A collection of tools.


Capitalize English Title

URL Slug Generator

Markdown (CommonMark) syntax

Table of Contents of Markdown content can be generated using the Markdown All in One Visual Studio Code extension.


URL Decoder

JWT tool

Format JSON

echo '{"name":"John", "age":30, "car":null}' | python3 -mjson.tool

Epoch & Unix Timestamp Conversion


IP Address Lookup

IP Subnet Calculator


Campaign URL Builder for Google Analytics

A tool to build URL containing utm_source, utm_medium, and utm_campaign. (Note that, There parameters will stop working on July 1, 2023. Use Google Analytics 4 property instead. URL builder for GA 4.)