diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index be006de9..8c8475ee 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,6 +8,6 @@ updates:
     groups:
       github-actions:
         patterns:
-          - "*"  # Group all Actions updates into a single larger pull request
+          - '*' # Group all Actions updates into a single larger pull request
     schedule:
       interval: weekly
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 2da594ed..d3c18b99 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -68,6 +68,10 @@ jobs:
         run: |
           pnpm install && pnpm setup-vendors
 
+      - name: run format check
+        run: |
+          pnpm format:check || (pnpm format && git diff && exit 1)
+
       - name: run tests
         working-directory: apps/readest-app
         run: |
diff --git a/.prettierignore b/.prettierignore
index e70b52f2..2cbb8eaa 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1 +1,34 @@
-packages/foliate-js/
\ No newline at end of file
+# Dependencies
+node_modules
+pnpm-lock.yaml
+
+# Build Artifacts (Web & Rust)
+.next
+.open-next
+.build
+.tauri
+out
+build
+dist
+target
+fastlane
+.wrangler
+
+# Autogenerated Tauri files
+gen
+**/autogenerated
+**/schemas
+
+# Submodules (External Repos)
+packages
+
+# Vendored Assets (Generated/External Code)
+apps/readest-app/public/*.js
+apps/readest-app/public/vendor
+
+# Environment & Editor
+.env
+.env.*
+.vscode
+.idea
+*.log
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 74cfcb5e..f0d8e61d 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -13,4 +13,19 @@
   "javascript.validate.enable": false,
   "javascript.format.enable": false,
   "typescript.format.enable": false,
-}
\ No newline at end of file
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": "explicit"
+  },
+  "[css]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+  "[typescript]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+  "[typescriptreact]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+  "prettier.requireConfig": true,
+  "prettier.documentSelectors": ["**/*.{js,jsx,ts,tsx,css,json,md,html,yml}"]
+}
diff --git a/apps/readest-app/extensions/windows-thumbnail/README.md b/apps/readest-app/extensions/windows-thumbnail/README.md
index 52eba5ac..25d34e93 100644
--- a/apps/readest-app/extensions/windows-thumbnail/README.md
+++ b/apps/readest-app/extensions/windows-thumbnail/README.md
@@ -12,28 +12,31 @@ This crate provides Windows Explorer thumbnail support for eBook files when Read
 
 ## Supported Formats
 
-| Format | Extension | Cover Source |
-|--------|-----------|--------------|
-| EPUB | `.epub` | OPF manifest cover reference |
-| MOBI/AZW | `.mobi`, `.azw`, `.prc` | EXTH cover offset |
-| AZW3/KF8 | `.azw3`, `.kf8` | KF8 format cover |
-| FB2 | `.fb2` | `<binary>` coverpage element |
-| Comic Book | `.cbz`, `.cbr` | First image in archive |
-| Plain Text | `.txt` | Generated placeholder |
+| Format     | Extension               | Cover Source                 |
+| ---------- | ----------------------- | ---------------------------- |
+| EPUB       | `.epub`                 | OPF manifest cover reference |
+| MOBI/AZW   | `.mobi`, `.azw`, `.prc` | EXTH cover offset            |
+| AZW3/KF8   | `.azw3`, `.kf8`         | KF8 format cover             |
+| FB2        | `.fb2`                  | `<binary>` coverpage element |
+| Comic Book | `.cbz`, `.cbr`          | First image in archive       |
+| Plain Text | `.txt`                  | Generated placeholder        |
 
