Developer Tools
JSON formatters, encoders, UUID generators, and other utilities for developers.
6 free tools in this category
JSON Formatter
PopularBeautify or minify JSON with clear validation errors.
Developer Tools
JSON Validator
PopularValidate JSON syntax and inspect key counts instantly.
Developer Tools
Base64 Encoder Decoder
PopularEncode and decode Base64 strings with proper UTF-8 support.
Developer Tools
URL Encoder Decoder
Encode and decode URL query strings and path segments safely.
Developer Tools
UUID Generator
PopularGenerate RFC 4122 version 4 UUIDs in bulk, instantly.
Developer Tools
Timestamp Converter
Convert Unix timestamps to dates and back using your local timezone.
Developer Tools
Frequently asked questions
What developer tools are available on UpayaTools?+
UpayaTools currently offers 6 developer tools, including JSON Formatter, JSON Validator, Base64 Encoder Decoder. New tools are added regularly.
Are developer tools free to use?+
Yes. Every tool in this category is free to use in your browser with no signup required.
Do these tools upload my data?+
Most tools process data locally in your browser for privacy and speed. Check each tool page for details.