Simple end-to-end encryption to secure email and attachments on Google.

Latest Version

Version
8.5.7
Update
October 23, 2024
Size
3.39MiB
Developer
flowcrypt.com
Category
Users
80,000+
Rating
4.74586 ★
Manifest Version
3
Web Store Status
Languages Support
English
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Permissions
Alarms
Storage
Tabs
Scripting
UnlimitedStorage
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FlowCrypt: Encrypt Gmail with PGP Extension

🟢 A simple end-to-end encryption to secure your emails and attachments on Google, including Google Workspace, Business, and Enterprise using OpenPGP.

🟢 FlowCrypt lets you use PGP encryption by generating a private and public key. It uses the recipient’s public key to encrypt the email, and only the recipient’s private key can decrypt the message and reveal its content.

🟢 Adds a Secure Compose button to Gmail, allowing you to send private PGP-encrypted emails when you choose to.

🟢 We update the extension regularly (see the \"Updated\" field to the right).

FlowCrypt allows you to:
✔ Set up the extension in just a few clicks.
✔ Generate private keys using the ECC and RSA (up to 4096-bit) algorithms.
✔ Use FlowCrypt’s own Attester public key server.
✔ Send and receive encrypted emails and attachments (up to 25MB, with previewing functionality) to anyone.
✔ Send and receive encrypted emails directly or through Encrypted Contact Page.
✔ Send password-protected emails to the recipient who doesn’t have any OpenPGP software (as well as receive such emails).
✔ Sign encrypted emails to let your recipients verify that the message is from you and that the content hasn’t been modified.

🌐 Website: https://flowcrypt.com/
📁 Source code: https://github.com/FlowCrypt/
📚 Documentation: https://flowcrypt.com/docs/
🧠 Knowledge Base: https://flowcrypt.com/blog/questions/
📱 Android & iOS apps: https://flowcrypt.com/download

📩 Looking forward to your feedback! Please email us at [email protected].
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "FlowCrypt: Encrypt Gmail with PGP", "description": "Simple end-to-end encryption to secure email and attachments on Google.", "version": "8.5.7", "action": { "default_icon": { "16": "/img/logo/flowcrypt-logo-16-16.png", "19": "/img/logo/flowcrypt-logo-19-19.png", "24": "/img/logo/flowcrypt-logo-24-24.png", "32": "/img/logo/flowcrypt-logo-32-32.png", "48": "/img/logo/flowcrypt-logo-48-48.png", "64": "/img/logo/flowcrypt-logo-64-64.png", "128": "/img/logo/flowcrypt-logo-128-128.png" }, "default_title": "FlowCrypt Encryption for Gmail", "default_popup": "/chrome/popups/default.htm" }, "icons": { "16": "/img/logo/flowcrypt-logo-16-16.png", "19": "/img/logo/flowcrypt-logo-19-19.png", "24": "/img/logo/flowcrypt-logo-24-24.png", "32": "/img/logo/flowcrypt-logo-32-32.png", "48": "/img/logo/flowcrypt-logo-48-48.png", "64": "/img/logo/flowcrypt-logo-64-64.png", "128": "/img/logo/flowcrypt-logo-128-128.png" }, "permissions": [ "alarms", "storage", "tabs", "scripting", "unlimitedStorage" ], "host_permissions": [ "https://flowcrypt.com/*", "https://*.google.com/*", "https://outlook.live.com/*", "https://outlook.office365.com/*", "https://outlook.office.com/*", "https://graph.microsoft.com/*", "https://login.microsoftonline.com/*", "https://www.googleapis.com/*" ], "content_scripts": [ { "matches": [ "https://mail.google.com/*" ], "css": [ "/css/webmail.css", "/css/sweetalert2.css" ], "js": [ "/lib/trusted-types.js", "/lib/purify.js", "/lib/jquery.min.js", "/lib/openpgp.js", "/lib/sweetalert2.js", "/lib/streams_web.js", "/lib/emailjs/punycode.js", "/lib/iso-8859-2.js", "/lib/trusted-types.js", "/lib/emailjs/emailjs-stringencoding.js", "/lib/emailjs/emailjs-mime-codec.js", "/lib/emailjs/emailjs-mime-types.js", "/lib/emailjs/emailjs-addressparser.js", "/lib/emailjs/emailjs-mime-builder.js", "/lib/emailjs/emailjs-mime-parser.js", "/js/content_scripts/webmail_bundle.js" ] }, { "matches": [ "https://www.google.com/robots.txt*" ], "js": [ "/js/common/oauth2/oauth2_inject.js" ], "run_at": "document_start" } ], "background": { "service_worker": "/js/service_worker/background.js", "type": "module" }, "options_ui": { "page": "/chrome/settings/index.htm", "open_in_tab": true }, "web_accessible_resources": [ { "resources": [ "/css/webmail.css", "/img/svgs/reply-icon.svg", "/img/svgs/spinner-white-small.svg", "/img/svgs/spinner-green-small.svg", "/img/svgs/unlock.svg", "/img/logo/flowcrypt-logo-19-19.png", "/chrome/elements/compose.htm", "/chrome/elements/pgp_block.htm", "/chrome/elements/attachment.htm", "/chrome/elements/attachment_preview.htm", "/chrome/elements/passphrase.htm", "/chrome/elements/add_pubkey.htm", "/chrome/elements/pgp_pubkey.htm", "/chrome/elements/backup.htm", "/chrome/elements/oauth2.htm", "/js/common/core/feature-config-injector.js" ], "matches": [ "https://mail.google.com/*", "https://accounts.google.com/*", "https://www.google.com/*" ] } ], "minimum_chrome_version": "96", "content_security_policy": { "extension_pages": "script-src 'self'; frame-ancestors https://mail.google.com 'self'; img-src 'self' https://* data: blob:; frame-src 'self' blob:; worker-src 'self'; form-action 'none'; media-src 'none'; font-src 'none'; manifest-src 'none'; object-src 'none'; base-uri 'self';" }}
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How to download and manually install FlowCrypt: Encrypt Gmail with PGP extension for Chrome