 ## Building
 
 ### Library Only
+
 ```bash
 cargo build --release
 ```
 
 ### COM DLL (for Windows Explorer integration)
+
 ```bash
 cargo build --release --features com
 ```
 
 ### CLI Tool
+
 ```bash
 cargo build --release --features cli
 ```
diff --git a/apps/readest-app/package.json b/apps/readest-app/package.json
index 43d7a46e..f34011ab 100644
--- a/apps/readest-app/package.json
+++ b/apps/readest-app/package.json
@@ -15,6 +15,8 @@
     "test": "dotenv -e .env -e .env.test.local vitest",
     "tauri": "tauri",
     "clippy": "cargo clippy -p Readest --no-deps -- -D warnings",
+    "format": "pnpm -w format",
+    "format:check": "pnpm -w format:check",
     "prepare-public-vendor": "mkdirp ./public/vendor/pdfjs ./public/vendor/simplecc",
     "copy-pdfjs-js": "cpx \"../../packages/foliate-js/node_modules/pdfjs-dist/legacy/build/{pdf.worker.min.mjs,pdf.min.mjs,pdf.d.mts}\" ./public/vendor/pdfjs",
     "copy-pdfjs-wasm": "cpx \"../../packages/foliate-js/node_modules/pdfjs-dist/wasm/{openjpeg.wasm,qcms_bg.wasm}\" ./public/vendor/pdfjs",
diff --git a/apps/readest-app/src/app/reader/hooks/useBooknotesNav.ts b/apps/readest-app/src/app/reader/hooks/useBooknotesNav.ts
index a847b7d1..7fc4960c 100644
--- a/apps/readest-app/src/app/reader/hooks/useBooknotesNav.ts
+++ b/apps/readest-app/src/app/reader/hooks/useBooknotesNav.ts
@@ -103,14 +103,7 @@ export function useBooknotesNav(bookKey: string, toc: TOCItem[]) {
         getView(bookKey)?.goTo(sorted[0]!.cfi);
       }
     },
-    [
-      allBooknotes,
-      bookKey,
-      setActiveBooknoteType,
-      setBooknoteResults,
-      setBooknoteIndex,
-      getView,
-    ],
+    [allBooknotes, bookKey, setActiveBooknoteType, setBooknoteResults, setBooknoteIndex, getView],
   );
 
   const handleShowResults = useCallback(() => {
diff --git a/apps/readest-app/src/services/translators/providers/yandex.ts b/apps/readest-app/src/services/translators/providers/yandex.ts
index 6c1810cf..23a90534 100644
--- a/apps/readest-app/src/services/translators/providers/yandex.ts
+++ b/apps/readest-app/src/services/translators/providers/yandex.ts
@@ -24,27 +24,26 @@ async function translateSingleTextForService(
       lang: lang,
       service: service,
       text: text,
-    })
+    }),
   };
 
   const response = await fetchImpl(url, request);
 
   if (!response.ok) {
     const response_json = JSON.stringify(await response.json());
-    throw new Error(`${service} failed with status ${response.status}\n${text.length}\n${JSON.stringify(request)}\n${response_json}`);
+    throw new Error(
+      `${service} failed with status ${response.status}\n${text.length}\n${JSON.stringify(request)}\n${response_json}`,
+    );
   }
 
   const data = await response.json();
-  if (
-    data &&
-    Array.isArray(data.translations)
-  ) {
+  if (data && Array.isArray(data.translations)) {
     return data.translations;
   } else {
     // fallback: return original texts if translation failed
     return [text];
   }
-};
+}
 
 export const yandexProvider: TranslationProvider = {
   name: 'yandex',
@@ -60,18 +59,21 @@ export const yandexProvider: TranslationProvider = {
       - yandextranslate
       - yandexbrowser
     */
-    const service = "yandexgpt";
+    const service = 'yandexgpt';
 
     // Yandex does not accept "auto" language
-    const source_lang = sourceLang == "AUTO" ? "en" : normalizeToShortLang(sourceLang).toLowerCase();
+    const source_lang =
+      sourceLang == 'AUTO' ? 'en' : normalizeToShortLang(sourceLang).toLowerCase();
     const target_lang = normalizeToShortLang(targetLang).toLowerCase();
     const lang = `${source_lang}-${target_lang}`;
 
-    const responses = await Promise.all(texts.map(async text => {
-      return await translateSingleTextForService(text, lang, service)
-    }));
+    const responses = await Promise.all(
+      texts.map(async (text) => {
+        return await translateSingleTextForService(text, lang, service);
+      }),
+    );
 
     const translatedTexts = responses.flat();
     return translatedTexts;
-  }
+  },
 };
diff --git a/apps/readest-app/src/services/webAppService.ts b/apps/readest-app/src/services/webAppService.ts
index 182bc490..72a76eb8 100644
--- a/apps/readest-app/src/services/webAppService.ts
+++ b/apps/readest-app/src/services/webAppService.ts
@@ -322,7 +322,11 @@ export class WebAppService extends BaseAppService {
     throw new Error('selectFiles is not supported in browser');
   }
 
-  async saveFile(filename: string, content: string | ArrayBuffer, mimeType?: string): Promise<boolean> {
+  async saveFile(
+    filename: string,
+    content: string | ArrayBuffer,
+    mimeType?: string,
+  ): Promise<boolean> {
     try {
       const blob = new Blob([content], { type: mimeType || 'application/octet-stream' });
       const url = URL.createObjectURL(blob);
diff --git a/apps/readest-app/src/types/error.ts b/apps/readest-app/src/types/error.ts
index 8b137891..e69de29b 100644
--- a/apps/readest-app/src/types/error.ts
+++ b/apps/readest-app/src/types/error.ts
@@ -1 +0,0 @@
-
diff --git a/apps/readest-app/src/utils/r2.ts b/apps/readest-app/src/utils/r2.ts
index 6dc123c7..84fdb682 100644
--- a/apps/readest-app/src/utils/r2.ts
+++ b/apps/readest-app/src/utils/r2.ts
@@ -15,18 +15,18 @@ export const r2Storage = {
     return `https://${R2_ACCOUNT_ID}.r2.cloudflarestorage.com`;
   },
 
