diff --git a/src/routes/api/clipper.js b/src/routes/api/clipper.js
index 4e80ebbb0..ec98b31a7 100644
--- a/src/routes/api/clipper.js
+++ b/src/routes/api/clipper.js
@@ -1,7 +1,7 @@
 "use strict";
 
 const attributeService = require('../../services/attributes');
-const cloneService = require('../../services/cloning.js');
+const cloneService = require('../../services/cloning');
 const noteService = require('../../services/notes');
 const dateNoteService = require('../../services/date_notes.js');
 const dateUtils = require('../../services/date_utils');
diff --git a/src/routes/api/cloning.js b/src/routes/api/cloning.js
index 384e76990..75a42e675 100644
--- a/src/routes/api/cloning.js
+++ b/src/routes/api/cloning.js
@@ -1,6 +1,6 @@
 "use strict";
 
-const cloningService = require('../../services/cloning.js');
+const cloningService = require('../../services/cloning');
 
 function cloneNoteToBranch(req) {
     const {noteId, parentBranchId} = req.params;
diff --git a/src/routes/routes.js b/src/routes/routes.js
index 0b906f9f1..430c2bb25 100644
--- a/src/routes/routes.js
+++ b/src/routes/routes.js
@@ -27,7 +27,7 @@ const notesApiRoute = require('./api/notes.js');
 const branchesApiRoute = require('./api/branches.js');
 const attachmentsApiRoute = require('./api/attachments.js');
 const autocompleteApiRoute = require('./api/autocomplete.js');
-const cloningApiRoute = require('./api/cloning.js');
+const cloningApiRoute = require('./api/cloning');
 const revisionsApiRoute = require('./api/revisions');
 const recentChangesApiRoute = require('./api/recent_changes.js');
 const optionsApiRoute = require('./api/options.js');
diff --git a/src/services/backend_script_api.js b/src/services/backend_script_api.js
index ff3e16be5..915dd7637 100644
--- a/src/services/backend_script_api.js
+++ b/src/services/backend_script_api.js
@@ -9,7 +9,7 @@ const config = require('./config');
 const axios = require('axios');
 const dayjs = require('dayjs');
 const xml2js = require('xml2js');
-const cloningService = require('./cloning.js');
+const cloningService = require('./cloning');
 const appInfo = require('./app_info');
 const searchService = require('./search/services/search');
 const SearchContext = require('./search/search_context');
diff --git a/src/services/bulk_actions.js b/src/services/bulk_actions.js
index d894f2188..427b94075 100644
--- a/src/services/bulk_actions.js
+++ b/src/services/bulk_actions.js
@@ -1,7 +1,7 @@
 const log = require('./log');
 const revisionService = require('./revisions');
 const becca = require('../becca/becca');
-const cloningService = require('./cloning.js');
+const cloningService = require('./cloning');
 const branchService = require('./branches');
 const utils = require('./utils');
 const eraseService = require("./erase");
diff --git a/src/services/cloning.js b/src/services/cloning.ts
similarity index 91%
rename from src/services/cloning.js
rename to src/services/cloning.ts
index 2fc15756b..bb21425bc 100644
--- a/src/services/cloning.js
+++ b/src/services/cloning.ts
@@ -7,7 +7,7 @@ const BBranch = require('../becca/entities/bbranch');
 const becca = require('../becca/becca');
 const log = require('./log');
 
-function cloneNoteToParentNote(noteId, parentNoteId, prefix = null) {
+function cloneNoteToParentNote(noteId: string, parentNoteId: string, prefix: string | null = null) {
     if (!(noteId in becca.notes) || !(parentNoteId in becca.notes)) {
         return { success: false, message: 'Note cannot be cloned because either the cloned note or the intended parent is deleted.' };
     }
@@ -43,7 +43,7 @@ function cloneNoteToParentNote(noteId, parentNoteId, prefix = null) {
     };
 }
 
-function cloneNoteToBranch(noteId, parentBranchId, prefix) {
+function cloneNoteToBranch(noteId: string, parentBranchId: string, prefix: string) {
     const parentBranch = becca.getBranch(parentBranchId);
 
     if (!parentBranch) {
@@ -58,7 +58,7 @@ function cloneNoteToBranch(noteId, parentBranchId, prefix) {
     return ret;
 }
 
-function ensureNoteIsPresentInParent(noteId, parentNoteId, prefix) {
+function ensureNoteIsPresentInParent(noteId: string, parentNoteId: string, prefix: string) {
     if (!(noteId in becca.notes)) {
         return { branch: null, success: false, message: `Note '${noteId}' is deleted.` };
     } else if (!(parentNoteId in becca.notes)) {
@@ -89,7 +89,7 @@ function ensureNoteIsPresentInParent(noteId, parentNoteId, prefix) {
     return { branch: branch, success: true };
 }
 
-function ensureNoteIsAbsentFromParent(noteId, parentNoteId) {
+function ensureNoteIsAbsentFromParent(noteId: string, parentNoteId: string) {
     const branchId = sql.getValue(`SELECT branchId FROM branches WHERE noteId = ? AND parentNoteId = ? AND isDeleted = 0`, [noteId, parentNoteId]);
     const branch = becca.getBranch(branchId);
 
@@ -109,7 +109,7 @@ function ensureNoteIsAbsentFromParent(noteId, parentNoteId) {
     }
 }
 
-function toggleNoteInParent(present, noteId, parentNoteId, prefix) {
+function toggleNoteInParent(present: boolean, noteId: string, parentNoteId: string, prefix: string) {
     if (present) {
         return ensureNoteIsPresentInParent(noteId, parentNoteId, prefix);
     }
@@ -118,7 +118,7 @@ function toggleNoteInParent(present, noteId, parentNoteId, prefix) {
     }
 }
 
-function cloneNoteAfter(noteId, afterBranchId) {
+function cloneNoteAfter(noteId: string, afterBranchId: string) {
     if (['_hidden', 'root'].includes(noteId)) {
         return { success: false, message: `Cloning the note '${noteId}' is forbidden.` };
     }
@@ -175,7 +175,7 @@ function cloneNoteAfter(noteId, afterBranchId) {
     return { success: true, branchId: branch.branchId };
 }
 
-module.exports = {
+export = {
     cloneNoteToBranch,
     cloneNoteToParentNote,
     ensureNoteIsPresentInParent,
diff --git a/src/tools/generate_document.js b/src/tools/generate_document.js
index e2eff9bd5..e716e7e01 100644
--- a/src/tools/generate_document.js
+++ b/src/tools/generate_document.js
@@ -8,7 +8,7 @@ const sqlInit = require('../services/sql_init');
 const noteService = require('../services/notes');
 const attributeService = require('../services/attributes');
 const cls = require('../services/cls');
-const cloningService = require('../services/cloning.js');
+const cloningService = require('../services/cloning');
 const loremIpsum = require('lorem-ipsum').loremIpsum;
 
 const noteCount = parseInt(process.argv[2]);