diff --git a/assets/config.json b/assets/config.json
index c5ed8d1..ca26aea 100644
--- a/assets/config.json
+++ b/assets/config.json
@@ -1,12 +1,12 @@
 {
   "bundles": {
     "app": "ts/app.ts",
-    "fm": "js/fm.js",
-    "url-shrinker": "js/url-shrinker.js",
+    "fm": "ts/fm.ts",
+    "url-shrinker": "ts/url-shrinker.ts",
     "layout": "sass/layout.scss",
     "error": "sass/error.scss",
     "logo": "img/logo.svg",
     "logo_png": "img/logox128.png",
     "logo_png_xxl": "img/logox1024.png"
   }
-}
\ No newline at end of file
+}
diff --git a/assets/js/fm.js b/assets/js/fm.js
deleted file mode 100644
index 354424d..0000000
--- a/assets/js/fm.js
+++ /dev/null
@@ -1,131 +0,0 @@
-document.addEventListener('DOMContentLoaded', () => {
-    const form = document.getElementById('upload-form');
-    if (!form) return;
-    const upload = document.getElementById('file-upload');
-    const uploadLink = document.getElementById('file-upload-link');
-
-    const uploadField = document.getElementById('field-upload');
-
-    const neverExpireCheckbox = document.getElementById('field-never_expire');
-    const expireAfterDaysField = document.getElementById('field-expire_after_days');
-
-    const autogenUrlCheckbox = document.getElementById('field-autogen_url');
-    const slugField = document.getElementById('field-slug');
-
-    neverExpireCheckbox.addEventListener('change', () => {
-        expireAfterDaysField.disabled = neverExpireCheckbox.checked;
-    });
-
-    autogenUrlCheckbox.addEventListener('change', () => {
-        slugField.disabled = autogenUrlCheckbox.checked;
-    });
-
-    let uploadForm;
-
-    form.addEventListener('submit', e => {
-        e.preventDefault();
-        if (!uploadForm || uploadForm.isFinished()) {
-            uploadForm = new UploadForm(form, upload, uploadLink, uploadField.files[0].name);
-            uploadForm.updateView();
-            uploadForm.start();
-        }
-    });
-});
-
-function UploadForm(form, upload, uploadLink, fileName) {
-    this.form = form;
-    this.upload = upload;
-    this.uploadLink = uploadLink;
-    this.fileName = fileName;
-    this.progressBar = this.upload.querySelector('.progress-bar');
-    this.progressBarContent = this.progressBar.querySelector('.content');
-    this.status = this.upload.querySelector('.status');
-    this.speed = this.status.querySelector('.speed');
-    this.finished = false;
-
-    this.xferSpeed = [];
-    this.lastTransferTime = null;
-
-    this.xhr = new XMLHttpRequest();
-    this.xhr.responseType = 'json';
-    this.xhr.upload.addEventListener('progress', e => {
-        if (e.lengthComputable) {
-            this.progressBar.classList.remove('undefined');
-            let percent = ((e.loaded / e.total) * 100).toFixed(2) + '%';
-            this.progressBar.style = `--progress: ${percent}`;
-            this.progressBarContent.innerText = percent;
-            this.updateSpeed(e.loaded);
-        } else {
-            this.progressBar.classList.add('undefined');
-        }
-    });
-    this.xhr.upload.addEventListener('loadstart', () => {
-        this.status.classList.remove('hidden');
-    });
-    this.xhr.addEventListener('load', () => {
-        this.finished = true;
-        let response = this.xhr.response;
-        console.log('done', response);
-        if (response.status === 'error') {
-            if (response.messages) {
-                this.restoreView();
-                window.applyFormMessages(this.form, response.messages);
-            }
-        } else if (response.url) {
-            this.status.innerHTML = 'Done!';
-            this.uploadLink.querySelector('.content').innerText = response.url;
-            this.uploadLink.classList.remove('hidden');
-        } else {
-            window.location.reload();
-        }
-    });
-    this.xhr.addEventListener('error', (e) => {
-        this.finished = true;
-        console.error('error', e);
-        this.status.innerHTML = 'Error; upload was interrupted.';
-    });
-}
-
-UploadForm.prototype.isFinished = function () {
-    return this.finished;
-}
-
-UploadForm.prototype.updateView = function () {
-    this.upload.querySelector('.name').innerText = this.fileName;
-    this.form.classList.add('hidden');
-    this.upload.classList.remove('hidden');
-    this.status.innerHTML = `Uploading @ <span class="speed">--</span>`;
-    this.speed = this.status.querySelector('.speed');
-}
-
-UploadForm.prototype.restoreView = function () {
