Fork me on GitHub

Convenient access to common problematic values and edge cases, so you can keep them handy and access them easily during exploratory testing sessions. Just right-click an input field!

Add to Chrome Get On Chrome Web Store Get On Firefox Add-ons

note: only works on pages opened after the extension is installed. please refresh the page if nothing happens


  • Convenient access to common boundaries and edge cases for exploratory testing
  • Tiny overhead per page (<1k), no 3rd party library dependencies, completely passive, so it does not interfere with your web app execution in any way
  • Works on input fields, text areas, content editable DIVs
  • Load your own config files
  • Opensource, so you can easily extend it with your config


  • Works on multi-frame pages, but only if they are from the same domain
  • Chrome extension and Firefox addon - so only works in Chrome and Firefox

© 2015 Gojko Adzic. Magnet icon from Woothemes Ultimate Icon Set by Nishan Sothilingam.