Chrome: Fill out same form many times for testing

You can check out iMacros for Chrome:

https://chrome.google.com/webstore/detail/imacros-for-chrome/cplklnmnlbnpmjogncfgfijoopmnlemp

There are some plugins. I used the below one, and it can satisfy your requirement. This extension allows you to fill all form inputs with dummy data.

https://chrome.google.com/webstore/detail/form-filler/bnjjngeaknajbdcgpfkgnonkmififhfo

Here this one is for storing the form data and reusing it later. plugin populates with the data saved later when you want to fill it again.

https://chrome.google.com/webstore/detail/simple-form-filler/hbgbedpagfcecmjmlfpndghfclhnmmll/details

Hope this helps

Call it a rudimentary answer, but I believe the button shortcuts in Chrome accept Javascript. I've done this with FireFox by doing something like:

javascript:document.formname.fieldname.value='value';document.formname.fieldname2.value='value';document.formname.fieldname3.value='value';return false;