Intercept and edit HTTP/HTTPS requests and responses as they happen without the need of a proxy.

Latest Version

Version
2.0.9
Update
January 9, 2021
Size
532KiB
Developer
tamper.dev
Category
Users
30,000+
Rating
3.86207 ★
Manifest Version
2
Web Store Status
Languages Support
English (United States)
See more
Permissions
Debugger
ActiveTab
See more

Tamper Dev Extension

If you are a developer, you can use Tamper Dev to debug your websites, or if you are a pentester, you can use it to search for security vulnerabilities by inspecting the HTTP traffic from your browser.

Unlike most other extensions, Tamper Dev allows you to intercept, inspect and modify the requests before they are sent to the server, and before they are sent back to the browser interactively, and without any additional installed software.


How to use?
1. Press [ Alt ⌥ ] + [ T ] or click on the extension button
2. Filter the requests you are interested in
3. Enable interception, and trigger a new request
4. Modify all requests before they are sent to the server
5. Modify the responses before they are sent back to the browser


Need Help?
There is an FAQ at https://tamper.dev/ and you can visit https://github.com/google/tamperchrome/discussions for asking questions directly to the developers.


Want to contribute?
Tamper Dev is Free and Open Source Software. Visit https://github.com/google/tamperchrome to learn how you can contribute.


About Tamper Dev:
This is the new version of the extension previously called Tamper Chrome, but now supports multiple browsers, and does not require an auxiliary app. This extension provides functionality similar to Burp Proxy, MITM Proxy, OWASP ZAP, Tamper Data, and Postman Proxy Interceptor, but without the need of additional software, with full support of HTTPS connections, and trivial to set-up (just install).
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 2, "name": "Tamper Dev", "version": "2.0.9", "description": "Intercept and edit HTTP/HTTPS requests and responses as they happen without the need of a proxy.", "icons": { "16": "icons/white.png", "48": "icons/96x96.png", "128": "icons/256x256.png" }, "browser_action": { "default_title": "Tamper Dev", "default_icon": { "16": "icons/white.png", "48": "icons/white.png", "128": "icons/256x256.png" } }, "background": { "page": "background/background.html", "persistent": true }, "commands": { "_execute_browser_action": { "suggested_key": { "default": "Alt+T" }, "description": "Open tamper dev for the current tab" } }, "minimum_chrome_version": "87", "permissions": [ "debugger", "activeTab" ], "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"}
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How to download and manually install Tamper Dev extension for Chrome

Looking for a way to install Tamper Dev extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Tamper Dev extensions manually, this article outlines two simple methods to effortlessly install Tamper Dev extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Tamper Dev extension and manually install through Drag &Drop

If you ever need to manually install a Tamper Dev extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Tamper Dev Extension by clicking the "Download CRX" button on the website.

Look for the Tamper Dev extension you wish to install. Go to the website and download the Tamper Dev extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Tamper Dev extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Tamper Dev extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Tamper Dev extension for Chrome and install in Developer Mode

This is another method to install Tamper Dev extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Tamper Dev extension file

Select and download the Tamper Dev extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Tamper Dev extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Tamper Dev extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Tamper Dev extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Tamper Dev extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Rodolphe Breton (ID: 0000002b4e9afa18) Voted 5 ★ - Updated 07/06/2023 It simply works. Perfect tool.

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SG Apps (ID: 0000006f7b577aff) Voted 5 ★ - Updated 07/01/2023 This extension is really helpful when you don't know to use something like Burp Suite!

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zhihan peng (ID: 000000a02468c596) Voted 5 ★ - Updated 05/31/2023 very useful tool

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KNIGHT RIDERS BD GAMING (ID: 000000691416186c) Voted 5 ★ - Updated 02/07/2023 Very Good Extension

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Jarek Gołębiowski (ID: 000000a70372c828) Voted 4 ★ - Updated 11/09/2022 You can change POST payload with this, nice! Like in old Tamper Data. Not sure how filter work, if I enter there URL it disappears, but main function works. I have also seen "...probably because of enterprise policies." but just ignored it.