From 94c1acd7ce739372c42ddb7df8132220829460d6 Mon Sep 17 00:00:00 2001
From: "Ibrahima G. Coulibaly" <ibracool99@gmail.com>
Date: Fri, 13 Jun 2025 03:35:45 +0100
Subject: [PATCH] feat: unlock pdf init

---
 .idea/workspace.xml                       | 146 +++++++++--------
 src/lib/ghostscript/background-worker.js  | 181 +++++++++++++++++++++-
 src/lib/ghostscript/worker-init.ts        |  14 ++
 src/pages/tools/pdf/index.ts              |   4 +-
 src/pages/tools/pdf/unlock-pdf/index.tsx  | 109 +++++++++++++
 src/pages/tools/pdf/unlock-pdf/meta.ts    |  24 +++
 src/pages/tools/pdf/unlock-pdf/service.ts |  23 +++
 src/pages/tools/pdf/unlock-pdf/types.ts   |   5 +
 8 files changed, 436 insertions(+), 70 deletions(-)
 create mode 100644 src/pages/tools/pdf/unlock-pdf/index.tsx
 create mode 100644 src/pages/tools/pdf/unlock-pdf/meta.ts
 create mode 100644 src/pages/tools/pdf/unlock-pdf/service.ts
 create mode 100644 src/pages/tools/pdf/unlock-pdf/types.ts

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index f8c40cc..1d0b66f 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,8 +4,15 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="b30e2810-c4c1-4aad-b134-794e52cc1c7d" name="Changes" comment="feat: qr code generation init">
-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
+    <list default="true" id="b30e2810-c4c1-4aad-b134-794e52cc1c7d" name="Changes" comment="feat: unlock pdf init">
+      <change afterPath="$PROJECT_DIR$/src/pages/tools/pdf/unlock-pdf/index.tsx" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/pages/tools/pdf/unlock-pdf/meta.ts" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/pages/tools/pdf/unlock-pdf/service.ts" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/pages/tools/pdf/unlock-pdf/types.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/lib/ghostscript/background-worker.js" beforeDir="false" afterPath="$PROJECT_DIR$/src/lib/ghostscript/background-worker.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/lib/ghostscript/worker-init.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/lib/ghostscript/worker-init.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/pages/tools/pdf/index.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/pages/tools/pdf/index.ts" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -22,7 +29,7 @@
     <option name="PUSH_AUTO_UPDATE" value="true" />
     <option name="RECENT_BRANCH_BY_REPOSITORY">
       <map>
-        <entry key="$PROJECT_DIR$" value="76d615ec7c369b7342e0f276392a4cba9c531aef" />
+        <entry key="$PROJECT_DIR$" value="main" />
       </map>
     </option>
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
@@ -199,56 +206,57 @@
     <option name="hideEmptyMiddlePackages" value="true" />
     <option name="showLibraryContents" value="true" />
   </component>
-  <component name="PropertiesComponent">{
-  &quot;keyToString&quot;: {
-    &quot;ASKED_ADD_EXTERNAL_FILES&quot;: &quot;true&quot;,
-    &quot;ASKED_SHARE_PROJECT_CONFIGURATION_FILES&quot;: &quot;true&quot;,
-    &quot;Docker.Dockerfile build.executor&quot;: &quot;Run&quot;,
-    &quot;Docker.Dockerfile.executor&quot;: &quot;Run&quot;,
-    &quot;Playwright.Create transparent PNG.should make png color transparent.executor&quot;: &quot;Run&quot;,
-    &quot;Playwright.JoinText Component.executor&quot;: &quot;Run&quot;,
-    &quot;Playwright.JoinText Component.should merge text pieces with specified join character.executor&quot;: &quot;Run&quot;,
-    &quot;RunOnceActivity.OpenProjectViewOnStart&quot;: &quot;true&quot;,
-    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
-    &quot;RunOnceActivity.git.unshallow&quot;: &quot;true&quot;,
