A bookmarklet you can get the form data as json It also save the json data and complete the form instead of you. You can download from https://raw.githubusercontent.com/steelydylan/FormCompleter/master/dist/form-completer.js
Fill in the form as usual Run the bookmarklet Type the form's selector (exp. #form .form form) in the top input element Push the "Get code" button Push the "Save" button, and the form data will be saved in the localstrage Visit the site again and push the load button Push the "Auto fill" button That's it.
Since the data are saved in the each site's localstrage, There is no need to worry about the saved data
http://steelydylan.github.io/FormCompleter/
MIT License