diff --git a/docs/jwt.md b/docs/jwt.md
new file mode 100644
index 0000000000..289d66b365
--- /dev/null
+++ b/docs/jwt.md
@@ -0,0 +1,90 @@
+# JWT Login Type
+
+Synapse comes with a non-standard login type to support
+[JSON Web Tokens](https://en.wikipedia.org/wiki/JSON_Web_Token). In general the
+documentation for
+[the login endpoint](https://matrix.org/docs/spec/client_server/r0.6.1#login)
+is still valid (and the mechanism works similarly to the
+[token based login](https://matrix.org/docs/spec/client_server/r0.6.1#token-based)).
+
+To log in using a JSON Web Token, clients should submit a `/login` request as
+follows:
+
+```json
+{
+ "type": "org.matrix.login.jwt",
+ "token": "<jwt>"
+}
+```
+
+Note that the login type of `m.login.jwt` is supported, but is deprecated. This
+will be removed in a future version of Synapse.
+
+The `jwt` should encode the local part of the user ID as the standard `sub`
+claim. In the case that the token is not valid, the homeserver must respond with
+`401 Unauthorized` and an error code of `M_UNAUTHORIZED`.
+
+(Note that this differs from the token based logins which return a
+`403 Forbidden` and an error code of `M_FORBIDDEN` if an error occurs.)
+
+As with other login types, there are additional fields (e.g. `device_id` and
+`initial_device_display_name`) which can be included in the above request.
+
+## Preparing Synapse
+
+The JSON Web Token integration in Synapse uses the
+[`PyJWT`](https://pypi.org/project/pyjwt/) library, which must be installed
+as follows:
+
+ * The relevant libraries are included in the Docker images and Debian packages
+ provided by `matrix.org` so no further action is needed.
+
+ * If you installed Synapse into a virtualenv, run `/path/to/env/bin/pip
+ install synapse[pyjwt]` to install the necessary dependencies.
+
+ * For other installation mechanisms, see the documentation provided by the
+ maintainer.
+
+To enable the JSON web token integration, you should then add an `jwt_config` section
+to your configuration file (or uncomment the `enabled: true` line in the
+existing section). See [sample_config.yaml](./sample_config.yaml) for some
+sample settings.
+
+## How to test JWT as a developer
+
+Although JSON Web Tokens are typically generated from an external server, the
+examples below use [PyJWT](https://pyjwt.readthedocs.io/en/latest/) directly.
+
+1. Configure Synapse with JWT logins:
+
+ ```yaml
+ jwt_config:
+ enabled: true
+ secret: "my-secret-token"
+ algorithm: "HS256"
+ ```
+2. Generate a JSON web token:
+
+ ```bash
+ $ pyjwt --key=my-secret-token --alg=HS256 encode sub=test-user
+ eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0LXVzZXIifQ.Ag71GT8v01UO3w80aqRPTeuVPBIBZkYhNTJJ-_-zQIc
+ ```
+3. Query for the login types and ensure `org.matrix.login.jwt` is there:
+
+ ```bash
+ curl http://localhost:8080/_matrix/client/r0/login
+ ```
+4. Login used the generated JSON web token from above:
+
+ ```bash
+ $ curl http://localhost:8082/_matrix/client/r0/login -X POST \
+ --data '{"type":"org.matrix.login.jwt","token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0LXVzZXIifQ.Ag71GT8v01UO3w80aqRPTeuVPBIBZkYhNTJJ-_-zQIc"}'
+ {
+ "access_token": "<access token>",
+ "device_id": "ACBDEFGHI",
+ "home_server": "localhost:8080",
+ "user_id": "@test-user:localhost:8480"
+ }
+ ```
+
+You should now be able to use the returned access token to query the client API.
diff --git a/docs/reverse_proxy.md b/docs/reverse_proxy.md
index cbb8269568..131990001a 100644
--- a/docs/reverse_proxy.md
+++ b/docs/reverse_proxy.md
@@ -3,7 +3,7 @@
It is recommended to put a reverse proxy such as
[nginx](https://nginx.org/en/docs/http/ngx_http_proxy_module.html),
[Apache](https://httpd.apache.org/docs/current/mod/mod_proxy_http.html),
-[Caddy](https://caddyserver.com/docs/proxy) or
+[Caddy](https://caddyserver.com/docs/quick-starts/reverse-proxy) or
[HAProxy](https://www.haproxy.org/) in front of Synapse. One advantage
of doing so is that it means that you can expose the default https port
(443) to Matrix clients without needing to run Synapse with root
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 2d27b0b34d..164a104045 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -1804,12 +1804,39 @@ sso:
#template_dir: "res/templates"
-# The JWT needs to contain a globally unique "sub" (subject) claim.
+# JSON web token integration. The following settings can be used to make
+# Synapse JSON web tokens for authentication, instead of its internal
+# password database.
+#
+# Each JSON Web Token needs to contain a "sub" (subject) claim, which is
+# used as the localpart of the mxid.
+#
+# Note that this is a non-standard login type and client support is
+# expected to be non-existant.
+#
+# See https://github.com/matrix-org/synapse/blob/master/docs/jwt.md.
#
#jwt_config:
-# enabled: true
-# secret: "a secret"
-# algorithm: "HS256"
+ # Uncomment the following to enable authorization using JSON web
+ # tokens. Defaults to false.
+ #
+ #enabled: true
+
+ # This is either the private shared secret or the public key used to
+ # decode the contents of the JSON web token.
+ #
+ # Required if 'enabled' is true.
+ #
+ #secret: "provided-by-your-issuer"
+
+ # The algorithm used to sign the JSON web token.
+ #
+ # Supported algorithms are listed at
+ # https://pyjwt.readthedocs.io/en/latest/algorithms.html
+ #
+ # Required if 'enabled' is true.
+ #
+ #algorithm: "provided-by-your-issuer"
password_config:
|
