diff --git a/cmd/config_init.go b/cmd/config_init.go
index 60a0f37b..a8426e7c 100644
--- a/cmd/config_init.go
+++ b/cmd/config_init.go
@@ -42,6 +42,10 @@ override the options.`,
 				Theme:                 mustGetString(flags, "branding.theme"),
 				Files:                 mustGetString(flags, "branding.files"),
 			},
+			OnlyOffice: settings.OnlyOffice{
+				URL:       mustGetString(flags, "onlyoffice.url"),
+				JWTSecret: mustGetString(flags, "onlyoffice.jwtSecret"),
+			},
 		}
 
 		ser := &settings.Server{
diff --git a/cmd/config_set.go b/cmd/config_set.go
index 23ff7e1b..11a40040 100644
--- a/cmd/config_set.go
+++ b/cmd/config_set.go
@@ -63,6 +63,10 @@ you want to change. Other options will remain unchanged.`,
 				set.Branding.DisableUsedPercentage = mustGetBool(flags, flag.Name)
 			case "branding.files":
 				set.Branding.Files = mustGetString(flags, flag.Name)
+			case "onlyoffice.url":
+				set.OnlyOffice.URL = mustGetString(flags, flag.Name)
+			case "onlyoffice.jwtSecret":
+				set.OnlyOffice.JWTSecret = mustGetString(flags, flag.Name)
 			}
 		})
 
diff --git a/files/file.go b/files/file.go
index 03b3a6f9..7d3a695b 100644
--- a/files/file.go
+++ b/files/file.go
@@ -276,6 +276,9 @@ func (i *FileInfo) detectType(modify, saveContent, readHeader bool) error {
 			i.Content = string(content)
 		}
 		return nil
+	case strings.HasPrefix(mimetype, "application/vnd.openxmlformats-officedocument"):
+		i.Type = "officedocument"
+		return nil
 	default:
 		i.Type = "blob"
 	}
diff --git a/frontend/src/i18n/ar.json b/frontend/src/i18n/ar.json
index 0236a9f3..ede9b9c3 100644
--- a/frontend/src/i18n/ar.json
+++ b/frontend/src/i18n/ar.json
@@ -195,6 +195,8 @@
     "newPassword": "كلمة المرور الجديدة",
     "newPasswordConfirm": "تأكيد كلمة المرور",
     "newUser": "مستخدم جديد",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "كلمة المرور",
     "passwordUpdated": "تم تغيير كلمة المرور!",
     "path": "المسار",
diff --git a/frontend/src/i18n/de.json b/frontend/src/i18n/de.json
index 2609a5f3..0c45a09d 100644
--- a/frontend/src/i18n/de.json
+++ b/frontend/src/i18n/de.json
@@ -182,6 +182,8 @@
     "newPassword": "Ihr neues Passwort.",
     "newPasswordConfirm": "Bestätigen Sie Ihr neues Passwort",
     "newUser": "Neuer Benutzer",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Passwort",
     "passwordUpdated": "Passwort aktualisiert!",
     "path": "Pfad",
@@ -247,4 +249,4 @@
     "seconds": "Sekunden",
     "unit": "Zeiteinheit"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/en.json b/frontend/src/i18n/en.json
index 00d43b9d..9127ee72 100644
--- a/frontend/src/i18n/en.json
+++ b/frontend/src/i18n/en.json
@@ -195,6 +195,9 @@
     "newPassword": "Your new password",
     "newPasswordConfirm": "Confirm your new password",
     "newUser": "New User",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
+    "onlyOfficeJwtSecret": "Only Office JWT Secret (works only with https, leave blank to disable)",
     "password": "Password",
     "passwordUpdated": "Password updated!",
     "path": "Path",
@@ -261,4 +264,4 @@
     "seconds": "Seconds",
     "unit": "Time Unit"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/es.json b/frontend/src/i18n/es.json
index 06197a79..43d4dc92 100644
--- a/frontend/src/i18n/es.json
+++ b/frontend/src/i18n/es.json
@@ -182,6 +182,8 @@
     "newPassword": "Tu nueva contraseña",
     "newPasswordConfirm": "Confirma tu contraseña",
