timestamps to UTC and local dates (s/ms/µs/ns auto-detected), with a live clock, date-to-epoch conversion, time differences and a log-line parser, 100% in your browser
WAV to MP3 Converter - convert WAV or any audio to MP3 with adjustable bitrate, 100% in your browser
TTS Engine - turn text into natural speech with the Kokoro-82M AI, 100% in your browser
Color Converter & Palette Generator - convert HEX, RGB, HSL and CMYK, build palettes and check WCAG contrast, 100% in your browser
JWT Decoder & Inspector - decode JSON Web Tokens to inspect headers, claims, expiry times, issuer and signature with a built-in security check, 100% in your browser
Enjoy
