Speed up your web development while reducing bugs


For individual use

Available to everyone!
  • Unlimited header modifications
  • Redirect URLs
  • Advanced cookie header modification
  • Mock, replay, and modify response
  • Up to 3 behavior changes
Advanced filters
  • Filter by URL pattern, tab, and resource type
  • Filter by window / tab group
  • Auto disable by time
Team collaboration
  • Export and import profile
  • Up to 3 profiles
  • Share profiles with up to 3 people
  • Import auto-sync profile
  • Share profiles with other users in an organization
  • Customize autocomplete entries


Do I need to pay to use ModHeader?
ModHeader is free to use. You can use most of its functionalities without subscribing to the Pro plan. With the Pro plan, you will unlock additional time saving tools and enhanced team collaborations.
Can I cancel my subscription? What is the refund policy?

You can cancel your Pro subscription at any time on our website. If you cancel before the end of the subscription term, your subscription will remain active until the end of your subscription term.

If you are unhappy with the Pro subscription, please contact us and we will do our best to address your concern.

Do I need a separate subscription for ModResponse?

Your account and subscription for ModHeader will automatically work for ModResponse and vice versa. You only need one subscription to get the Pro features for both extensions.

How do I purchase ModHeader Pro for my organization?

You can purchase multiple licenses when you check out. If you have an existing subscription, you can add / remove licenses as needed. You can give licenses to other users from the organization page.

Can I use ModHeader Pro on multiple browser / computer?

Yes! You can use your ModHeader Pro license on as many browser / computer as you would like. In fact, it is very common for our users to use ModHeader on many browser profiles. You can use create login URL tool to help you login to different browsers quickly.