Modify Header — Edit HTTP Request & Response Headers

Add, change or remove HTTP request and response headers per site. Profiles, filters, CORS. No ads, no tracking, no account.

HeaderDesk is a header editor to modify headers in Chrome. Add, change or remove HTTP request headers and response headers per site, group them into profiles, and see what was actually sent. WHAT SETS IT APART • Proof it works. The Check view shows the request and response headers Chrome really sent and received, so you don't have to guess. If a header isn't applied, the row tells you why: a missing site permission, a header Chrome ignores, or another extension overriding it. • No network, no surprise tabs. HeaderDesk makes no network requests of its own, has no analytics, no ads and no content scripts, and never opens a tab you didn't ask for. The only request it sends is the one you click ("Send test request"). • No account, no email, no sign-in. Every feature is in the extension. MODIFY HEADERS • Modify headers with set, append or remove, on request headers and response headers. Each row has its own on/off switch and a comment. • Header name suggestions, each with a short hint explaining what the header does. • Change your user agent or add an Authorization header in a few seconds. • Rows with a problem are flagged on the row, at edit time, and skipped. The rest keep working. PROFILES AND FILTERS • Several profiles, active at once. Drag to reorder: the top profile wins. • Scope a profile to all sites, chosen sites, or this tab only. Filter by URL pattern or regex, request domain, initiator domain, resource type and HTTP method. • "Test a URL" shows which rows apply to an address, and why. • Pause everything with one click or Alt+Shift+H. The badge shows how many headers are active. REDIRECTS, COOKIES AND SHORTCUTS • Redirect one URL to another per profile, with a URL filter or a regex. Regex groups such as \1 work in the target. • Cookie helpers: send a Cookie header, or build a Set-Cookie header in a simple form. • Paste headers copied from DevTools or curl, duplicate a profile, or copy one as text to share. Turn profiles 1 to 4 on or off with keyboard shortcuts you choose. PERMISSION, ONE SCOPE AT A TIME • Installing shows no "read and change all your data" prompt. HeaderDesk asks for access to the sites a profile uses, when you set it up. "All sites" is one click if you prefer it. • See every site you've allowed and remove any of them. CORS HEADER EXTENSION • One-click "Allow CORS" preset that adds the response headers a cross-origin request needs. • Honest about its limits: a wildcard origin can't be used with credentials, and a preflight that fails with an error status can't be fixed by headers. HeaderDesk says so. YOUR RULES STAY YOURS • Autosave on every edit, and undo for deleted rows and profiles. • Export and import profiles as JSON. Imports profiles exported from ModHeader, Requestly and Header Editor. • Automatic local backups (the last 10) before every import and update, with a restore screen. • Sensitive values such as Authorization and Cookie are masked by default and masked again in exports. PRIVACY HeaderDesk collects nothing and sends nothing anywhere. Your profiles are stored on your device. Check-view request logs stay in that view's memory and are gone when you close it. Works as a popup and a resizable side panel. Available in 51 languages. Requires Chrome 120 or later. Not affiliated with ModHeader.