diff --git a/CHANGELOG.md b/CHANGELOG.md
index 117412f..3cad6e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,39 @@
 # Changelog
 
+## [0.1.8](https://github.com/pi-docket/ConvertX-CN/releases/tag/v0.1.8) (2026-01-20)
+
+### 🐛 Bug Fixes
+
+- **LibreOffice PDF→DOCX**: 修復 PDF 轉 DOCX 一定失敗的問題
+  - 新增 PDF Import Pipeline：使用 `--infilter=writer_pdf_import`
+  - 分流邏輯：PDF→文字格式 vs 一般轉換
+  - 支援 PDF→DOCX/ODT/RTF/TXT/HTML
+
+### 🛡️ Reliability
+
+- **輸出檔案驗證**: 新增 `existsSync` 檢查，確保轉換真的成功
+- **錯誤訊息優化**: 根據 stderr 內容提供有意義的中文錯誤訊息
+  - 識別加密檔案、損壞檔案、缺少 filter 等情況
+  - 避免 ENOENT 錯誤擴散
+
+### 📝 Technical Notes
+
+- LibreOffice 架構說明：
+  - Export Pipeline：原生格式→導出格式（DOCX→PDF）
+  - Import Pipeline：非原生格式→原生格式（PDF→DOCX）
+  - PDF 作為輸入時必須使用 `writer_pdf_import`
+
+### ⚠️ Known Limitations
+
+以下情況仍會失敗（LibreOffice 限制）：
+
+- 加密/密碼保護的 PDF/DOCX
+- 損壞的檔案
+- 缺少必要字型（可能成功但版面錯亂）
+- 並行大量轉檔（LibreOffice 對 concurrent instance 不友善）
+
+---
+
 ## [0.1.7](https://github.com/pi-docket/ConvertX-CN/releases/tag/v0.1.7) (2026-01-20)
 
 ### 🐛 Bug Fixes
diff --git a/Dockerfile b/Dockerfile
index 16b48e9..961251b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # ==============================================================================
 # ConvertX-CN 官方 Docker Image
-# 版本：v0.1.7
+# 版本：v0.1.8
 # ==============================================================================
 #
 # 📦 Image 說明：
diff --git a/package.json b/package.json
index e7abb7d..e78705f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "convertx-frontend",
-  "version": "0.1.7",
+  "version": "0.1.8",
   "scripts": {
     "dev": "bun run --watch src/index.tsx",
     "hot": "bun run --hot src/index.tsx",
diff --git a/src/converters/libreoffice.ts b/src/converters/libreoffice.ts
index 02f389a..148171d 100644
--- a/src/converters/libreoffice.ts
+++ b/src/converters/libreoffice.ts
@@ -1,6 +1,35 @@
 import { execFile as execFileOriginal } from "node:child_process";
+import { existsSync as existsSyncOriginal } from "node:fs";
+import { basename, dirname, join } from "node:path";
 import { ExecFileFn } from "./types";
 
+// ==============================================================================
+// LibreOffice 轉換器
+// ==============================================================================
+//
+// 🔑 關鍵技術說明：
+//
+// LibreOffice 有兩種轉換模式：
+//
+// 1. Export Pipeline（輸出轉換）
+//    - 用於：DOCX → PDF, ODT → PDF 等
+//    - 原生格式 → 導出格式
+//    - 使用 --convert-to 參數
+//
+// 2. Import Pipeline（輸入轉換）
+//    - 用於：PDF → DOCX, PDF → ODT 等
+//    - 非原生格式 → 原生格式
+//    - 必須使用 --infilter 參數指定 import filter
+//
+// ⚠️ 常見錯誤：
+//    PDF → DOCX 若不指定 --infilter=writer_pdf_import
+//    會得到 "no export filter" 錯誤
+//
+// ==============================================================================
+
+// 用於測試的依賴注入類型
+export type ExistsSyncFn = (path: string) => boolean;
+
 export const properties = {
   from: {
     text: [
@@ -102,7 +131,7 @@ const filters: Record<FileCategories, Record<string, string>> = {
     odt: "writer8",
     ott: "writer8_template",
     pages: "Apple Pages",
-    // pdf: "writer_pdf_import",
+    pdf: "writer_pdf_Export", // PDF 作為輸出格式
     psw: "PocketWord File",
     rtf: "Rich Text Format",
     sdw: "StarOffice_Writer",
@@ -123,6 +152,16 @@ const filters: Record<FileCategories, Record<string, string>> = {
   calc: {},
 };
 
