Online tools are very useful as it makes our life more easier when accomplishing a project. Few of the tools that I just collected overtime are located in this page. If you find some useful tools that you think is worth keeping here, please email me at archer@vallesfin.net.
SVG Editor and Optimization
http://petercollingridge.appspot.com/svg-editor
Image Optimization Tools
https://compressor.io/compress or https://kraken.io/web-interface
and another image compressor that allows you compress up to 50MB of image is https://www.websiteplanet.com/webtools/imagecompressor
Encryption / Decryption
Programming Playground
PHP - https://phpsandbox.io/
JavaScript - https://playcode.io/javascript