-    &quot;Vitest.compute function (1).executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.compute function.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.mergeText.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.mergeText.should merge lines and preserve blank lines when deleteBlankLines is false.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.mergeText.should merge lines, preserve blank lines and trailing spaces when both deleteBlankLines and deleteTrailingSpaces are false.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.parsePageRanges.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.removeDuplicateLines function.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.removeDuplicateLines function.newlines option.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.removeDuplicateLines function.newlines option.should filter newlines when newlines is set to filter.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.replaceText function (regexp mode).should return the original text when passed an invalid regexp.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.replaceText function.executor&quot;: &quot;Run&quot;,
-    &quot;Vitest.timeBetweenDates.executor&quot;: &quot;Run&quot;,
-    &quot;git-widget-placeholder&quot;: &quot;main&quot;,
-    &quot;ignore.virus.scanning.warn.message&quot;: &quot;true&quot;,
-    &quot;kotlin-language-version-configured&quot;: &quot;true&quot;,
-    &quot;last_opened_file_path&quot;: &quot;C:/Users/Ibrahima/IdeaProjects/omni-tools/src/pages/tools/json&quot;,
-    &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
-    &quot;node.js.detected.package.tslint&quot;: &quot;true&quot;,
-    &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
-    &quot;node.js.selected.package.tslint&quot;: &quot;(autodetect)&quot;,
-    &quot;nodejs_package_manager_path&quot;: &quot;npm&quot;,
-    &quot;npm.build.executor&quot;: &quot;Run&quot;,
-    &quot;npm.dev.executor&quot;: &quot;Run&quot;,
-    &quot;npm.lint.executor&quot;: &quot;Run&quot;,
-    &quot;npm.prebuild.executor&quot;: &quot;Run&quot;,
-    &quot;npm.script:create:tool.executor&quot;: &quot;Run&quot;,
-    &quot;npm.test.executor&quot;: &quot;Run&quot;,
-    &quot;npm.test:e2e.executor&quot;: &quot;Run&quot;,
-    &quot;npm.test:e2e:run.executor&quot;: &quot;Run&quot;,
-    &quot;prettierjs.PrettierConfiguration.Package&quot;: &quot;C:\\Users\\Ibrahima\\IdeaProjects\\omni-tools\\node_modules\\prettier&quot;,
-    &quot;project.structure.last.edited&quot;: &quot;Problems&quot;,
-    &quot;project.structure.proportion&quot;: &quot;0.0&quot;,
-    &quot;project.structure.side.proportion&quot;: &quot;0.2&quot;,
-    &quot;settings.editor.selected.configurable&quot;: &quot;refactai_advanced_settings&quot;,
-    &quot;ts.external.directory.path&quot;: &quot;C:\\Users\\Ibrahima\\IdeaProjects\\omni-tools\\node_modules\\typescript\\lib&quot;,
-    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
+  <component name="PropertiesComponent"><![CDATA[{
+  "keyToString": {
+    "ASKED_ADD_EXTERNAL_FILES": "true",
+    "ASKED_SHARE_PROJECT_CONFIGURATION_FILES": "true",
+    "Docker.Dockerfile build.executor": "Run",
+    "Docker.Dockerfile.executor": "Run",
+    "Playwright.Create transparent PNG.should make png color transparent.executor": "Run",
+    "Playwright.JoinText Component.executor": "Run",
+    "Playwright.JoinText Component.should merge text pieces with specified join character.executor": "Run",
+    "RunOnceActivity.OpenProjectViewOnStart": "true",
+    "RunOnceActivity.ShowReadmeOnStart": "true",
+    "RunOnceActivity.git.unshallow": "true",
+    "Vitest.compute function (1).executor": "Run",
+    "Vitest.compute function.executor": "Run",
+    "Vitest.mergeText.executor": "Run",
+    "Vitest.mergeText.should merge lines and preserve blank lines when deleteBlankLines is false.executor": "Run",
+    "Vitest.mergeText.should merge lines, preserve blank lines and trailing spaces when both deleteBlankLines and deleteTrailingSpaces are false.executor": "Run",
+    "Vitest.parsePageRanges.executor": "Run",
+    "Vitest.removeDuplicateLines function.executor": "Run",
+    "Vitest.removeDuplicateLines function.newlines option.executor": "Run",
+    "Vitest.removeDuplicateLines function.newlines option.should filter newlines when newlines is set to filter.executor": "Run",
+    "Vitest.replaceText function (regexp mode).should return the original text when passed an invalid regexp.executor": "Run",
+    "Vitest.replaceText function.executor": "Run",
+    "Vitest.timeBetweenDates.executor": "Run",
