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What's My Headers

See exactly which HTTP headers your browser sends to a server — copy them or export them as JSON.

FreeNo sign-upRuns locally — files never leave your device

How to use this tool

The "What's My Browser" tool allows you to easily view the HTTP headers sent by your browser. This tool is useful for developers, security professionals, and users who want to know what information is being shared when they access a website.

How to use

  1. View your headers – the tool automatically displays a list of HTTP headers that your browser sends to websites, including details like User-Agent, Accept-Language, and more.
  2. Download as JSON – click the "Download JSON" button to download a JSON file containing all your header information, making it easy to share or analyze.
  3. Display with JSON highlighting – for a clearer, formatted view of the headers in JSON format, click on "Show with JSON highlight" to expand a highlighted JSON display.

Displayed information

The tool shows essential HTTP headers, which may include:

  • User-Agent – details about your browser and operating system.
  • Accept-Language – preferred language for content.
  • Referer – the URL of the previous webpage if available.
  • Accept-Encoding – supported encoding formats for data compression.
  • And more, depending on your browser's configuration.

This tool provides a straightforward view of your browser's HTTP headers, helping you better understand the information shared during your web sessions.

Your request headers

Loading your headers…

How to check your browser headers

  1. View your headers

    The page automatically lists the HTTP headers your browser sent, such as User-Agent and Accept-Language.

  2. Copy any header

    Use the copy button next to a header to copy it as Name: value.

  3. Export or inspect as JSON

    Download everything as headers.json, or show it with JSON highlighting.

Discover your browser's HTTP headers

Our HTTP Headers Viewer is a powerful tool designed to provide detailed insights into the headers your browser sends when accessing websites. Whether you're a developer, security professional, or simply curious, this tool helps you better understand what information is being shared.

Why use our HTTP Headers Viewer?

  • Quick and accurate retrieval of your browser's HTTP headers.
  • No installations or plugins required – fully browser-based.
  • Export your header information in JSON format with a single click.
  • Ideal for debugging, analysis, and improving web security.

Start now and explore your browser's headers effortlessly with our user-friendly tool. It's fast, reliable, and tailored to your needs.

Analyze your browser headers – online HTTP header viewer

Every time you visit a website, your browser sends a set of HTTP headers that contain essential details about your connection. These headers help websites understand your browser type, preferred language, and other important settings. Our HTTP Headers Viewer lets you instantly check what information your browser is sharing with websites.

What are HTTP headers?

HTTP headers are small pieces of metadata that your browser includes in web requests. They help web servers understand how to handle the request and respond accordingly. These headers can include:

  • User-Agent: identifies your browser, operating system, and device type.
  • Accept-Language: specifies your preferred language for web content.
  • Referer: indicates the previous webpage you visited before landing on a new site.
  • Accept-Encoding: lists supported compression formats to optimize page loading.
  • And more, depending on your browser’s configuration.

How to use our HTTP header viewer

Checking your browser's HTTP headers is quick and simple:

  1. View your headers: our tool automatically retrieves and displays all headers sent by your browser.
  2. Download as JSON: save a structured JSON file containing your HTTP headers for analysis.
  3. Enable JSON formatting: click "Show with JSON highlight" to display your headers in an easy-to-read format.

Create custom HTTP headers

In addition to viewing your browser headers, you may also need to create and customize HTTP headers for API requests, testing, or debugging. With our Headers Generator, you can quickly generate and download customized HTTP headers for different use cases.

Why check your browser headers?

Viewing your HTTP headers can be useful for multiple reasons:

  • Security & privacy: ensure that you're not exposing unnecessary information to websites.
  • Debugging: developers use headers to troubleshoot issues with web applications and APIs.
  • SEO & web testing: verify how different browsers interact with websites.
  • Network analysis: understand how your browser communicates with web servers.

How to protect your HTTP headers

While most HTTP headers are necessary for smooth browsing, some may reveal information you'd prefer to keep private. Here are a few ways to enhance your online privacy:

  • Use a VPN: hides your real IP address and prevents tracking.
  • Disable unnecessary headers: some browser extensions allow you to block or modify HTTP headers.
  • Use private browsing mode: limits tracking and reduces the number of headers sent.

Common questions about HTTP headers

  • Can websites track me using HTTP headers? – Some headers can reveal your browser, OS, and IP, but using privacy tools can limit this.
  • Why do developers analyze HTTP headers? – Headers provide crucial information for debugging and optimizing web applications.
  • Are HTTP headers different in each browser? – Yes, each browser and device may send slightly different headers.

Analyze & customize your HTTP headers now

Whether you're a developer, security expert, or just curious about your browser’s behavior, our tool gives you instant insights. Use our free HTTP Headers Viewer to explore what your browser is sharing with websites. If you need to generate custom HTTP headers for API requests or debugging, visit our Headers Generator tool. Explore more tools.

Frequently asked questions

What are HTTP headers?
HTTP headers are key-value pairs sent between your browser and a web server that contain information about the request or response, such as content type, language preferences, and more.
What information can I see with this tool?
Our tool displays headers such as User-Agent, Accept-Language, Referer, Accept-Encoding, and more, depending on your browser's configuration.
Can I download my headers?
Yes, you can easily download your headers in JSON format for further analysis or sharing.
Is this tool free to use?
Yes, our HTTP Headers Viewer is completely free with no hidden charges or subscriptions.
How is this tool useful for developers?
Developers can use this tool to debug and analyze the HTTP headers sent by their browsers, ensuring proper functionality, compatibility, and security of their web applications.
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