This site was created by a developer that required additional features from data conversion tool.
Convert JSON to Query String and back
The first conversion tool added was the JSON to Query parameter tool. This tool was created as no tool provised the conversion of nested query parameter to JSON. This how ConvertOnline.io was born. Instead of it being a personal tool it became a tool available online so it could be used form anywhere. Sharing is caring.
URL Encoding and decoding with highlighing
Many available tools online provide URL encoding and decoding feature. What was missing, a frendlier tool with syntax highlighting. This need came from the need to analyse link. Raw uncoded/decoded links worked well and did the job. However the ability to see parameters is a gift to appreciate when analysing links. From there syntax higligting became a standard for all the conversion tools.