+    "git-widget-placeholder": "unlock-pdf",
+    "ignore.virus.scanning.warn.message": "true",
+    "kotlin-language-version-configured": "true",
+    "last_opened_file_path": "C:/Users/Ibrahima/IdeaProjects/omni-tools/src/pages/tools/pdf",
+    "node.js.detected.package.eslint": "true",
+    "node.js.detected.package.tslint": "true",
+    "node.js.selected.package.eslint": "(autodetect)",
+    "node.js.selected.package.tslint": "(autodetect)",
+    "nodejs_package_manager_path": "npm",
+    "npm.build.executor": "Run",
+    "npm.dev.executor": "Run",
+    "npm.lint.executor": "Run",
+    "npm.prebuild.executor": "Run",
+    "npm.script:create:tool.executor": "Run",
+    "npm.test.executor": "Run",
+    "npm.test:e2e.executor": "Run",
+    "npm.test:e2e:run.executor": "Run",
+    "prettierjs.PrettierConfiguration.Package": "C:\\Users\\Ibrahima\\IdeaProjects\\omni-tools\\node_modules\\prettier",
+    "project.structure.last.edited": "Problems",
+    "project.structure.proportion": "0.0",
+    "project.structure.side.proportion": "0.2",
+    "settings.editor.selected.configurable": "preferences.pluginManager",
+    "ts.external.directory.path": "C:\\Users\\Ibrahima\\IdeaProjects\\omni-tools\\node_modules\\typescript\\lib",
+    "ts.rename.search.for.js.occurrences": "false",
+    "vue.rearranger.settings.migration": "true"
   }
-}</component>
+}]]></component>
   <component name="ReactDesignerToolWindowState">
     <option name="myId2Visible">
       <map>
@@ -260,11 +268,11 @@
   </component>
   <component name="RecentsManager">
     <key name="CopyFile.RECENT_KEYS">
+      <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\src\pages\tools\pdf" />
       <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\src\pages\tools\json" />
       <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\src" />
       <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\@types" />
       <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\public\assets" />
-      <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\src\components\input" />
     </key>
     <key name="MoveFile.RECENT_KEYS">
       <recent name="C:\Users\Ibrahima\IdeaProjects\omni-tools\src\lib\ghostscript" />
@@ -353,11 +361,11 @@
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="npm.dev" />
         <item itemvalue="Vitest.replaceText function (regexp mode).should return the original text when passed an invalid regexp" />
         <item itemvalue="Vitest.parsePageRanges" />
         <item itemvalue="Vitest.timeBetweenDates" />
         <item itemvalue="Vitest.calculateTimeBetweenDates" />
-        <item itemvalue="npm.dev" />
       </list>
     </recent_temporary>
   </component>
@@ -462,14 +470,12 @@
       <workItem from="1748026506667" duration="2536000" />
       <workItem from="1748282636141" duration="478000" />
       <workItem from="1749047510481" duration="879000" />
-    </task>
-    <task id="LOCAL-00152" summary="feat: crop png">
-      <option name="closed" value="true" />
-      <created>1741492688761</created>
-      <option name="number" value="00152" />
-      <option name="presentableId" value="LOCAL-00152" />
-      <option name="project" value="LOCAL" />
-      <updated>1741492688761</updated>
+      <workItem from="1749214774130" duration="1093000" />
+      <workItem from="1749348736119" duration="1186000" />
+      <workItem from="1749471084697" duration="7000" />
+      <workItem from="1749568940505" duration="21000" />
+      <workItem from="1749774497094" duration="1313000" />
+      <workItem from="1749775850632" duration="6240000" />
     </task>
     <task id="LOCAL-00153" summary="chore: remove unnecessary files">
       <option name="closed" value="true" />
@@ -855,7 +861,15 @@
       <option name="project" value="LOCAL" />
       <updated>1749147227565</updated>
     </task>
-    <option name="localTasksCounter" value="201" />
+    <task id="LOCAL-00201" summary="docs: readme">
+      <option name="closed" value="true" />
+      <created>1749348977357</created>
+      <option name="number" value="00201" />
+      <option name="presentableId" value="LOCAL-00201" />
