TextCompare is a free diff checker tool that supports text, spreadsheet, image and PDF comparison.
TextCompare can also check readability of text for various grade levels using scores such as Automated Readability Index, Coleman-Liau, Flesch-Kincaid Grade, Gunning-Fog, New Dale-Chall and more.
It also supports converting and manipulating formats such as CSV, JSON, HTML, XML, YAML etc.
Other utilities include text utilities such as
Add Prefix or Suffix
Remove Line Breaks & Spaces
Flip & Reverse Text
String Builder
Encode HTML
Decode HTML
Encode Base64
Decode Base64
Encode URL
Decode URL
String to Hex
Hex to String
String to Binary