自己有服务器资源的话可以顺便部署下这两个开源项目，自用引流皆可：
1）Stirling-PDF：Locally hosted web application that allows you to perform various operations on PDF files. （ https://github.com/Stirling-Tools/Stirling-PDF ）
2）it-tools：Collection of handy online tools for developers, with great UX. （ https://github.com/CorentinTh/it-tools ）