Headerly
Headerly is a browser tool that lets users create and manage profiles to control HTTP request and response headers. Each profile defines matching conditions, actions like modifying headers, redirecting, blocking, or allowing requests, and a priority level. It leverages the browser's Declarative Net Request API, making it useful for web developers and power users who need to customize network behavior, test APIs, or enforce specific header policies.
FreemiumMITWeb
50stars
6forks
6features
2025since
Overview
6 featuresHeaderly is a Browser DevTools & extensions project. Easily managing, modifying, and debugging HTTP headers and request behaviors in the browser without writing complex code. It is built as a consumer product for web developers. There is a free tier. Headerly is available on the web.
Headerly builds and maintains Headerly, and it first shipped in 2025. The project is developed in the open on GitHub with 50 stars and 104 commits in the last 90 days. Among its 6 catalogued features are Header Modification, Request Redirects, and Request Blocking.
Summary written by a language model from the project’s public pages.
- Header Modification
- Request Redirects
- Request Blocking
- Rule Prioritization
- Profile Management
- Sync Cookies
Tags
http-headersdeclarative-rulesbrowser-dnrrequest-modificationheader-manager
Built with & integrations
Framework
Vue
Hosting
Cloudflare
Runs on
Browser
Detected from
- Vue
- bdata-v- in the HTML
- Cloudflare
- cf-ray header · cf-cache-status header
Trust & compliance
License
MIT
Verified signals
Indexing history
1What PulseGate has recorded for this listing
- Indexed3 Aug · 08:11 UTCheaderly/headerly verified against its public sourceSource: PulseGate · Open
Frequently asked questions about Headerly
- What does Headerly do?
- Easily managing, modifying, and debugging HTTP headers and request behaviors in the browser without writing complex code. It is catalogued under Browser DevTools & extensions on PulseGate.
- Who should use Headerly?
- Headerly is a consumer product built for web developers.
- Is Headerly free?
- Yes — there is a free tier, with paid plans for advanced use.
- What platforms does Headerly run on?
- Headerly runs on the web.
- Is Headerly still active?
- The GitHub repository shows 104 commits in the last 90 days.
- What projects are similar to Headerly?
- Similar projects tracked by PulseGate include QuickOWL, Lelp, and NoFeed.QuickOWLLelpNoFeed
- Who makes Headerly?
- Headerly is developed by Headerly.
- When did Headerly launch?
- Headerly first shipped in 2025.
Also in Browser DevTools & extensions
Same category — not a similarity match