Modify HTTP Headers (HTTP Header) - FlexHeader
Extension Actions
- Live on Store
Add, modify & delete HTTP request/response headers with URL & regex rules. Open-source, private, no data collection
FlexHeaders makes it easy to modify HTTP request and response headers directly from your browser. Create pages for different websites, environments or scenarios; add regex or url filters and pause pages at any time.
Key Features:
-🛡️ Add, Modify and Remove HTTP headers for any request
-♾️ Sync functionality for cross browser syncing (chrome profile)
-🔧 Export/Import feature to share with colleagues or friends
-🔓 Open Source, you can find the source code here: https://github.com/harrisondeo/FlexHeader
-🔀 Import ModHeader export JSON allowing you to get back working easily.
-💼 Enable multiple pages at same time
-🌐 URL & Regex filtering for all pages
-🔎 Header searching
-📝 Header comments so you can annotate
-✨ Autocomplete for common header names
-⏫ Sort headers by name, comment or value
-↩️ Undo and redo changes
-🌙 Light & dark mode
-↔️ Collapsible sidebar
Advanced features include being able to drag & drop reorder headers, set the font size within the popup, enable/disable all headers with 1 button, sync config across same chrome profile on different browsers/computers.
Edit HTTP Headers easily with FlexHeaders, an open-source Chrome extension designed for developers and privacy-conscious users who need to modify or edit HTTP request headers on the fly.
Latest reviews
- 阿帕奇
- Clean, focused, and genuinely useful. FlexHeader makes modifying HTTP headers straightforward without getting in the way, and it has been very handy for development and testing workflows. One suggestion: please add a link in the extension UI to documentation for the filter rule syntax. The include/exclude behavior is important, but right now users may need to read the source code to understand the exact matching rules.
- Alpaben Charan
- Really useful and easy-to-use extension for quickly modifying HTTP headers during testing. The interface is clean, the setup is straightforward, and it works reliably without adding unnecessary complexity. Definitely a handy tool for developers and testers.
- jj holt
- As good or better than my previous one
- Shimal Soni
- This extension has completely earned its spot in our daily workflow and is now being widely used across our entire department. Here is why it stands out: Interface: It is a really clean and exceptionally well-designed extension. It avoids the clunky UI that many other developer tools suffer from. Usability: It is straightforward, lightweight, and does exactly what it promises without any unnecessary bloat. I highly recommend it to any developers or testers who need a reliable way to manage HTTP headers. Fantastic work!
- Marco Trash
- This addon works well, and the developer was very fast to react to a minor issue that was found, very appreciated.
- David Lubertozzi
- Works great, easy to use and configure, no nagware, one of the better ones I've tried, thanks!
- Karel Smetana
- Works like expected, thanks
- Zach Crittendon
- This is the best extension I've ever used for modifying HTTP request headers. Things I love: - Adding and removing headers is super easy - Headers can be disabled without removing them, which I use all the time. - Different configs can be created using "Pages," which is super handy when you need to manage different sets of headers. - Sensitive headers can be restricted to specific sites using "include" or "exclude" patterns. Best of all, it's open source and doesn't do anything shady. (I switched from MODHEADERS when I discovered it was injecting ads on to Google search results pages.)
- Volgis Korh
- Wonderful, it works smoothly. The interface is very simple. Thanks
- Yury Pavlovsky
- Currently fails to modify response headers (requests are fine), so in present state it pretty much defeats the purpose.
- David MArtinez
- I love this application.
- Paul Schenk
- Great application, works flawless, i can only recommend it. It has al you need from my perspective - allows to create multiple pages; each with included urls (or parts of it) and headers to add for requests or responses - allows export and import, modification of pages, renaming - available for multiple browsers (so export from one and import to the others) The developer is very responsive if there are any questions. Looking at https://github.com/harrisondeo/FlexHeader issues will also help to fix issues that are introduced by browsers, and are not an issue of the plugin itself.
- Andy wong
- great and useful especial the import and export
- Daniel Richardson
- Perfect extension, does exactly what it's meant to do and nothing else superfluous.
- Omer Šabić
- Easy to use, just works as intended. Thanks :)
- Nathan Millar
- Fantastic extension. I've started using this since other extensions are trying to do a little too much and far more than what I need for my use case. This extension does exactly what I need. It is easy to use and well designed. A great job!
- Q
- Hey, would you consider making this open source? Great extension.
- yasin yaqoobi
- The new modheader.com extension looks and acts like a spyware now. It collects way too much info. Honestly it should be banned. Took me a while to figure out a good extension that will let me easily modify the headers without loading a new options page and jumping through a bunch of hoops. Great Job. Hope this gets more popular.