     "newUser": "Nuevo usuario",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Contraseña",
     "passwordUpdated": "¡Contraseña actualizada!",
     "path": "Ruta",
@@ -247,4 +249,4 @@
     "seconds": "Segundos",
     "unit": "Unidad"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/fr.json b/frontend/src/i18n/fr.json
index 30725641..d03d26b2 100644
--- a/frontend/src/i18n/fr.json
+++ b/frontend/src/i18n/fr.json
@@ -181,6 +181,8 @@
     "newPassword": "Votre nouveau mot de passe",
     "newPasswordConfirm": "Confirmation du nouveau mot de passe",
     "newUser": "Nouvel Utilisateur",
+    "onlyOffice": "Intégration Only Office",
+    "onlyOfficeUrl": "URL vers OnlyOffice (laisser vide pour désactiver)",
     "password": "Mot de passe",
     "passwordUpdated": "Mot de passe mis à jour !",
     "path": "",
@@ -246,4 +248,4 @@
     "seconds": "Secondes",
     "unit": "Unité de temps"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/is.json b/frontend/src/i18n/is.json
index d53874c8..603aa7b9 100644
--- a/frontend/src/i18n/is.json
+++ b/frontend/src/i18n/is.json
@@ -169,6 +169,8 @@
     "newPassword": "Nýja lykilorðið þitt",
     "newPasswordConfirm": "Staðfestu nýja lykilorðið",
     "newUser": "Nýr notandi",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Lykilorð",
     "passwordUpdated": "Lykilorð vistað!",
     "path": "",
@@ -232,4 +234,4 @@
     "seconds": "Sekúndur",
     "unit": "Tímastilling"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/it.json b/frontend/src/i18n/it.json
index a03c7f42..64451c56 100644
--- a/frontend/src/i18n/it.json
+++ b/frontend/src/i18n/it.json
@@ -170,6 +170,8 @@
     "newPassword": "La tua nuova password",
     "newPasswordConfirm": "Conferma la password",
     "newUser": "Nuovo utente",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Password",
     "passwordUpdated": "Password aggiornata!",
     "path": "Percorso",
@@ -233,4 +235,4 @@
     "seconds": "Secondi",
     "unit": "Unità di tempo"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/ja.json b/frontend/src/i18n/ja.json
index f16a9d16..81634557 100644
--- a/frontend/src/i18n/ja.json
+++ b/frontend/src/i18n/ja.json
@@ -191,6 +191,8 @@
     "newPassword": "新しいパスワード",
     "newPasswordConfirm": "新しいパスワード（再入力）",
     "newUser": "新規ユーザー作成",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "パスワード",
     "passwordUpdated": "パスワードを更新しました！",
     "path": "パス",
@@ -256,4 +258,4 @@
     "seconds": "秒",
     "unit": "時間の単位"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/ko.json b/frontend/src/i18n/ko.json
index 046a712b..7ae3de8c 100644
--- a/frontend/src/i18n/ko.json
+++ b/frontend/src/i18n/ko.json
@@ -169,6 +169,8 @@
     "newPassword": "새로운 비밀번호",
     "newPasswordConfirm": "새로운 비밀번호 확인",
     "newUser": "새로운 사용자",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "비밀번호",
     "passwordUpdated": "비밀번호 수정 완료!",
     "path": "",
@@ -232,4 +234,4 @@
     "seconds": "초",
     "unit": "Time Unit"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/nl-be.json b/frontend/src/i18n/nl-be.json
index 913e48f0..2e94a45a 100644
--- a/frontend/src/i18n/nl-be.json
+++ b/frontend/src/i18n/nl-be.json
@@ -169,6 +169,8 @@
     "newPassword": "Uw nieuw wachtwoord",
     "newPasswordConfirm": "Bevestig uw nieuw wachtwoord",
     "newUser": "Nieuwe gebruiker",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Wachtwoord",
     "passwordUpdated": "Wachtwoord bijgewerkt!",
