Import your ModHeader profiles into Wirelet

Wirelet reads the JSON file that ModHeader exports. The imported profiles are added after yours: nothing you already have in Wirelet is changed or deleted. A report then says what was kept, adapted, ignored or switched off.

First: do you have an export file?

ModHeader is no longer available on the Chrome Web Store or on Microsoft Edge Add-ons, so it can’t be installed again to export your profiles.

• ModHeader is still installed and enabled in your browser: export now, from step 1.
• You saved an export file before: start at step 2.
• ModHeader was removed, or your browser turned it off: its profiles can no longer be exported, and Wirelet has no other way to read them. Recreate them in Wirelet instead: paste a header copied from the developer tools, or a curl command, and its headers are added to the profile.

Step by step

1. In ModHeader, use its export to JSON and save the .json file.
2. Install Wirelet: Chrome Web Store or Microsoft Edge Add-ons.
3. Open Wirelet’s settings: click the Wirelet icon in the toolbar, then the gear (“Settings”), and go to “Import and export”.
4. Under “Import a file”, click “Choose a file” and pick your ModHeader export.
5. Read the report: its first line counts the imported profiles that are switched off, then each profile comes with its switch and its notes.
6. Switch on the profiles you need, one by one or with “Switch on all”. Your browser then asks for access to their sites: allow it, or the profile shows “Blocked” until you do.

What the report shows

The first line counts the profiles, for example “3 profiles imported, all switched off: switch on the ones you need.” Then each profile has its switch and its notes:

Adapted

A setting Wirelet applies a little differently: a comma-separated append applied as an append, an empty value that removes the header (as ModHeader does), a URL filter converted to sites.

Ignored

What Wirelet has no equivalent for: URL replacements (Wirelet only changes headers), ModHeader’s cookie list (use a Cookie header), its own Set-Cookie and CSP lists (use a response header).

Off

A profile that would apply more widely in Wirelet than in ModHeader is imported switched off: an exclusion Wirelet can’t match exactly, a filter by request type, tab, window, time or method, a filter it doesn’t know. So are the profiles that weren’t in use in ModHeader, and those beyond the free plan’s limits.

Wirelet never makes a profile apply more widely than it did: when a filter can’t be kept exactly, the profile stays off until you check its sites.

Free plan

The free plan allows up to 3 profiles on at a time and 10 active headers in total. Profiles beyond that are imported switched off, and nothing is lost. During early access, Pro features, unlimited profiles included, cost nothing.