Paramant for Gmail — send encrypted attachments without leaving your inbox.
The Paramant Chrome extension adds a button to Gmail's compose window. Select a file, the extension uploads it to Paramant, and inserts the burn-on-read link into your email. The recipient downloads it once; then it is gone.
Before you start
- Chrome or Chromium — version 120 or later
- Gmail in a browser tab — gmail.com or Google Workspace
- Paramant account with an API key — create an account if you don't have one
- Firefox / Safari — not supported; use the web uploader instead
- Gmail mobile app — extensions do not run in mobile apps
Installation
Install the extension
Open Chrome and go to the Chrome Web Store. Search for Paramant or find it under the developer name Apolloccrypt. Click Add to Chrome, then Add extension in the confirmation dialog.
The Paramant icon (a small shield) will appear in your Chrome toolbar. If it is hidden, click the puzzle icon in the toolbar and pin Paramant.
Enter your API key
Click the Paramant icon in the toolbar. A popup opens with a single field: API key. Paste your API key from your Paramant dashboard and click Save.
The extension stores the key locally in Chrome's extension storage — it is not transmitted anywhere except to paramant.app when you upload a file.
Your API key is in Dashboard → API keys. If you don't see one, click Generate new key.
Verify the connection
The popup shows a green indicator and your account email when the key is valid. If you see a red indicator, double-check that you copied the full 64-character key with no trailing spaces or line breaks.
Sending a file from Gmail
Open a compose window
In Gmail, click Compose. At the bottom of the compose window, you will see the Paramant shield icon alongside the standard Gmail toolbar icons.
Click the Paramant icon and select a file
Click the shield icon. A file picker opens. Select the file you want to send. The extension uploads it to Paramant in the background — you can see a progress indicator in the compose toolbar.
Files up to 5 GB are supported. Upload speed depends on your connection; a progress bar appears for large files.
The link is inserted automatically
When the upload completes, the extension inserts a formatted line into your email body:
Secure file: [filename] — download once at paramant.app/get/XXXXX
(link expires in 24 hours, file deleted after download)
Edit the text around the link as needed, then send your email normally.
Recipient downloads the file
Your recipient clicks the link. They see the file name and size, click Download, and the file is delivered. The link and file are deleted immediately after the first download. If the recipient tries the link again, they get a 404.
Extension settings
Click the Paramant toolbar icon at any time to access settings:
- Default TTL — how long the link stays active before expiring without a download. Default is 24 hours; options range from 1 hour to 7 days.
- Link format — plain URL or formatted text block. Plain URL is better if the recipient's email client does not render HTML.
- Transfer history — a list of recent uploads with their status (active, downloaded, expired). Only stored locally, not synced.