diff --git a/README.md b/README.md
index a1cd6d536..836f43dc5 100644
--- a/README.md
+++ b/README.md
@@ -132,6 +132,7 @@ Developer note: The software implements the [Torznab](https://github.com/Sonarr/
  * 2 Fast 4 You
  * 3D Torrents (3DT) 
  * 3evils
+ * 4thD (4th Dimension)
  * 720pier
  * Abnormal
  * Acid Lounge (A-L)
diff --git a/src/Jackett.Common/Definitions/4thd.yml b/src/Jackett.Common/Definitions/4thd.yml
new file mode 100644
index 000000000..0f9864114
--- /dev/null
+++ b/src/Jackett.Common/Definitions/4thd.yml
@@ -0,0 +1,114 @@
+---
+  site: 4thd
+  name: 4thD
+  description: "4th Dimension is a Private Torrent Tracker for MOVIES / TV / GENERAL"
+  language: en-us
+  encoding: UTF-8
+  type: private
+  links:
+    - https://4thd.xyz/
+
+  caps:
+    categorymappings:
+      - {id: 38, cat: Movies, "Movie Pack"}
+      - {id: 36, cat: Movies, "Movies/Classic Films"}
+      - {id: 13, cat: Movies, "Movies/Documentary"}
+      - {id: 21, cat: Movies/Foreign, "Movies/Foreign"}
+      - {id: 27, cat: Movies/HD, "MoviesHD"}
+      - {id: 29, cat: Movies/SD, "Movies/SD"}
+      - {id: 26, cat: Movies/SD, "Movies/XviD"}
+      - {id: 41, cat: TV/FOREIGN, "Foreign tv"}
+      - {id: 40, cat: TV, "Mini-Series"}
+      - {id: 43, cat: TV/HD, "TV H265"}
+      - {id: 42, cat: TV, "TV Movie"}
+      - {id: 4, cat: TV/HD, "TV/HD-x720"}
+      - {id: 14, cat: TV, "TV/Packs"}
+      - {id: 2, cat: TV/SD, "TV/SD MP4/mkv"}
+      - {id: 31, cat: TV/SD, "TV/XviD"}
+      - {id: 18, cat: PC/Games, "Games/PC"}
+      - {id: 12, cat: Audio/Lossless, "Music/FLAC"}
+      - {id: 15, cat: Audio/MP3, "Music/MP3"}
+      - {id: 37, cat: Audio, "Radio"}
+      - {id: 9, cat: PC/0day, "Apps/PC"}
+      - {id: 34, cat: Audio/Audiobook, "Audiobooks"}
+      - {id: 25, cat: Books/Ebook, "eBooks"}
+
+    modes:
+      search: [q]
+      tv-search: [q, season, ep]
+      movie-search: [q]
+
+  login:
+    path: login.php
+    method: form
+    form: form#loginform
+    inputs:
+      username: "{{ .Config.username }}"
+      password: "{{ .Config.password }}"
+      keeplogged: 1
+    error:
+      - selector: form#loginform .warning
+    test:
+      path: index.php
+      selector: a[href^="logout.php?auth="]
+
+  search:
+    paths:
+      - path: torrents.php
+    inputs:
+    # https://4thd.xyz/torrents.php?order_by=time&order_way=desc&filter_freeleech=1&title=twilight+zone&search_type=1&taglist=&tags_type=0
+      $raw: "{{range .Categories}}filter_cat[{{.}}]=1&{{end}}"
+      order_by: time
+      order_way: desc
+      # 0 all 1 onlyfree
+      filter_freeleech: 0
+      title: "{{ .Keywords }}"
+      search_type: 1
+      taglist: ""
+      tags_type: 0
+    rows:
+      selector: table#torrent_table > tbody > tr.torrent
+    fields:
+      category:
+        selector: td.cats_col div a
+        attribute: href
+        filters:
+          - name: regexp
+            args: "\\[(\\d+)\\]"
+      title:
+        selector: a[href^="torrents.php?id="]
+      details:
+        selector: a[href^="torrents.php?id="]
+        attribute: href
+      download:
+        selector: a[href^="torrents.php?action=download&id="]
+        attribute: href
+      description:
+        selector: div.tags
+      banner:
+        selector: td:nth-child(2) script
+        optional: true
+        filters:
+          - name: regexp
+            args: "src=(.*?)>"
+          - name: re_replace
+            args: ["\\\\", ""]
+      files:
+        selector: td:nth-child(3)
+      date:
+        selector: td:nth-child(5)
+      size:
+        selector: td:nth-child(6)
+      grabs:
+        selector: td:nth-child(7)
+      seeders:
+        selector: td:nth-child(8)
+      leechers:
+        selector: td:nth-child(9)
+      downloadvolumefactor:
+        case:
+          img[src$="/freedownload.gif"]: 0
+          "*": 1
+      uploadvolumefactor:
+        case:
+          "*": 1