     "path": "",
@@ -232,4 +234,4 @@
     "seconds": "Seconden",
     "unit": "Tijdseenheid"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/pl.json b/frontend/src/i18n/pl.json
index 9fcd4afa..95ad5fc3 100644
--- a/frontend/src/i18n/pl.json
+++ b/frontend/src/i18n/pl.json
@@ -169,6 +169,8 @@
     "newPassword": "Twoje nowe hasło",
     "newPasswordConfirm": "Potwierdź swoje hasło",
     "newUser": "Nowy Użytkownik",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Hasło",
     "passwordUpdated": "Hasło zostało zapisane!",
     "path": "Ścieżka",
@@ -232,4 +234,4 @@
     "seconds": "Sekundy",
     "unit": "Jednostka czasu"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/pt-br.json b/frontend/src/i18n/pt-br.json
index 53d855d1..f78c3b2b 100644
--- a/frontend/src/i18n/pt-br.json
+++ b/frontend/src/i18n/pt-br.json
@@ -182,6 +182,8 @@
     "newPassword": "Nova senha",
     "newPasswordConfirm": "Confirme a nova senha",
     "newUser": "Novo usuário",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Senha",
     "passwordUpdated": "Senha atualizada!",
     "path": "",
@@ -247,4 +249,4 @@
     "seconds": "Segundos",
     "unit": "Unidades de Tempo"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/pt.json b/frontend/src/i18n/pt.json
index e7cd9efa..47740180 100644
--- a/frontend/src/i18n/pt.json
+++ b/frontend/src/i18n/pt.json
@@ -170,6 +170,8 @@
     "newPassword": "Nova palavra-passe",
     "newPasswordConfirm": "Confirme a nova palavra-passe",
     "newUser": "Novo utilizador",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Palavra-passe",
     "passwordUpdated": "Palavra-passe atualizada!",
     "path": "",
@@ -233,4 +235,4 @@
     "seconds": "Segundos",
     "unit": "Unidades de tempo"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/ro.json b/frontend/src/i18n/ro.json
index 6d564461..068c3c4f 100644
--- a/frontend/src/i18n/ro.json
+++ b/frontend/src/i18n/ro.json
@@ -169,6 +169,8 @@
     "newPassword": "Noua ta parolă",
     "newPasswordConfirm": "Confirmă noua parolă",
     "newUser": "Utilizator nou",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Parola",
     "passwordUpdated": "Parola actualizată!",
     "path": "",
@@ -232,4 +234,4 @@
     "seconds": "Secunde",
     "unit": "Unitate de timp"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/ru.json b/frontend/src/i18n/ru.json
index bb6e8c92..8d261ae9 100644
--- a/frontend/src/i18n/ru.json
+++ b/frontend/src/i18n/ru.json
@@ -177,6 +177,8 @@
     "newPassword": "Новый пароль",
     "newPasswordConfirm": "Повтор нового пароля",
     "newUser": "Новый пользователь",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Пароль",
     "passwordUpdated": "Пароль обновлен!",
     "path": "Путь",
@@ -242,4 +244,4 @@
     "seconds": "Секунды",
     "unit": "Единица времени"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/sv-se.json b/frontend/src/i18n/sv-se.json
index d6bb1676..b53257c6 100644
--- a/frontend/src/i18n/sv-se.json
+++ b/frontend/src/i18n/sv-se.json
@@ -169,6 +169,8 @@
     "newPassword": "Ditt nya lösenord",
     "newPasswordConfirm": "Bekräfta ditt nya lösenord",
     "newUser": "Ny användare",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "Lösenord",
     "passwordUpdated": "Lösenord uppdaterat",
     "path": "",
@@ -232,4 +234,4 @@
     "seconds": "Sekunder",
     "unit": "Tidsenhet"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/zh-cn.json b/frontend/src/i18n/zh-cn.json
