# mailvelope/mailvelope

Browser extension for OpenPGP encryption with Webmail

Repository: https://github.com/mailvelope/mailvelope
Canonical: https://ross.abutalabs.com/products/mailvelope
Language: JavaScript
License: AGPL-3.0
License Family: copyleft
Last push: 2026-07-28T16:07:57+00:00

## Health v2 (maintenance only)
Score: 85/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 94, release rhythm 64, longevity 100
- inputs: {"age_days": 5122, "days_push": 36, "days_rel": 83, "gap_med": 146, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1838, forks 221 (observed 2026-08-28T04:05:42.810778+00:00)

## What it is
Mailvelope is a browser extension for Chrome and Firefox that adds OpenPGP end-to-end email encryption to arbitrary webmail providers. It uses OpenPGP.js as its cryptographic backend and offers a client API for integrating encryption into web applications.

## Use cases
- send PGP-encrypted email from Gmail or other webmail
- decrypt OpenPGP messages in the browser
- manage OpenPGP keys for webmail encryption
- integrate PGP encryption into a web app via client API
- sign emails with OpenPGP in the browser

## When to choose
- you want end-to-end encrypted email with an existing webmail provider
- you need OpenPGP support in Chrome or Firefox without a desktop mail client
- you want a well-established, actively maintained browser-based PGP solution

## When to avoid
- you need encrypted email on mobile devices
- you use a native mail client that already supports OpenPGP
- you need S/MIME rather than OpenPGP

## Facets
- artifact type: plugin
- maturity: active
- function: cryptography, security, email, browser-extension
- domain: security, privacy, email, browser-extensions
- platform: browser, browser-extension
- tags: openpgp, pgp-encryption, webmail, email-encryption, chrome-extension, firefox-addon, end-to-end-encryption, javascript

## Member repositories
- mailvelope/mailvelope (main) score 85

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:42.810778+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:18:16.888028+00:00, confidence not recorded.
  - readme: https://github.com/mailvelope/mailvelope (fetched 2026-08-28T04:05:42.810778+00:00, sha 07418b2b7230)
- Data as of 2026-08-30T08:39:29.467469+00:00.