diff --git a/img/json.gif b/img/json.gif
new file mode 100644
index 0000000..af158bc
Binary files /dev/null and b/img/json.gif differ
diff --git a/itsb.xml b/itsb.xml
index 3a50ee2..4fc5194 100644
--- a/itsb.xml
+++ b/itsb.xml
@@ -39,28 +39,28 @@
       <region>Canada</region>
       <type>Rail, aviation, marine, pipeline</type>
       <feed lang="English" format="rss" type="rail" id="tsb-en-rail">
-        <link>http://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Rail.xml</link>
+        <link>https://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Rail.xml</link>
       </feed>
       <feed lang="French" format="rss" type="rail" id="tsb-fr-rail">
-        <link>http://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Rail.xml</link>
+        <link>https://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Rail.xml</link>
       </feed>
       <feed lang="English" format="rss" type="aviation" id="tsb-en-aviation">
-        <link>http://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Air.xml</link>
+        <link>https://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Air.xml</link>
       </feed>
       <feed lang="French" format="rss" type="aviation" id="tsb-fr-aviation">
-        <link>http://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Aviation.xml</link>
+        <link>https://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Aviation.xml</link>
       </feed>
       <feed lang="English" format="rss" type="marine" id="tsb-en-marine">
-        <link>http://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Marine.xml</link>
+        <link>https://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Marine.xml</link>
       </feed>
       <feed lang="French" format="rss" type="marine" id="tsb-fr-marine">
-        <link>http://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Marine.xml</link>
+        <link>https://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Marine.xml</link>
       </feed>
       <feed lang="English" format="rss" type="pipeline" id="tsb-en-pipeline">
-        <link>http://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Pipeline.xml</link>
+        <link>https://www.bst-tsb.gc.ca/eng/fils-feeds/TSB%20Pipeline.xml</link>
       </feed>
       <feed lang="French" format="rss" type="pipeline" id="tsb-fr-pipeline">
-        <link>http://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Pipeline.xml</link>
+        <link>https://www.bst-tsb.gc.ca/fra/fils-feeds/BST%20Pipeline.xml</link>
       </feed>
     </source>
 