index 51801a59..a0ab108c 100644
--- a/frontend/src/i18n/zh-cn.json
+++ b/frontend/src/i18n/zh-cn.json
@@ -191,6 +191,8 @@
     "newPassword": "你的新密码",
     "newPasswordConfirm": "再次输入以确认你的新密码",
     "newUser": "新建用户",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "密码",
     "passwordUpdated": "密码已更新！",
     "path": "路径",
@@ -256,4 +258,4 @@
     "seconds": "秒",
     "unit": "时间单位"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/i18n/zh-tw.json b/frontend/src/i18n/zh-tw.json
index 26da1978..2f176dae 100644
--- a/frontend/src/i18n/zh-tw.json
+++ b/frontend/src/i18n/zh-tw.json
@@ -169,6 +169,8 @@
     "newPassword": "您的新密碼",
     "newPasswordConfirm": "重輸一遍新密碼",
     "newUser": "建立使用者",
+    "onlyOffice": "Only Office Integration",
+    "onlyOfficeUrl": "Only Office URL (leave blank to disable)",
     "password": "密碼",
     "passwordUpdated": "密碼已更新！",
     "path": "",
@@ -232,4 +234,4 @@
     "seconds": "秒",
     "unit": "時間單位"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/utils/constants.ts b/frontend/src/utils/constants.ts
index 3f131b1a..c437b0d2 100644
--- a/frontend/src/utils/constants.ts
+++ b/frontend/src/utils/constants.ts
@@ -18,6 +18,7 @@ const enableExec: boolean = window.FileBrowser.EnableExec;
 const tusSettings = window.FileBrowser.TusSettings;
 const origin = window.location.origin;
 const tusEndpoint = `/api/tus`;
+const onlyOffice = window.FileBrowser.OnlyOffice;
 
 export {
   name,
@@ -39,4 +40,5 @@ export {
   tusSettings,
   origin,
   tusEndpoint,
+  onlyOffice,
 };
diff --git a/frontend/src/views/Files.vue b/frontend/src/views/Files.vue
index 2e82fc6b..ea6196d2 100644
--- a/frontend/src/views/Files.vue
+++ b/frontend/src/views/Files.vue
@@ -37,6 +37,7 @@ import { storeToRefs } from "pinia";
 import { useFileStore } from "@/stores/file";
 import { useLayoutStore } from "@/stores/layout";
 import { useUploadStore } from "@/stores/upload";
+import { onlyOffice } from "@/utils/constants";
 
 import HeaderBar from "@/components/header/HeaderBar.vue";
 import Breadcrumbs from "@/components/Breadcrumbs.vue";
@@ -47,6 +48,7 @@ import FileListing from "@/views/files/FileListing.vue";
 import { StatusError } from "@/api/utils";
 const Editor = defineAsyncComponent(() => import("@/views/files/Editor.vue"));
 const Preview = defineAsyncComponent(() => import("@/views/files/Preview.vue"));
+const OnlyOfficeEditor = defineAsyncComponent(() => import("@/views/files/OnlyOfficeEditor.vue"));
 
 const layoutStore = useLayoutStore();
 const fileStore = useFileStore();
@@ -77,6 +79,8 @@ const currentView = computed(() => {
     fileStore.req.type === "textImmutable"
   ) {
     return Editor;
+  } else if (fileStore.req.type === "officedocument" && onlyOffice !== "") {
+    return OnlyOfficeEditor;
   } else {
     return Preview;
   }
diff --git a/frontend/src/views/files/OnlyOfficeEditor.vue b/frontend/src/views/files/OnlyOfficeEditor.vue
new file mode 100644
index 00000000..bb76dce8
--- /dev/null
+++ b/frontend/src/views/files/OnlyOfficeEditor.vue
@@ -0,0 +1,170 @@
+<template>
+  <div id="editor-container">
+    <header-bar>
+      <action icon="close" :label="$t('buttons.close')" @action="close()" />
+      <title>{{ req.name }}</title>
+    </header-bar>
+
+    <breadcrumbs base="/files" noLink />
+
+    <div id="editor"></div>
+  </div>
+</template>
+
+<style scoped>
+#editor-container {
+  height: 100vh;