-    this.status.classList.add('hidden');
-    this.upload.classList.add('hidden');
-    this.form.classList.remove('hidden');
-};
-
-UploadForm.prototype.start = function () {
-    const formData = new FormData(this.form);
-    this.xhr.open('POST', this.form.action);
-    this.xhr.send(formData);
-}
-
-const units = ['K', 'M', 'G', 'T'];
-UploadForm.prototype.updateSpeed = function (loaded) {
-    const time = new Date().getTime();
-    if (this.lastTransferTime) {
-        this.xferSpeed.push((loaded - this.lastLoaded) / (time - this.lastTransferTime));
-
-        if (this.xferSpeed.length > 100) this.xferSpeed = this.xferSpeed.slice(1);
-
-        let speed = this.xferSpeed.reduce((v, c) => v + c) / this.xferSpeed.length;
-        let unit = 0;
-        while (speed >= 1000 && unit < units.length - 1) {
-            speed /= 1000;
-            unit++;
-        }
-        this.speed.innerText = (speed).toFixed(2) + units[unit] + 'Bps';
-    }
-    this.lastTransferTime = time;
-    this.lastLoaded = loaded;
-}
diff --git a/assets/js/url-shrinker.js b/assets/js/url-shrinker.js
deleted file mode 100644
index e1e10f5..0000000
--- a/assets/js/url-shrinker.js
+++ /dev/null
@@ -1,11 +0,0 @@
-document.addEventListener('DOMContentLoaded', () => {
-    const form = document.getElementById('url-shrink-form');
-    if (!form) return;
-
-    const autogenUrlCheckbox = document.getElementById('field-autogen_url');
-    const slugField = document.getElementById('field-slug');
-
-    autogenUrlCheckbox.addEventListener('change', () => {
-        slugField.disabled = autogenUrlCheckbox.checked;
-    });
-});
diff --git a/assets/ts/fm.ts b/assets/ts/fm.ts
new file mode 100644
index 0000000..07d0134
--- /dev/null
+++ b/assets/ts/fm.ts
@@ -0,0 +1,171 @@
+import {applyFormMessages} from "./forms";
+
+document.addEventListener('DOMContentLoaded', () => {
+    const form = document.querySelector<HTMLFormElement>('#upload-form');
+    if (!form) return;
+    const upload = document.getElementById('file-upload');
+    const uploadLink = document.querySelector<HTMLLinkElement>('#file-upload-link');
+
+    const uploadField = document.querySelector<HTMLInputElement>('#field-upload');
+
+    const neverExpireCheckbox = document.querySelector<HTMLInputElement>('#field-never_expire');
+    const expireAfterDaysField = document.querySelector<HTMLInputElement>('#field-expire_after_days');
+
+    const autogenUrlCheckbox = document.querySelector<HTMLInputElement>('#field-autogen_url');
+    const slugField = document.querySelector<HTMLInputElement>('#field-slug');
+
+    if (expireAfterDaysField) {
+        neverExpireCheckbox?.addEventListener('change', () => {
+            expireAfterDaysField.disabled = neverExpireCheckbox.checked;
+        });
+    }
+
+    if (slugField) {
+        autogenUrlCheckbox?.addEventListener('change', () => {
+            slugField.disabled = autogenUrlCheckbox.checked;
+        });
+    }
+
+    let uploadForm: UploadForm | undefined;
+
+    form.addEventListener('submit', e => {
+        e.preventDefault();
+        if (upload && uploadLink && uploadField && uploadField.files && (!uploadForm || uploadForm.isFinished())) {
+            uploadForm = new UploadForm(form, upload, uploadLink, uploadField.files[0].name);
+            uploadForm.updateView();
+            uploadForm.start();
+        }
+    });
+});
+
+
+const units = ['K', 'M', 'G', 'T'];
+
+class UploadForm {
+    private finished: boolean = false;
+    private readonly progressBar: HTMLElement | null;
+    private readonly progressBarContent: HTMLElement | null;
+    private readonly status: HTMLElement | null;
+    private speed: HTMLElement | null;
+    private xferSpeed: number[] = [];
+    private lastTransferTime: number | null = null;
+    private lastLoaded: number = 0;
+
+    private xhr: XMLHttpRequest;
+
+    public constructor(
+        private form: HTMLFormElement,
+        private upload: HTMLElement,
+        private uploadLink: HTMLLinkElement,
+        private fileName: string,
+    ) {
+        this.progressBar = this.upload.querySelector('.progress-bar');
+        this.progressBarContent = this.progressBar?.querySelector('.content') || null;
+        this.status = this.upload.querySelector('.status');
+        this.speed = this.status?.querySelector('.speed') || null;
+
+        if (!this.progressBar)
+            throw new Error('Invalid html');
+
+        this.xhr = new XMLHttpRequest();