+      <option name="project" value="LOCAL" />
+      <updated>1749348977357</updated>
+    </task>
+    <option name="localTasksCounter" value="202" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -902,8 +916,6 @@
     <option name="CHECK_CODE_SMELLS_BEFORE_PROJECT_COMMIT" value="false" />
     <option name="CHECK_NEW_TODO" value="false" />
     <option name="ADD_EXTERNAL_FILES_SILENTLY" value="true" />
-    <MESSAGE value="fix: gif speed" />
-    <MESSAGE value="fix: tsc" />
     <MESSAGE value="fix: background color" />
     <MESSAGE value="docs: github trendings" />
     <MESSAGE value="docs: optimize" />
@@ -927,7 +939,9 @@
     <MESSAGE value="chore: remove unnecessary prop" />
     <MESSAGE value="fix: compute flow" />
     <MESSAGE value="feat: qr code generation init" />
-    <option name="LAST_COMMIT_MESSAGE" value="feat: qr code generation init" />
+    <MESSAGE value="docs: readme" />
+    <MESSAGE value="feat: unlock pdf init" />
+    <option name="LAST_COMMIT_MESSAGE" value="feat: unlock pdf init" />
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />
diff --git a/src/lib/ghostscript/background-worker.js b/src/lib/ghostscript/background-worker.js
index 3bee269..251d430 100644
--- a/src/lib/ghostscript/background-worker.js
+++ b/src/lib/ghostscript/background-worker.js
@@ -1,4 +1,4 @@
-import { COMPRESS_ACTION, PROTECT_ACTION } from './worker-init';
+import { COMPRESS_ACTION, PROTECT_ACTION, UNLOCK_ACTION } from './worker-init';
 
 function loadScript() {
   import('./gs-worker.js');
@@ -87,7 +87,7 @@ function protectPdf(dataStruct, responseCallback) {
 
   // Validate password
   if (!password) {
-    responseCallback({
+    console.error({
       error: 'Password is required for encryption',
       url: dataStruct.url
     });
@@ -153,6 +153,178 @@ function protectPdf(dataStruct, responseCallback) {
   xhr.send();
 }
 
+function unlockPdf(dataStruct, responseCallback) {
+  const speed = dataStruct.speed || 'normal';
+  let passwordListUrl;
+  console.log('unlockPdf', dataStruct);
+  // Determine which password list to download based on speed
+  if (speed === 'fast') {
+    passwordListUrl =
+      'https://raw.githubusercontent.com/danielmiessler/SecLists/refs/heads/master/Passwords/Common-Credentials/xato-net-10-million-passwords-1000.txt';
+  } else if (speed === 'normal') {
+    passwordListUrl =
+      'https://raw.githubusercontent.com/danielmiessler/SecLists/refs/heads/master/Passwords/Common-Credentials/xato-net-10-million-passwords-100000.txt';
+  } else {
+    // Default or handle other speeds
+    passwordListUrl =
+      'https://raw.githubusercontent.com/danielmiessler/SecLists/refs/heads/master/Passwords/Common-Credentials/xato-net-10-million-passwords-100000.txt';
+  }
+
+  // --- Step 1: Download the password list ---
+  var xhrPasswordList = new XMLHttpRequest();
+  xhrPasswordList.open('GET', passwordListUrl);
+  xhrPasswordList.onload = function () {
+    if (xhrPasswordList.status === 200) {
+      const passwordList = xhrPasswordList.responseText
+        .split('\n')
+        .map((p) => p.trim());
+
+      // --- Step 2: Proceed with PDF processing and dictionary attack ---
+      processPdfWithDictionary(dataStruct, responseCallback, passwordList);
+    } else {
+      console.error(
+        'Failed to download password list:',
+        xhrPasswordList.statusText
+      );
+      console.error('Failed to download password list');
+    }
+  };
+  xhrPasswordList.onerror = function () {
+    console.error('Network error while downloading password list.');
+    console.error('Network error while downloading password list');
+  };
+  xhrPasswordList.send();
+}
+
+function processPdfWithDictionary(dataStruct, responseCallback, passwordList) {
+  var xhrPdf = new XMLHttpRequest();
+  xhrPdf.open('GET', dataStruct.psDataURL);
+  xhrPdf.responseType = 'arraybuffer';
+  xhrPdf.onload = function () {
+    console.log('PDF onload');
+    self.URL.revokeObjectURL(dataStruct.psDataURL);
+
+    let currentPasswordIndex = 0;
+    const tryNextPassword = () => {
+      if (currentPasswordIndex >= passwordList.length) {
+        console.error('All passwords tried. PDF could not be unlocked.');