+  width: 100vw;
+}
+</style>
+
+<script>
+import { mapState } from "vuex";
+import url from "@/utils/url";
+import { baseURL, onlyOffice } from "@/utils/constants";
+import * as jose from "jose";
+
+import HeaderBar from "@/components/header/HeaderBar.vue";
+import Action from "@/components/header/Action.vue";
+import Breadcrumbs from "@/components/Breadcrumbs.vue";
+
+export default {
+  name: "onlyofficeeditor",
+  components: {
+    HeaderBar,
+    Action,
+    Breadcrumbs,
+  },
+  data: function () {
+    return {};
+  },
+  computed: {
+    ...mapState(["req", "user", "jwt"]),
+    breadcrumbs() {
+      let parts = this.$route.path.split("/");
+
+      if (parts[0] === "") {
+        parts.shift();
+      }
+
+      if (parts[parts.length - 1] === "") {
+        parts.pop();
+      }
+
+      let breadcrumbs = [];
+
+      for (let i = 0; i < parts.length; i++) {
+        breadcrumbs.push({ name: decodeURIComponent(parts[i]) });
+      }
+
+      breadcrumbs.shift();
+
+      if (breadcrumbs.length > 3) {
+        while (breadcrumbs.length !== 4) {
+          breadcrumbs.shift();
+        }
+
+        breadcrumbs[0].name = "...";
+      }
+
+      return breadcrumbs;
+    },
+  },
+  created() {
+    window.addEventListener("keydown", this.keyEvent);
+  },
+  beforeDestroy() {
+    window.removeEventListener("keydown", this.keyEvent);
+    this.editor.destroyEditor();
+  },
+  mounted: function () {
+    let onlyofficeScript = document.createElement("script");
+    onlyofficeScript.setAttribute(
+      "src",
+      `${onlyOffice.url}/web-apps/apps/api/documents/api.js`
+    );
+    document.head.appendChild(onlyofficeScript);
+
+    /*eslint-disable */
+    onlyofficeScript.onload = () => {
+      let fileUrl = `${window.location.protocol}//${window.location.host}${baseURL}/api/raw${url.encodePath(
+        this.req.path
+      )}?auth=${this.jwt}`;
+
+      // create a key from the last modified timestamp and the reversed file path (most specific part first)
+      // replace all special characters (only these symbols are supported: 0-9, a-z, A-Z, -._=)
+      // and truncate it (max length is 20 characters)
+      const key = (
+        Date.parse(this.req.modified).valueOf()
+        + url
+          .encodePath(this.req.path.split('/').reverse().join(''))
+          .replaceAll(/[!~[\]*'()/,;:\-%+. ]/g, "")
+      ).substring(0, 20);
+
+      const config = {
+        document: {
+          fileType: this.req.extension.substring(1),
+          key: key,
+          title: this.req.name,
+          url: fileUrl,
+          permissions: {
+            edit: this.user.perm.modify,
+            download: this.user.perm.download,
+            print: this.user.perm.download
+          }
+        },
+        editorConfig: {
+          callbackUrl: `${window.location.protocol}//${window.location.host}${baseURL}/api/onlyoffice/callback?auth=${this.jwt}&save=${encodeURIComponent(this.req.path)}`,
+          user: {
+            id: this.user.id,
+            name: `User ${this.user.id}`
+          },
+          customization: {
+            autosave: true,
+            forcesave: true
+          },
+          lang: this.user.locale,
+          mode: this.user.perm.modify ? "edit" : "view"
+        }
+      };
+
+      if(onlyOffice.jwtSecret != "") {
+        const alg = 'HS256';
+        new jose.SignJWT(config)
+          .setProtectedHeader({ alg })