+// ==============================================================================
+// PDF Import Filter（PDF 作為輸入格式時使用）
+// ==============================================================================
+const PDF_IMPORT_FILTER = "writer_pdf_import";
+
+// 需要使用 PDF import pipeline 的情況
+function needsPdfImportPipeline(inputExt: string, outputExt: string): boolean {
+  return inputExt === "pdf" && ["docx", "doc", "odt", "rtf", "txt", "html"].includes(outputExt);
+}
+
 const getFilters = (fileType: string, converto: string) => {
   if (fileType in filters.text && converto in filters.text) {
     return [filters.text[fileType], filters.text[converto]];
@@ -139,39 +178,115 @@ export function convert(
   targetPath: string,
   options?: unknown,
   execFile: ExecFileFn = execFileOriginal,
+  existsSync: ExistsSyncFn = existsSyncOriginal,
 ): Promise<string> {
-  const outputPath = targetPath.split("/").slice(0, -1).join("/").replace("./", "") ?? targetPath;
+  const outputDir = dirname(targetPath).replace("./", "") || ".";
+  const inputFileName = basename(filePath);
+  const inputBaseName = inputFileName.replace(/\.[^.]+$/, "");
+  const expectedOutputFile = join(outputDir, `${inputBaseName}.${convertTo}`);
 
   // Build arguments array
   const args: string[] = [];
   args.push("--headless");
-  const [inFilter, outFilter] = getFilters(fileType, convertTo);
 
-  if (inFilter) {
-    args.push(`--infilter="${inFilter}"`);
-  }
+  // ==============================================================================
+  // 關鍵分流：PDF → 文字格式 vs 其他轉換
+  // ==============================================================================
+  if (needsPdfImportPipeline(fileType, convertTo)) {
+    // PDF → DOCX/ODT 等：必須使用 import pipeline
+    console.log(`[LibreOffice] Using PDF import pipeline: ${fileType} → ${convertTo}`);
+    args.push(`--infilter=${PDF_IMPORT_FILTER}`);
 
-  if (outFilter) {
-    args.push("--convert-to", `${convertTo}:${outFilter}`, "--outdir", outputPath, filePath);
+    // 輸出格式仍需指定 filter
+    const outFilter = filters.text[convertTo];
+    if (outFilter && convertTo !== "pdf") {
+      args.push("--convert-to", `${convertTo}:${outFilter}`);
+    } else {
+      args.push("--convert-to", convertTo);
+    }
   } else {
-    args.push("--convert-to", convertTo, "--outdir", outputPath, filePath);
+    // 一般轉換流程（export pipeline）
+    const [inFilter, outFilter] = getFilters(fileType, convertTo);
+
+    if (inFilter && fileType !== "pdf") {
+      args.push(`--infilter=${inFilter}`);
+    }
+
+    if (outFilter) {
+      args.push("--convert-to", `${convertTo}:${outFilter}`);
+    } else {
+      args.push("--convert-to", convertTo);
+    }
   }
 