diff --git a/itsb.xsd b/itsb.xsd
index 10cea75..790c34d 100644
--- a/itsb.xsd
+++ b/itsb.xsd
@@ -310,6 +310,7 @@
                               <xs:enumeration value="rss" />
                               <xs:enumeration value="atom" />
                               <xs:enumeration value="rdf" />
+                              <xs:enumeration value="json" />
                             </xs:restriction>
                           </xs:simpleType>
                         </xs:attribute>
diff --git a/jq/convert/atom2jsonfeed.jq b/jq/convert/atom2jsonfeed.jq
new file mode 100644
index 0000000..02084bc
--- /dev/null
+++ b/jq/convert/atom2jsonfeed.jq
@@ -0,0 +1,52 @@
+# Atom->JSON Feed converter
+# Expects xmltodict JSON output as input, outputs a JSON Feed 1.1 feed backwards-compatible with 1.0
+# Does not support entries without links.
+# Required variables:
+# $feed_url: Absolute URL to the resulting JSON Feed
+
+def ensure_string: if type == "array" then .[0] else . end | if type == "object" then .["#text"] else . end;
+def ensure_array: (. // []) | if type == "array" then . else [.] end;
+def find_links(rel): [(.link // []) | if type == "array" then .[] else . end | select(.["@rel"] == rel)];
+def parse_authors: [
+        ((.author | ensure_array) + (.contributor | ensure_array))[]
+        | . as $author
+        | {"name": .name}
+        | if $author.uri then .url = $author.uri else . end
+    ];
+
+.feed | . as $feed | {
+    "version": "https://jsonfeed.org/version/1.1",
+    "title": (.title | ensure_string),
+    "home_page_url": find_links("alternate")[0]["@href"],
+    "feed_url": $feed_url,
+    "description": (.description | ensure_string // ""),
+    "expired": false,
+    "authors": parse_authors,
+    "items": [
+        .entry | ensure_array[] | select(.link) | . as $entry | {
+            "id": .id,
+            "title": (.title | ensure_string),
+            "url": find_links("alternate")[0]["@href"],
+            "date_published": (.published // .updated),
+            "date_modified": .updated,
+            "authors": parse_authors,
+            "tags": [
+                .category | ensure_array[] | .["@term"]
+            ],
+            "attachments": [
+                find_links("enclosure")[] | {
+                    "url": .["@href"],
+                    "size_in_bytes": .["@length"],
+                    "mime_type": .["@type"]
+                }
+            ],
+            "content_html": (.content | ensure_array[0] | ensure_string // "")
+        }
+        # Optional summary
+        | if $entry.summary then .summary = ($entry.summary | ensure_string // "") else . end
+        # Optional external URL
+        | if ($entry|find_links("related")[0]) then .external_url = ($entry|find_links("related")[0]["@href"]) else . end
+    ]
+}
+# Optional icon
+| if $feed.icon then .icon = $feed.icon else . end
diff --git a/jq/convert/rss2jsonfeed.jq b/jq/convert/rss2jsonfeed.jq
new file mode 100644
index 0000000..01485c2
--- /dev/null
+++ b/jq/convert/rss2jsonfeed.jq
@@ -0,0 +1,43 @@
+# RSS->JSON Feed converter
+# Expects xmltodict JSON output as input, outputs a JSON Feed 1.1 feed backwards-compatible with 1.0
+# Does not support RSS items without links.
+# Required variables:
+# $feed_url: Absolute URL to the resulting JSON Feed
+
+def ensure_string: if type == "array" then .[0] else . end | if type == "object" then .["#text"] else . end;
+def ensure_array: (. // []) | if type == "array" then . else [.] end;
+
+.rss.channel | . as $channel | {
+    "version": "https://jsonfeed.org/version/1.1",
+    "title": (.title | ensure_string),
+    "home_page_url": (.link | ensure_string),
+    "feed_url": $feed_url,
+    "description": (.description | ensure_string),
+    "expired": false,
+    "items": [
+        .item | ensure_array[] | select(.link) | . as $item | {
+            "id": (.guid // .link | ensure_string),
+            "title": .title,
+            "url": .link,
+            "content_html": (.description // "" | ensure_string),
+            "tags": [
+                .category | ensure_array[] | ensure_string
+            ],
+            "attachments": [
+                .enclosure | ensure_array[] | {
+                    "url": .["@url"],
+                    "size_in_bytes": .["@length"],
+                    "mime_type": .["@type"]
+                }
+            ]
+        }
+        # Optional publication date
+        | if $item.pubDate then .date_published = ($item.pubDate | strptime("%a, %d %b %Y %T %z") | mktime | todateiso8601) else . end
+        # Optional author
+        | if $item.author then .author = {"name": $item.author} | .authors = [.author] else . end
+    ]
+}
+# Optional language
+| if $channel.language then .language = $channel.language else . end
+# Optional icon
+| if $channel.image then .icon = $channel.image.url else . end
diff --git a/xslt/itsb.xsl b/xslt/itsb.xsl
index ed7d3d9..3cf84f8 100644
--- a/xslt/itsb.xsl
+++ b/xslt/itsb.xsl
@@ -6,9 +6,10 @@
     xmlns:itsb="http://tilde.town/~lucidiot/itsb/">
   <xsl:output method="xml" />
 
-  <!--
-  Preprocesses the itsb.xml file to autocomplete with converted feeds.
-  -->
+  <!-- Preprocesses the itsb.xml file to autocomplete with converted feeds. -->
+
+  <!-- Caution: Final slash is required. -->
+  <xsl:variable name="itsbRoot" select="'https://tilde.town/~lucidiot/itsb/'" />
 
   <xsl:template match="node()|@*">
     <xsl:copy>
@@ -24,58 +25,119 @@
     <xsl:variable name="type" select="@type" />
 
     <!-- This is an Atom feed and there is no RSS feed: add a conversion -->
-    <xsl:if test="@format = 'atom' and not(../itsb:feed[((not(@lang) and not($lang)) or @lang = $lang) and ((not(@type) and not($type)) or @type = $type) and (@format = 'rss' or @format = 'rdf')])">
-      <feed>
-        <xsl:if test="@lang">
-          <xsl:attribute name="lang">
-            <xsl:value-of select="@lang" />
+    <xsl:choose>
+      <xsl:when test="@format = 'atom' and not(../itsb:feed[((not(@lang) and not($lang)) or @lang = $lang) and ((not(@type) and not($type)) or @type = $type) and (@format = 'rss' or @format = 'rdf')])">
+        <feed format="rss">
+          <xsl:if test="@lang">
+            <xsl:attribute name="lang">
+              <xsl:value-of select="@lang" />
+            </xsl:attribute>
+          </xsl:if>
+          <xsl:if test="@type">
+            <xsl:attribute name="type">
+              <xsl:value-of select="@type" />
+            </xsl:attribute>
+          </xsl:if>
+          <xsl:attribute name="id">
+            <xsl:value-of select="@id" />
+            <xsl:text>-rss</xsl:text>
           </xsl:attribute>
-        </xsl:if>
-        <xsl:if test="@type">
-          <xsl:attribute name="type">
-            <xsl:value-of select="@type" />
-          </xsl:attribute>
-        </xsl:if>
-        <xsl:attribute name="id">
-          <xsl:value-of select="@id" />
-          <xsl:text>-2rss</xsl:text>
-        </xsl:attribute>
-        <xsl:attribute name="format">rss</xsl:attribute>
 
