Visual Hashing, Password Reminders For Chrome And Firefox

Martin Brinkmann
Dec 20, 2011
Updated • Apr 26, 2015
Firefox add-ons, Google Chrome, Google Chrome extensions

All you see are asterisks whenever you enter passwords on the Internet. This makes it near impossible to make sure the correct password has been entered.

The only indicator is the length of the password, but that works best for short passwords and not so good for larger more secure ones as it takes time to count the characters that you have entered.

Visual Hashing, a new add-on for the Firefox web browser and extension for Chrome, changes this by adding visual password reminders to password prompts on the Internet.

The idea is simple: Generate a hash code for a password the user enters and visualize that hash with four colors in the password field.

The user recognizes the colors over time, and gets a confirmation that the right password has been entered right on the screen.

Using the add-on may be somewhat confusing in the beginning, as new colors appear whenever you add or remove a char from the entered password.

Visual Hashing helps you make sure that you do not enter a wrong password in password fields on the Internet. While that may sound superfluous to some users, as you can simply re-enter passwords if they are not accepted, it may be useful to others.

Visual Hashing integrates well into most sites. It works for instance on Twitter, Facebook and Google properties. The four colors begin to appear after you start to enter the first character of the password into the form on the site which works both on sign-up forms and on sign-in forms.

The developer is currently consideringadding new features to the add-on. Among the options could be a password hint that indicates whether the password is correct or not, or options to keep track of passwords that are being reused to inform users about the dangers of it.

Colors will always appear slightly different to avoid password hash information leaking out through screenshots. The color differences are not recognizable to the human eye.

Firefox users can download Visual Hashing from the official Mozilla Firefox add-on repository, Chrome users from the Chrome Web Store.

Source code and additional information are available on the developer's blog.

Review Date
Reviewed Item
Visual Hashing
Author Rating

Tutorials & Tips

Previous Post: «
Next Post: «


  1. charliechan said on January 5, 2012 at 12:33 am

    Very interesting idea, I’ll have to give this a try.

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.