+  args.push("--outdir", outputDir, filePath);
+
+  console.log(`[LibreOffice] Command: soffice ${args.join(" ")}`);
+
   return new Promise((resolve, reject) => {
     execFile("soffice", args, (error, stdout, stderr) => {
-      if (error) {
-        reject(`error: ${error}`);
-      }
+      // ==============================================================================
+      // 錯誤處理與輸出檔案驗證
+      // ==============================================================================
 
       if (stdout) {
-        console.log(`stdout: ${stdout}`);
+        console.log(`[LibreOffice] stdout: ${stdout}`);
       }
 
       if (stderr) {
-        console.error(`stderr: ${stderr}`);
+        console.error(`[LibreOffice] stderr: ${stderr}`);
       }
 
+      // 檢查 LibreOffice 執行錯誤
+      if (error) {
+        const errorMsg = getLibreOfficeErrorMessage(error, stderr);
+        console.error(`[LibreOffice] Error: ${errorMsg}`);
+        reject(errorMsg);
+        return;
+      }
+
+      // ==============================================================================
+      // 關鍵防呆：檢查輸出檔案是否實際存在
+      // ==============================================================================
+      if (!existsSync(expectedOutputFile)) {
+        const errorMsg = `LibreOffice 轉換失敗：輸出檔案不存在 (${expectedOutputFile})。可能原因：1) 輸入檔案損壞或加密 2) 缺少必要字型 3) 格式不支援`;
+        console.error(`[LibreOffice] ${errorMsg}`);
+        reject(errorMsg);
+        return;
+      }
+
+      console.log(`[LibreOffice] Successfully created: ${expectedOutputFile}`);
       resolve("Done");
     });
   });
 }
+
+// ==============================================================================
+// 錯誤訊息解析
+// ==============================================================================
+function getLibreOfficeErrorMessage(
+  error: Error & { code?: number | string },
+  stderr: string,
+): string {
+  const stderrLower = stderr.toLowerCase();
+
+  // 常見錯誤類型判斷
+  if (stderrLower.includes("no export filter")) {
+    return "LibreOffice 錯誤：找不到 export filter。可能是格式不支援或需要使用不同的轉換路徑。";
+  }
+
+  if (stderrLower.includes("password") || stderrLower.includes("encrypted")) {
+    return "LibreOffice 錯誤：檔案已加密或需要密碼。請先解除密碼保護。";
+  }
+
+  if (stderrLower.includes("corrupt") || stderrLower.includes("damaged")) {
+    return "LibreOffice 錯誤：檔案已損壞或格式無效。";
+  }
+
+  if (error.code === "ENOENT") {
+    return "LibreOffice 錯誤：找不到 soffice 執行檔。請確認 LibreOffice 已正確安裝。";
+  }
+
+  // 通用錯誤
+  return `LibreOffice 轉換失敗 (exit code: ${error.code || "unknown"}): ${stderr || error.message}`;
+}
diff --git a/tests/converters/libreoffice.test.ts b/tests/converters/libreoffice.test.ts
index 4d07f1e..96e04d0 100644
--- a/tests/converters/libreoffice.test.ts
+++ b/tests/converters/libreoffice.test.ts
@@ -1,5 +1,5 @@
-import { afterEach, beforeEach, expect, test } from "bun:test";
-import { convert } from "../../src/converters/libreoffice";
+import { afterEach, beforeEach, describe, expect, test } from "bun:test";
+import { convert, type ExistsSyncFn } from "../../src/converters/libreoffice";
 import type { ExecFileFn } from "../../src/converters/types";
 
 function requireDefined<T>(value: T, msg: string): NonNullable<T> {
@@ -13,16 +13,22 @@ let calls: Call[] = [];
 
 let behavior:
   | { kind: "success"; stdout?: string; stderr?: string }
-  | { kind: "error"; message?: string; stderr?: string } = { kind: "success" };
+  | { kind: "error"; message?: string; stderr?: string; code?: string } = { kind: "success" };
+
+// Mock fs.existsSync to control output file existence check
+let mockFileExists = true;
+
+const mockExistsSync: ExistsSyncFn = () => mockFileExists;
 
 const mockExecFile: ExecFileFn = (cmd, args, cb) => {
   calls.push({ cmd, args });
   if (behavior.kind === "error") {
-    cb(new Error(behavior.message ?? "mock failure"), "", behavior.stderr ?? "");
+    const error = new Error(behavior.message ?? "mock failure") as Error & { code?: string };
+    if (behavior.code) error.code = behavior.code;
+    cb(error, "", behavior.stderr ?? "");
   } else {
     cb(null, behavior.stdout ?? "ok", behavior.stderr ?? "");
   }
-  // We don't return a real ChildProcess in tests.
   return undefined;
 };
 