+          .sign(new TextEncoder().encode(onlyOffice.jwtSecret)).then((jwt) => {
+            config.token = jwt;
+            this.editor = new DocsAPI.DocEditor("editor", config);
+          })
+      } else {
+        this.editor = new DocsAPI.DocEditor("editor", config);
+      }
+    };
+    /*eslint-enable */
+  },
+  methods: {
+    back() {
+      let uri = url.removeLastDir(this.$route.path) + "/";
+      this.$router.push({ path: uri });
+    },
+    keyEvent(event) {
+      if (!event.ctrlKey && !event.metaKey) {
+        return;
+      }
+
+      if (String.fromCharCode(event.which).toLowerCase() !== "s") {
+        return;
+      }
+
+      event.preventDefault();
+      this.save();
+    },
+    close() {
+      this.$store.commit("updateRequest", {});
+
+      let uri = url.removeLastDir(this.$route.path) + "/";
+      this.$router.push({ path: uri });
+    },
+  },
+};
+</script>
diff --git a/frontend/src/views/settings/Global.vue b/frontend/src/views/settings/Global.vue
index 40a3ec04..1b77e9e5 100644
--- a/frontend/src/views/settings/Global.vue
+++ b/frontend/src/views/settings/Global.vue
@@ -136,6 +136,31 @@
               />
             </p>
           </div>
+
+          <h3>{{ $t("settings.onlyOffice") }}</h3>
+
+          <p>
+            <label for="onlyoffice-url">{{
+              $t("settings.onlyOfficeUrl")
+            }}</label>
+            <input
+              class="input input--block"
+              type="text"
+              v-model="settings.onlyoffice.url"
+              id="onlyoffice-url"
+            />
+          </p>
+          <p>
+            <label for="onlyoffice-jwt">{{
+              $t("settings.onlyOfficeJwtSecret")
+            }}</label>
+            <input
+              class="input input--block"
+              type="text"
+              v-model="settings.onlyoffice.jwtSecret"
+              id="onlyoffice-jwt"
+            />
+          </p>
         </div>
 
         <div class="card-action">
diff --git a/http/http.go b/http/http.go
index 620c43fd..1da832bd 100644
--- a/http/http.go
+++ b/http/http.go
@@ -60,6 +60,8 @@ func NewHandler(
 	users.Handle("/{id:[0-9]+}", monkey(userGetHandler, "")).Methods("GET")
 	users.Handle("/{id:[0-9]+}", monkey(userDeleteHandler, "")).Methods("DELETE")
 
+	api.PathPrefix("/onlyoffice").Handler(monkey(onlyofficeCallbackHandler, "/api/onlyoffice/callback")).Methods("POST")
+
 	api.PathPrefix("/resources").Handler(monkey(resourceGetHandler, "/api/resources")).Methods("GET")
 	api.PathPrefix("/resources").Handler(monkey(resourceDeleteHandler(fileCache), "/api/resources")).Methods("DELETE")
 	api.PathPrefix("/resources").Handler(monkey(resourcePostHandler(fileCache), "/api/resources")).Methods("POST")
diff --git a/http/onlyoffice.go b/http/onlyoffice.go
new file mode 100644
index 00000000..55d6416e
--- /dev/null
+++ b/http/onlyoffice.go
@@ -0,0 +1,64 @@
+package http
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+)
+
+type OnlyOfficeCallback struct {
+	ChangesURL string   `json:"changesurl,omitempty"`
+	Key        string   `json:"key"`
+	Status     int      `json:"status"`
+	URL        string   `json:"url,omitempty"`
+	Users      []string `json:"users,omitempty"`
+	UserData   string   `json:"userdata,omitempty"`
+}
+
+var onlyofficeCallbackHandler = withUser(func(w http.ResponseWriter, r *http.Request, d *data) (int, error) {
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	var data OnlyOfficeCallback