+        return;
+      }
+
+      const password = passwordList[currentPasswordIndex];
+      console.log(
+        `Attempting with password: "${password}" (${currentPasswordIndex + 1}/${
+          passwordList.length
+        })`
+      );
+
+      Module = {
+        preRun: [
+          function () {
+            self.Module.FS.writeFile(
+              'input.pdf',
+              new Uint8Array(xhrPdf.response)
+            );
+          }
+        ],
+        postRun: [
+          function () {
+            try {
+              var uarray = self.Module.FS.readFile('output.pdf', {
+                encoding: 'binary'
+              });
+              // If readFile succeeds, it means the password was correct
+              var blob = new Blob([uarray], {
+                type: 'application/octet-stream'
+              });
+              var pdfDataURL = self.URL.createObjectURL(blob);
+              console.log(
+                `PDF unlocked successfully with password: "${password}"`
+              );
+              responseCallback({
+                pdfDataURL: pdfDataURL,
+                url: dataStruct.url,
+                type: PROTECT_ACTION
+              });
+            } catch (error) {
+              console.error('Error:', error);
+            }
+          }
+        ],
+        arguments: [
+          '-sDEVICE=pdfwrite',
+          '-dCompatibilityLevel=1.4',
+          `-sPDFPassword=${password}`, // Use the current password from the list
+          '-DNOPAUSE',
+          '-dQUIET',
+          '-dBATCH',
+          '-sOutputFile=output.pdf',
+          'input.pdf'
+        ],
+        print: function (text) {
+          if (text.includes('Error: Password did not work')) {
+            try {
+              if (self.Module && typeof self.Module.exit === 'function') {
+                self.Module.exit(1);
+              }
+              // Clean up any files that might have been created
+              if (self.Module && self.Module.FS) {
+                try {
+                  if (self.Module.FS.readdir('/').includes('input.pdf')) {
+                    self.Module.FS.unlink('input.pdf');
+                  }
+                  if (self.Module.FS.readdir('/').includes('output.pdf')) {
+                    self.Module.FS.unlink('output.pdf');
+                  }
+                } catch (fsError) {
+                  console.log('Filesystem cleanup error:', fsError);
+                }
+              }
+            } catch (exitError) {
+              console.log('Error during module exit:', exitError);
+            }
+
+            currentPasswordIndex++;
+            setTimeout(tryNextPassword, 10); // Small delay to prevent tight loop
+          }
+        },
+        printErr: function (text) {
+          // Ghostscript might print errors here if the password is wrong
+          // We need to parse these to determine if it's a password error or another issue
+          console.error('Ghostscript error:', text);
+        },
+        totalDependencies: 0,
+        noExitRuntime: 1
+      };
+
+      if (!self.Module) {
+        self.Module = Module;
+        loadScript(); // Assuming loadScript() loads the Emscripten-compiled Ghostscript
+      } else {
+        self.Module['calledRun'] = false;
+        self.Module['postRun'] = Module.postRun;
+        self.Module['preRun'] = Module.preRun;
+        self.Module['arguments'] = Module.arguments;
+        self.Module.callMain();
+      }
+    };
+
+    // Start the dictionary attack
+    tryNextPassword();
+  };
+
+  xhrPdf.onerror = function () {
+    console.error('Network error while downloading PDF.');
+  };
+  xhrPdf.send();
+}
+
+// Assuming PROTECT_ACTION and loadScript() are defined elsewhere in your worker/global scope.
+// For example:
+// const PROTECT_ACTION = 'pdf_protection_status';
+// function loadScript() {
+//   importScripts('ghostscript_module.js'); // Or whatever your Emscripten output file is named
+// }
 self.addEventListener('message', function ({ data: e }) {
   console.log('message', e);
   // e.data contains the message sent to the worker.