@@ -33,7 +39,6 @@ let errors: string[] = [];
 const originalLog = console.log;
 const originalError = console.error;
 
-// Use Console["log"] for typing; avoids explicit `any`
 const makeSink =
   (sink: string[]): Console["log"] =>
   (...data) => {
@@ -43,6 +48,7 @@ const makeSink =
 beforeEach(() => {
   calls = [];
   behavior = { kind: "success" };
+  mockFileExists = true;
 
   logs = [];
   errors = [];
@@ -55,107 +61,214 @@ afterEach(() => {
   console.error = originalError;
 });
 
-// --- core behavior -----------------------------------------------------------
-test("invokes soffice with --headless and outdir derived from targetPath", async () => {
-  await convert("in.docx", "docx", "odt", "out/out.odt", undefined, mockExecFile);
+// ==============================================================================
+// PDF → DOCX (Import Pipeline) 測試
+// ==============================================================================
+describe("PDF Import Pipeline", () => {
+  test("PDF → DOCX uses writer_pdf_import filter", async () => {
+    await convert("in.pdf", "pdf", "docx", "out/out.docx", undefined, mockExecFile, mockExistsSync);
 
-  const { cmd, args } = requireDefined(calls[0], "Expected at least one execFile call");
-  expect(cmd).toBe("soffice");
-  expect(args).toEqual([
-    "--headless",
-    `--infilter="MS Word 2007 XML"`,
-    "--convert-to",
-    "odt:writer8",
-    "--outdir",
-    "out",
-    "in.docx",
-  ]);
+    const { cmd, args } = requireDefined(calls[0], "Expected at least one execFile call");
+    expect(cmd).toBe("soffice");
+    expect(args).toContain("--infilter=writer_pdf_import");
+    expect(args).toContain("--convert-to");
+
+    // 驗證輸出格式包含正確的 filter
+    const convertToIdx = args.indexOf("--convert-to");
+    expect(args[convertToIdx + 1]).toBe("docx:MS Word 2007 XML");
+  });
+
+  test("PDF → ODT uses writer_pdf_import filter", async () => {
+    await convert("in.pdf", "pdf", "odt", "out/out.odt", undefined, mockExecFile, mockExistsSync);
+
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    expect(args).toContain("--infilter=writer_pdf_import");
+
+    const convertToIdx = args.indexOf("--convert-to");
+    expect(args[convertToIdx + 1]).toBe("odt:writer8");
+  });
+
+  test("PDF → RTF uses writer_pdf_import filter", async () => {
+    await convert("in.pdf", "pdf", "rtf", "out/out.rtf", undefined, mockExecFile, mockExistsSync);
+
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    expect(args).toContain("--infilter=writer_pdf_import");
+  });
+
+  test("PDF → TXT uses writer_pdf_import filter", async () => {
+    await convert("in.pdf", "pdf", "txt", "out/out.txt", undefined, mockExecFile, mockExistsSync);
+
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    expect(args).toContain("--infilter=writer_pdf_import");
+  });
 });
 
-test("uses only outFilter when input has no filter (e.g., pdf -> txt)", async () => {
-  await convert("in.pdf", "pdf", "txt", "out/out.txt", undefined, mockExecFile);
+// ==============================================================================
+// 一般轉換流程（Export Pipeline）測試
+// ==============================================================================
+describe("Export Pipeline", () => {
+  test("DOCX → PDF uses normal export pipeline (no infilter)", async () => {
+    await convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync);
 
