Web Cryptography

- REC

JavaScript API for performing basic cryptographic operations in web applications

IE

  1. 5.5
  2. 6 - 10
  3. 11

Edge

  1. 12 - 18
  2. 79 - 81
  3. 83

Firefox

  1. 2 - 31
  2. 32 - 33
  3. 34 - 75
  4. 76
  5. 77 - 78

Chrome

  1. 4 - 36
  2. 37 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 7
  2. 7.1 - 10.1
  3. 11 - 13
  4. 13.1
  5. TP

Opera

  1. 9 - 23
  2. 24 - 67
  3. 68

iOS Safari

  1. 3.2 - 7.1
  2. 8 - 10.3
  3. 11 - 13.3
  4. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4 - 10.1
  2. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

Many browsers support the [crypto.getRandomValues()](#feat=getrandomvalues) method, but not actual cryptography functionality under crypto.subtle.

Resources:
Cross-browser cryptography library
Microsoft Research JavaScript Cryptography Library
MDN Web Docs - Web Crypto API
Test suite for various algorithms/methods
Support for recommended algorithms in Firefox
PKI.js - another crypto library for Public Key Infrastructure applications
Polyfill by Netflix with partial support
Web Cryptography API shim for IE11 and Safari - set of bugfixes and workarounds of prefixed api implementations
The History and Status of Web Crypto API