-  getDownloadSignedUrl: async (
-    bucketName: string,
-    fileKey: string,
-    expiresIn: number,
-  ) => {
+  getDownloadSignedUrl: async (bucketName: string, fileKey: string, expiresIn: number) => {
     return (
-      await r2Storage.getR2Client().sign(
-        new Request(`${r2Storage.getR2Url()}/${bucketName}/${fileKey}?X-Amz-Expires=${expiresIn}`),
-        {
-          aws: { signQuery: true },
-        },
-      )
+      await r2Storage
+        .getR2Client()
+        .sign(
+          new Request(
+            `${r2Storage.getR2Url()}/${bucketName}/${fileKey}?X-Amz-Expires=${expiresIn}`,
+          ),
+          {
+            aws: { signQuery: true },
+          },
+        )
     ).url.toString();
   },
 
diff --git a/apps/readest-app/src/utils/s3.ts b/apps/readest-app/src/utils/s3.ts
index 723a0d88..da9f31fa 100644
--- a/apps/readest-app/src/utils/s3.ts
+++ b/apps/readest-app/src/utils/s3.ts
@@ -17,7 +17,6 @@ export const s3Client = new S3Client({
   },
 });
 
-
 export const s3Storage = {
   getClient: () => {
     return new S3Client({
@@ -31,12 +30,7 @@ export const s3Storage = {
     });
   },
 
-  getDownloadSignedUrl: async (
-    bucketName: string,
-    fileKey: string,
-    expiresIn: number,
-  ) => {
-
+  getDownloadSignedUrl: async (bucketName: string, fileKey: string, expiresIn: number) => {
     const getCommand = new GetObjectCommand({
       Bucket: bucketName,
       Key: fileKey,
@@ -53,7 +47,6 @@ export const s3Storage = {
     contentLength: number,
     expiresIn: number,
   ) => {
-
     const signableHeaders = new Set<string>();
     signableHeaders.add('content-length');
     const putCommand = new PutObjectCommand({
diff --git a/apps/readest-app/tsconfig.json b/apps/readest-app/tsconfig.json
index 87c7b867..aee1067d 100644
--- a/apps/readest-app/tsconfig.json
+++ b/apps/readest-app/tsconfig.json
@@ -2,12 +2,7 @@
   "extends": "@sindresorhus/tsconfig",
   "compilerOptions": {
     "target": "ES2022",
-    "lib": [
-      "dom",
-      "dom.iterable",
-      "webworker",
-      "esnext"
-    ],
+    "lib": ["dom", "dom.iterable", "webworker", "esnext"],
     "allowJs": true,
     "skipLibCheck": true,
     "strict": true,
@@ -25,25 +20,11 @@
       }
     ],
     "paths": {
-      "@/*": [
-        "./src/*"
-      ],
-      "@pdfjs/*": [
-        "./public/vendor/pdfjs/*"
-      ],
-      "@simplecc/*": [
-        "./public/vendor/simplecc/*"
-      ]
+      "@/*": ["./src/*"],
+      "@pdfjs/*": ["./public/vendor/pdfjs/*"],
+      "@simplecc/*": ["./public/vendor/simplecc/*"]
     }
   },
-  "include": [
-    "next-env.d.ts",
-    "**/*.ts",
-    "**/*.tsx",
-    "raw-loader.d.ts",
-    ".next/types/**/*.ts"
-  ],
-  "exclude": [
-    "node_modules",
-  ]
-}
\ No newline at end of file
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", "raw-loader.d.ts", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}
diff --git a/package.json b/package.json
index ce462eb2..d203180f 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,9 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "tauri": "pnpm --filter @readest/readest-app tauri",
-    "dev-web": "pnpm --filter @readest/readest-app dev-web"
+    "dev-web": "pnpm --filter @readest/readest-app dev-web",
+    "format": "prettier --write \"**/*.{js,jsx,ts,tsx,css,json,md,html,yml}\"",
+    "format:check": "prettier --check \"**/*.{js,jsx,ts,tsx,css,json,md,html,yml}\""
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.1",
diff --git a/tsconfig.json b/tsconfig.json
index 08d42c9e..dc491d9c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,12 +8,12 @@
     "strict": true,
     "moduleResolution": "bundler",
     "esModuleInterop": true,
-    "skipLibCheck": true,
+    "skipLibCheck": true
   },
   "files": [],
   "references": [
     {
       "path": "./apps/readest-app"
-    },
+    }
   ]
-}
\ No newline at end of file
+}