-  const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
 
-  expect(args).not.toContainEqual(expect.stringMatching(/^--infilter=/));
-  expect(args).toEqual(["--headless", "--convert-to", "txt", "--outdir", "out", "in.pdf"]);
+    // DOCX → PDF 不應該使用 PDF import filter
+    expect(args).not.toContain("--infilter=writer_pdf_import");
+    expect(args).toContain("--convert-to");
+
+    const convertToIdx = args.indexOf("--convert-to");
+    expect(args[convertToIdx + 1]).toBe("pdf:writer_pdf_Export");
+  });
+
+  test("DOCX → ODT uses correct filters", async () => {
+    await convert("in.docx", "docx", "odt", "out/out.odt", undefined, mockExecFile, mockExistsSync);
+
+    const { cmd, args } = requireDefined(calls[0], "Expected at least one execFile call");
+    expect(cmd).toBe("soffice");
+
+    // 應該有 infilter 和 outfilter
+    expect(args).toContain("--infilter=MS Word 2007 XML");
+
+    const convertToIdx = args.indexOf("--convert-to");
+    expect(args[convertToIdx + 1]).toBe("odt:writer8");
+  });
+
+  test("ODT → PDF uses export pipeline", async () => {
+    await convert("in.odt", "odt", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync);
+
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    expect(args).not.toContain("--infilter=writer_pdf_import");
+  });
 });
 
-test("uses only infilter when convertTo has no out filter (e.g., docx -> pdf)", async () => {
-  await convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile);
+// ==============================================================================
+// 輸出檔案驗證測試
+// ==============================================================================
+describe("Output File Verification", () => {
+  test("resolves with 'Done' when output file exists", async () => {
+    mockFileExists = true;
+    behavior = { kind: "success", stdout: "Conversion completed", stderr: "" };
 
-  const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    await expect(
+      convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync),
+    ).resolves.toBe("Done");
+  });
 
-  // If docx has an infilter, it should be present
-  expect(args).toEqual(["--headless", "--convert-to", "pdf", "--outdir", "out", "in.docx"]);
+  test("rejects when output file does not exist", async () => {
+    mockFileExists = false;
+    behavior = { kind: "success", stdout: "", stderr: "" };
 
-  const i = args.indexOf("--convert-to");
-  expect(i).toBeGreaterThanOrEqual(0);
-  expect(args[i + 1]).toBe("pdf");
-  expect(args.slice(-2)).toEqual(["out", "in.docx"]);
+    await expect(
+      convert("in.pdf", "pdf", "docx", "out/out.docx", undefined, mockExecFile, mockExistsSync),
+    ).rejects.toMatch(/輸出檔案不存在/);
+  });
+
+  test("rejects when execFile returns an error", async () => {
+    behavior = { kind: "error", message: "convert failed", stderr: "oops" };
+
+    await expect(
+      convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile, mockExistsSync),
+    ).rejects.toMatch(/LibreOffice 轉換失敗/);
+  });
 });
 
-test("strips leading './' from outdir", async () => {
-  await convert("in.txt", "txt", "docx", "./out/out.docx", undefined, mockExecFile);
+// ==============================================================================
+// 錯誤訊息測試
+// ==============================================================================
+describe("Error Messages", () => {
+  test("provides helpful message for 'no export filter' error", async () => {
+    behavior = { kind: "error", message: "failed", stderr: "Error: no export filter for this" };
 
-  const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+    await expect(
+      convert("in.pdf", "pdf", "docx", "out/out.docx", undefined, mockExecFile, mockExistsSync),
+    ).rejects.toMatch(/找不到 export filter/);
+  });
 