+        this.xhr.responseType = 'json';
+        this.xhr.upload.addEventListener('progress', e => {
+            if (this.progressBar && this.progressBarContent) {
+                if (e.lengthComputable) {
+                    this.progressBar.classList.remove('undefined');
+                    const percent = (e.loaded / e.total * 100).toFixed(2) + '%';
+                    this.progressBar.style.setProperty('--progress', `${percent}`);
+                    this.progressBarContent.innerText = percent;
+                    this.updateSpeed(e.loaded);
+                } else {
+                    this.progressBar.classList.add('undefined');
+                }
+            }
+        });
+        this.xhr.upload.addEventListener('loadstart', () => {
+            this.status?.classList.remove('hidden');
+        });
+        this.xhr.addEventListener('load', () => {
+            this.finished = true;
+            const response = this.xhr.response;
+            console.log('done', response);
+            if (response.status === 'error') {
+                if (response.messages) {
+                    this.restoreView();
+                    applyFormMessages(this.form, response.messages);
+                }
+            } else if (response.url) {
+                if (this.status) {
+                    this.status.innerHTML = 'Done!';
+                }
+                const uploadLinkContent = this.uploadLink.querySelector<HTMLElement>('.content');
+                if (uploadLinkContent) {
+                    uploadLinkContent.innerText = response.url;
+                }
+                this.uploadLink.classList.remove('hidden');
+            } else {
+                window.location.reload();
+            }
+        });
+        this.xhr.addEventListener('error', (e) => {
+            this.finished = true;
+            console.error('error', e);
+            if (this.status) {
+                this.status.innerHTML = 'Error; upload was interrupted.';
+            }
+        });
+    }
+
+    public isFinished(): boolean {
+        return this.finished;
+    }
+
+    public updateView(): void {
+        const uploadName = this.upload.querySelector<HTMLElement>('.name');
+        if (uploadName) {
+            uploadName.innerText = this.fileName;
+        }
+        this.form.classList.add('hidden');
+        this.upload.classList.remove('hidden');
+        if (this.status) {
+            this.status.innerHTML = `Uploading @ <span class="speed">--</span>`;
+            this.speed = this.status.querySelector('.speed');
+        }
+    }
+
+    public restoreView(): void {
+        if (this.status) {
+            this.status.classList.add('hidden');
+        }
+        this.upload.classList.add('hidden');
+        this.form.classList.remove('hidden');
+    }
+
+    public start(): void {
+        const formData = new FormData(this.form);
+        this.xhr.open('POST', this.form.action);
+        this.xhr.send(formData);
+    }
+
+    public updateSpeed(loaded: number): void {
+        const time = new Date().getTime();
+        if (this.lastTransferTime) {
+            this.xferSpeed.push((loaded - this.lastLoaded) / (time - this.lastTransferTime));
+
+            if (this.xferSpeed.length > 100) this.xferSpeed = this.xferSpeed.slice(1);
+
+            let speed = this.xferSpeed.reduce((v, c) => v + c) / this.xferSpeed.length;
+            let unit = 0;
+            while (speed >= 1000 && unit < units.length - 1) {
+                speed /= 1000;
+                unit++;
+            }
+
+            if (this.speed) {
+                this.speed.innerText = speed.toFixed(2) + units[unit] + 'Bps';
+            }
+        }
+        this.lastTransferTime = time;
+        this.lastLoaded = loaded;
+    }
+}
diff --git a/assets/ts/url-shrinker.ts b/assets/ts/url-shrinker.ts
new file mode 100644
index 0000000..439e3d6
--- /dev/null
+++ b/assets/ts/url-shrinker.ts
@@ -0,0 +1,13 @@
+document.addEventListener('DOMContentLoaded', () => {
+    const form = document.getElementById('url-shrink-form');
+    if (!form) return;
+
+    const autogenUrlCheckbox = document.querySelector<HTMLInputElement>('#field-autogen_url');
+    const slugField = document.querySelector<HTMLInputElement>('#field-slug');
+
+    if (slugField) {
+        autogenUrlCheckbox?.addEventListener('change', () => {
+            slugField.disabled = autogenUrlCheckbox.checked;
+        });
+    }
+});