You only have to create an account if you want to upgrade to DevToolbox Pro which saves your history so you can keep track of all the actions you have done.
ASCII Converter
Base64 Encoder
Base64 Image Encoder
CSS Unit Converter
Character/Word Counter
Clipboard Formatter
Color Converter
Diff Viewer
Hash Generator
JSON Validator
JWT Viewer
Line Sort And Dedupe
Markdown Editor
QRCode Generator
Regex Checker
String Converter
UUID Generator
Unix Time Converter
Url Decoder
Url Encoder
Url Parser
UUIDv4