Looking for a way to install FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP extensions manually, this article outlines two simple methods to effortlessly install FlowCrypt: Encrypt Gmail with PGP extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download FlowCrypt: Encrypt Gmail with PGP extension and manually install through Drag &Drop

If you ever need to manually install a FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP Extension by clicking the "Download CRX" button on the website.

Look for the FlowCrypt: Encrypt Gmail with PGP extension you wish to install. Go to the website and download the FlowCrypt: Encrypt Gmail with PGP extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP extension for Chrome and install in Developer Mode

This is another method to install FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP extension file

Select and download the FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP 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 FlowCrypt: Encrypt Gmail with PGP extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Ralph DiZazzo (ID: 00000038147f85b9) Voted 2 ★ - Updated 10/04/2023 I sent a test email 50 minutes ago and it has not yet been received. Tried again and it has been 15 minutes and not received also. This is disapointing

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Edward Boot (ID: 000000ac556fa19e) Voted 1 ★ - Updated 09/26/2023 Does not work at all, gets stuck in a Google sign in page loop, wasted of time installing and trying to fix.

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Nathan Palmer (ID: 0000002b90a30e94) Voted 4 ★ - Updated 09/10/2023 I liked this extension when I used it in the past. However, it does not work with Google's Advanced Protection service. I really wish that Google would allow this app for those that are enrolled in the Advanced Protection Program. The inability to use this app under that service really irritates me.

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` (ID: 000000363389473b) Voted 1 ★ - Updated 06/16/2023 This software is already obsolete. No support response, no update nor no severe security fix. In addition, hardcoded part is also too old, so many functions don't work. To keep your pgp/gpg providing security, this is already dead. We need other open sourse fine pgp/gpg frontend for gmail. I completely disappointed this front end of pgp/gpg. Especially, this extention breaks our pgp/gpg encryped or signed email. At this moment, we must call it non-secure ware just saying itself sesure, unfortunately this is same as malware. Do not use it.

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Андрей Юрьевич Косолапов адвокат (Адвокат) (ID: 00000088ddc82709) Voted 5 ★ - Updated 08/22/2022 Крутая вещь