@@ -160,13 +332,16 @@ self.addEventListener('message', function ({ data: e }) {
     return;
   }
   console.log('Message received from main script', e.data);
-  const responseCallback = ({ pdfDataURL, type }) => {
+  const responseCallback = ({ pdfDataURL, type, log }) => {
     self.postMessage(pdfDataURL);
+    console.log(log);
   };
   if (e.data.type === COMPRESS_ACTION) {
     compressPdf(e.data, responseCallback);
   } else if (e.data.type === PROTECT_ACTION) {
     protectPdf(e.data, responseCallback);
+  } else if (e.data.type === UNLOCK_ACTION) {
+    unlockPdf(e.data, responseCallback);
   }
 });
 
diff --git a/src/lib/ghostscript/worker-init.ts b/src/lib/ghostscript/worker-init.ts
index 9fad88f..88cc6ab 100644
--- a/src/lib/ghostscript/worker-init.ts
+++ b/src/lib/ghostscript/worker-init.ts
@@ -1,5 +1,6 @@
 export const COMPRESS_ACTION = 'compress-pdf';
 export const PROTECT_ACTION = 'protect-pdf';
+export const UNLOCK_ACTION = 'unlock-pdf';
 
 export async function compressWithGhostScript(dataStruct: {
   psDataURL: string;
@@ -14,6 +15,7 @@ export async function compressWithGhostScript(dataStruct: {
 
 export async function protectWithGhostScript(dataStruct: {
   psDataURL: string;
+  password: string;
 }): Promise<string> {
   const worker = getWorker();
   worker.postMessage({
@@ -23,6 +25,18 @@ export async function protectWithGhostScript(dataStruct: {
   return getListener(worker);
 }
 
+export async function unlockWithGhostScript(dataStruct: {
+  psDataURL: string;
+  speed: 'slow' | 'normal' | 'fast';
+}): Promise<string> {
+  const worker = getWorker();
+  worker.postMessage({
+    data: { ...dataStruct, type: UNLOCK_ACTION },
+    target: 'wasm'
+  });
+  return getListener(worker);
+}
+
 const getListener = (worker: Worker): Promise<string> => {
   return new Promise((resolve, reject) => {
     const listener = (e: MessageEvent) => {
diff --git a/src/pages/tools/pdf/index.ts b/src/pages/tools/pdf/index.ts
index c5f294f..ececd28 100644
--- a/src/pages/tools/pdf/index.ts
+++ b/src/pages/tools/pdf/index.ts
@@ -5,6 +5,7 @@ import { DefinedTool } from '@tools/defineTool';
 import { tool as compressPdfTool } from './compress-pdf/meta';
 import { tool as protectPdfTool } from './protect-pdf/meta';
 import { meta as pdfToEpub } from './pdf-to-epub/meta';
+import { meta as unlockPdfTool } from './unlock-pdf/meta';
 
 export const pdfTools: DefinedTool[] = [
   splitPdfMeta,
@@ -12,5 +13,6 @@ export const pdfTools: DefinedTool[] = [
   compressPdfTool,
   protectPdfTool,
   mergePdf,
-  pdfToEpub
+  pdfToEpub,
+  unlockPdfTool
 ];
diff --git a/src/pages/tools/pdf/unlock-pdf/index.tsx b/src/pages/tools/pdf/unlock-pdf/index.tsx
new file mode 100644
index 0000000..af5f73f
--- /dev/null
+++ b/src/pages/tools/pdf/unlock-pdf/index.tsx
@@ -0,0 +1,109 @@
+import React, { useContext, useState } from 'react';
+import ToolContent from '@components/ToolContent';
+import { ToolComponentProps } from '@tools/defineTool';
+import ToolPdfInput from '@components/input/ToolPdfInput';
+import ToolFileResult from '@components/result/ToolFileResult';
+import { InitialValuesType, Speed } from './types';
+import { unlockPdf } from './service';
+import { CustomSnackBarContext } from '../../../../contexts/CustomSnackBarContext';
+import RadioWithTextField from '@components/options/RadioWithTextField';
+import SimpleRadio from '@components/options/SimpleRadio';
+
+const initialValues: InitialValuesType = {
+  speed: 'normal'
+};
+
+const speeds: {
+  label: string;
+  description: string;
+  value: Speed;
+}[] = [
+  {
+    label: 'Slow',
+    value: 'slow',
+    description: 'More probable to unlock the PDF, but may take longer.'
+  },
+  {
+    label: 'Normal',
+    value: 'normal',
+    description: 'Balanced between speed and success rate.'
+  },
+  {
+    label: 'Fast',
+    value: 'fast',
+    description:
+      'Faster unlocking, but less thorough; may fail on complex passwords.'
