> For the complete documentation index, see [llms.txt](https://fusionauth.io/docs/llms.txt)

# Developer Tools

Explore developer tools designed to simplify CIAM development.

[JWT Encoder/Decoder JWT Encoder/Decoder Learn how JWT refresh tokens work and how to use them to authenticate and authorize your APIs.](https://fusionauth.io/docs/dev-tools/jwt-decoder.md)

[Base64 Encoder/Decoder Base64 Encoder/Decoder Convert text to Base64 or decode Base64-encoded data for secure encoding and transmission.](https://fusionauth.io/docs/dev-tools/base64-encoder-decoder.md)

[URL Encoder/Decoder URL Encoder/Decoder Convert special characters for safe transmission as URL parameters and decode encoded URLs.](https://fusionauth.io/docs/dev-tools/url-encoder-decoder.md)

[UUID Generator UUID Generator Create random 32-character unique identifiers for secure and standardized identification.](https://fusionauth.io/docs/dev-tools/uuid-generator.md)

[Unix/Epoch Time Converter Unix/Epoch Time Converter Convert Unix and epoch times using our online time converter tool.](https://fusionauth.io/docs/dev-tools/date-time.md)