+	err = json.Unmarshal(body, &data)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	if data.Status == 2 || data.Status == 6 {
+		docPath := r.URL.Query().Get("save")
+		if docPath == "" {
+			return http.StatusInternalServerError, errors.New("unable to get file save path")
+		}
+
+		if !d.user.Perm.Modify || !d.Check(docPath) {
+			return http.StatusForbidden, nil
+		}
+
+		doc, err := http.Get(data.URL)
+		if err != nil {
+			return http.StatusInternalServerError, err
+		}
+		defer doc.Body.Close()
+
+		err = d.RunHook(func() error {
+			_, writeErr := writeFile(d.user.Fs, docPath, doc.Body)
+			if writeErr != nil {
+				return writeErr
+			}
+			return nil
+		}, "save", docPath, "", d.user)
+
+		if err != nil {
+			return http.StatusInternalServerError, err
+		}
+	}
+
+	resp := map[string]int{
+		"error": 0,
+	}
+	return renderJSON(w, r, resp)
+})
diff --git a/http/settings.go b/http/settings.go
index de3f22ad..4c294148 100644
--- a/http/settings.go
+++ b/http/settings.go
@@ -18,6 +18,7 @@ type settingsData struct {
 	Tus              settings.Tus          `json:"tus"`
 	Shell            []string              `json:"shell"`
 	Commands         map[string][]string   `json:"commands"`
+	OnlyOffice       settings.OnlyOffice   `json:"onlyoffice"`
 }
 
 var settingsGetHandler = withAdmin(func(w http.ResponseWriter, r *http.Request, d *data) (int, error) {
@@ -31,6 +32,7 @@ var settingsGetHandler = withAdmin(func(w http.ResponseWriter, r *http.Request,
 		Tus:              d.settings.Tus,
 		Shell:            d.settings.Shell,
 		Commands:         d.settings.Commands,
+		OnlyOffice:       d.settings.OnlyOffice,
 	}
 
 	return renderJSON(w, r, data)
@@ -52,6 +54,7 @@ var settingsPutHandler = withAdmin(func(_ http.ResponseWriter, r *http.Request,
 	d.settings.Tus = req.Tus
 	d.settings.Shell = req.Shell
 	d.settings.Commands = req.Commands
+	d.settings.OnlyOffice = req.OnlyOffice
 
 	err = d.store.Settings.Save(d.settings)
 	return errToStatus(err), err
diff --git a/http/static.go b/http/static.go
index 47d828c6..d8f19c4c 100644
--- a/http/static.go
+++ b/http/static.go
@@ -46,6 +46,7 @@ func handleWithStaticData(w http.ResponseWriter, _ *http.Request, d *data, fSys
 		"ResizePreview":         d.server.ResizePreview,
 		"EnableExec":            d.server.EnableExec,
 		"TusSettings":           d.settings.Tus,
+		"OnlyOffice":            d.settings.OnlyOffice,
 	}
 
 	if d.settings.Branding.Files != "" {
diff --git a/settings/onlyoffice.go b/settings/onlyoffice.go
new file mode 100644
index 00000000..1b6cb185
--- /dev/null
+++ b/settings/onlyoffice.go
@@ -0,0 +1,7 @@
+package settings
+
+// OnlyOffice contains the onlyoffice server connection settings of the app.
+type OnlyOffice struct {
+	URL       string `json:"url"`
+	JWTSecret string `json:"jwtSecret"`
+}
diff --git a/settings/settings.go b/settings/settings.go
index 22908396..1ee0b1c1 100644
--- a/settings/settings.go
+++ b/settings/settings.go
@@ -27,6 +27,7 @@ type Settings struct {
 	Commands         map[string][]string `json:"commands"`
 	Shell            []string            `json:"shell"`
 	Rules            []rules.Rule        `json:"rules"`
+	OnlyOffice       OnlyOffice          `json:"onlyoffice"`
 }
 
 // GetRules implements rules.Provider.
diff --git a/test.docx b/test.docx
new file mode 100644
index 00000000..adf9a8c0
Binary files /dev/null and b/test.docx differ