Free online tools from Keyzzone
A growing collection of practical, browser-based utilities — invoices, PDFs, image tools, DNS and email checks and more. Every tool runs entirely on this page, so your files and text stay on your device.
Image
Utilities
Base64, URL and HTML Encoder / Decoder
Encode and decode Base64, URL and HTML strings both ways.
JSON ↔ CSV Converter
Convert between JSON, CSV and YAML with a single click.
JSON Formatter and Validator
Pretty-print, minify and validate JSON with clear error messages.
Strong Password Generator
Generate strong, random passwords locally with your browser's crypto.
Text Case and Cleaning Tools
Change case, trim, sort and clean up text without any manual effort.
Word and Character Counter
Count words, characters, sentences and reading time as you type.