+  }
+];
+
+export default function UnlockPdf({
+  title,
+  longDescription
+}: ToolComponentProps) {
+  const [input, setInput] = useState<File | null>(null);
+  const [result, setResult] = useState<File | null>(null);
+  const [isProcessing, setIsProcessing] = useState<boolean>(false);
+  const { showSnackBar } = useContext(CustomSnackBarContext);
+
+  const compute = async (values: InitialValuesType, input: File | null) => {
+    if (!input) return;
+
+    try {
+      setIsProcessing(true);
+      const protectedPdf = await unlockPdf(input, values);
+      setResult(protectedPdf);
+    } catch (error) {
+      console.error('Error protecting PDF:', error);
+      showSnackBar(
+        `Failed to protect PDF: ${
+          error instanceof Error ? error.message : String(error)
+        }`,
+        'error'
+      );
+      setResult(null);
+    } finally {
+      setIsProcessing(false);
+    }
+  };
+
+  return (
+    <ToolContent
+      title={title}
+      input={input}
+      setInput={setInput}
+      initialValues={initialValues}
+      compute={compute}
+      inputComponent={
+        <ToolPdfInput
+          value={input}
+          onChange={setInput}
+          accept={['application/pdf']}
+          title={'Input PDF'}
+        />
+      }
+      resultComponent={
+        <ToolFileResult
+          title={'Unlocked PDF'}
+          value={result}
+          extension={'pdf'}
+          loading={isProcessing}
+          loadingText={'Unlocking PDF'}
+        />
+      }
+      getGroups={({ values, updateField }) => [
+        {
+          title: 'Speed',
+          component: speeds.map(({ label, description, value }) => (
+            <SimpleRadio
+              key={value}
+              checked={value === values.speed}
+              title={label}
+              description={description}
+              onClick={() => updateField('speed', value)}
+            />
+          ))
+        }
+      ]}
+    />
+  );
+}
diff --git a/src/pages/tools/pdf/unlock-pdf/meta.ts b/src/pages/tools/pdf/unlock-pdf/meta.ts
new file mode 100644
index 0000000..5168a64
--- /dev/null
+++ b/src/pages/tools/pdf/unlock-pdf/meta.ts
@@ -0,0 +1,24 @@
+import { defineTool } from '@tools/defineTool';
+import { lazy } from 'react';
+
+export const meta = defineTool('pdf', {
+  name: 'Unlock PDF',
+  path: 'unlock-pdf',
+  icon: 'material-symbols:lock_open',
+  description:
+    'Remove password protection from your PDF files securely in your browser',
+  shortDescription: 'Unlock PDF files securely',
+  keywords: [
+    'pdf',
+    'unlock',
+    'remove password',
+    'decrypt',
+    'unprotect',
+    'security',
+    'browser',
+    'decryption'
+  ],
+  longDescription:
+    'Remove password protection from your PDF files securely in your browser. Your files never leave your device, ensuring complete privacy while unlocking your documents for easier access and sharing.',
+  component: lazy(() => import('./index'))
+});
diff --git a/src/pages/tools/pdf/unlock-pdf/service.ts b/src/pages/tools/pdf/unlock-pdf/service.ts
new file mode 100644
index 0000000..3068cee
--- /dev/null
+++ b/src/pages/tools/pdf/unlock-pdf/service.ts
@@ -0,0 +1,23 @@
+import { InitialValuesType } from './types';
+import { loadPDFData } from '../utils';
+import { unlockWithGhostScript } from '../../../../lib/ghostscript/worker-init';
+
+export async function unlockPdf(
+  pdfFile: File,
+  options: InitialValuesType
+): Promise<File> {
+  // Check if file is a PDF
+  if (pdfFile.type !== 'application/pdf') {
+    throw new Error('The provided file is not a PDF');
+  }
+
+  const dataObject = {
+    psDataURL: URL.createObjectURL(pdfFile),
+    speed: options.speed
+  };
+  const protectedFileUrl: string = await unlockWithGhostScript(dataObject);
+  return await loadPDFData(
+    protectedFileUrl,
+    pdfFile.name.replace('.pdf', '-unlocked.pdf')
+  );
+}
diff --git a/src/pages/tools/pdf/unlock-pdf/types.ts b/src/pages/tools/pdf/unlock-pdf/types.ts
new file mode 100644
index 0000000..8e1ddc1
--- /dev/null
+++ b/src/pages/tools/pdf/unlock-pdf/types.ts
@@ -0,0 +1,5 @@
+export type Speed = 'fast' | 'normal' | 'slow';
+
+export type InitialValuesType = {
+  speed: Speed;
+};