-        <xsl:choose>
-          <xsl:when test="itsb:output">
-            <shell>
-              <xsl:text>cat $DIR/feeds/</xsl:text>
-              <xsl:value-of select="itsb:output/text()" />
-            </shell>
-          </xsl:when>
-          <xsl:otherwise>
-            <curl>
-              <url>
-                <xsl:value-of select="itsb:link/text()" />
-              </url>
-            </curl>
-          </xsl:otherwise>
-        </xsl:choose>
-
-        <xml2json />
-        <jq path="convert/atom2rss.jq" />
-        <json2xml />
-
-        <output>
-          <xsl:text>_rss/</xsl:text>
           <xsl:choose>
             <xsl:when test="itsb:output">
-              <xsl:value-of select="itsb:output/text()" />
+              <shell>
+                <xsl:text>cat $DIR/feeds/</xsl:text>
+                <xsl:value-of select="itsb:output/text()" />
+              </shell>
             </xsl:when>
             <xsl:otherwise>
-              <xsl:value-of select="@id" />
-              <xsl:text>.xml</xsl:text>
+              <curl>
+                <url>
+                  <xsl:value-of select="itsb:link/text()" />
+                </url>
+              </curl>
             </xsl:otherwise>
           </xsl:choose>
-        </output>
-      </feed>
-    </xsl:if>
+
+          <xml2json />
+          <jq path="convert/atom2rss.jq" />
+          <json2xml />
+
+          <output>
+            <xsl:text>_rss/</xsl:text>
+            <xsl:choose>
+              <xsl:when test="itsb:output">
+                <xsl:value-of select="itsb:output/text()" />
+              </xsl:when>
+              <xsl:otherwise>
+                <xsl:value-of select="@id" />
+                <xsl:text>.xml</xsl:text>
+              </xsl:otherwise>
+            </xsl:choose>
+          </output>
+        </feed>
+
+        <xsl:call-template name="jsonfeed" />
+      </xsl:when>
+
+      <xsl:when test="@format = 'rss'">
+        <xsl:call-template name="jsonfeed" />
+      </xsl:when>
+    </xsl:choose>
   </xsl:template>
 
+  <xsl:template name="jsonfeed">
+    <feed format="json">
+      <xsl:if test="@lang">
+        <xsl:attribute name="lang">
+          <xsl:value-of select="@lang" />
+        </xsl:attribute>
+      </xsl:if>
+      <xsl:if test="@type">
+        <xsl:attribute name="type">
+          <xsl:value-of select="@type" />
+        </xsl:attribute>
+      </xsl:if>
+      <xsl:attribute name="id">
+        <xsl:value-of select="@id" />
+        <xsl:text>-json</xsl:text>
+      </xsl:attribute>
+
+      <xsl:choose>
+        <xsl:when test="itsb:output">
+          <shell>
+            <xsl:text>cat $DIR/feeds/</xsl:text>
+            <xsl:value-of select="itsb:output/text()" />
+          </shell>
+        </xsl:when>
+        <xsl:otherwise>
+          <curl>
+            <url>
+              <xsl:value-of select="itsb:link/text()" />
+            </url>
+          </curl>
+        </xsl:otherwise>
+      </xsl:choose>
+
+      <xml2json />
+      <jq>
+        <xsl:attribute name="path">
+          <xsl:text>convert/</xsl:text>
+          <xsl:value-of select="@format" />
+          <xsl:text>2jsonfeed.jq</xsl:text>
+        </xsl:attribute>
+        <arg name="feed_url">
+          <xsl:value-of select="$itsbRoot" />
+          <xsl:text>feeds/_json/</xsl:text>
+          <xsl:value-of select="@id" />
+          <xsl:text>.json</xsl:text>
+        </arg>
+      </jq>
+      <output>
+        <xsl:text>_json/</xsl:text>
+        <xsl:value-of select="@id" />
+        <xsl:text>.json</xsl:text>
+      </output>
+    </feed>
+  </xsl:template>
 </xsl:stylesheet>