-  const outDirIdx = args.indexOf("--outdir");
-  expect(outDirIdx).toBeGreaterThanOrEqual(0);
-  expect(args[outDirIdx + 1]).toBe("out");
+  test("provides helpful message for password-protected files", async () => {
+    behavior = { kind: "error", message: "failed", stderr: "password required" };
+
+    await expect(
+      convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync),
+    ).rejects.toMatch(/加密|密碼/);
+  });
+
+  test("provides helpful message for corrupt files", async () => {
+    behavior = { kind: "error", message: "failed", stderr: "file is corrupt" };
+
+    await expect(
+      convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync),
+    ).rejects.toMatch(/損壞|無效/);
+  });
+
+  test("provides helpful message when soffice not found", async () => {
+    behavior = { kind: "error", message: "ENOENT", stderr: "", code: "ENOENT" };
+
+    await expect(
+      convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync),
+    ).rejects.toMatch(/找不到 soffice/);
+  });
 });
 
-// --- promise settlement ------------------------------------------------------
-test("resolves with 'Done' when execFile succeeds", async () => {
-  behavior = { kind: "success", stdout: "fine", stderr: "" };
-  await expect(
-    convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile),
-  ).resolves.toBe("Done");
+// ==============================================================================
+// 路徑處理測試
+// ==============================================================================
+describe("Path Handling", () => {
+  test("strips leading './' from outdir", async () => {
+    await convert(
+      "in.txt",
+      "txt",
+      "docx",
+      "./out/out.docx",
+      undefined,
+      mockExecFile,
+      mockExistsSync,
+    );
+
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+
+    const outDirIdx = args.indexOf("--outdir");
+    expect(outDirIdx).toBeGreaterThanOrEqual(0);
+    expect(args[outDirIdx + 1]).toBe("out");
+  });
+
+  test("handles nested output directories", async () => {
+    await convert(
+      "in.txt",
+      "txt",
+      "docx",
+      "a/b/c/out.docx",
+      undefined,
+      mockExecFile,
+      mockExistsSync,
+    );
+
+    const { args } = requireDefined(calls[0], "Expected at least one execFile call");
+
+    const outDirIdx = args.indexOf("--outdir");
+    expect(args[outDirIdx + 1]).toBe("a/b/c");
+  });
 });
 
-test("rejects when execFile returns an error", async () => {
-  behavior = { kind: "error", message: "convert failed", stderr: "oops" };
-  await expect(
-    convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile),
-  ).rejects.toMatch(/error: Error: convert failed/);
-});
-
-// --- logging behavior --------------------------------------------------------
-test("logs stdout when present", async () => {
-  behavior = { kind: "success", stdout: "hello", stderr: "" };
-
-  await convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile);
-
-  expect(logs).toContain("stdout: hello");
-  expect(errors).toHaveLength(0);
-});
-
-test("logs stderr when present", async () => {
-  behavior = { kind: "success", stdout: "", stderr: "uh-oh" };
-
-  await convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile);
-
-  expect(errors).toContain("stderr: uh-oh");
-  // When stdout is empty, no stdout log
-  expect(logs.find((l) => l.startsWith("stdout:"))).toBeUndefined();
-});
-
-test("logs both stdout and stderr when both are present", async () => {
-  behavior = { kind: "success", stdout: "alpha", stderr: "beta" };
-
-  await convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile);
-
-  expect(logs).toContain("stdout: alpha");
-  expect(errors).toContain("stderr: beta");
-});
-
-test("logs stderr on exec error as well", async () => {
-  behavior = { kind: "error", message: "boom", stderr: "EPIPE" };
-
-  expect(convert("in.txt", "txt", "docx", "out/out.docx", undefined, mockExecFile)).rejects.toMatch(
-    /error: Error: boom/,
-  );
-
-  // The callback still provided stderr; your implementation logs it before settling
-  expect(errors).toContain("stderr: EPIPE");
+// ==============================================================================
+// 日誌測試
+// ==============================================================================
+describe("Logging", () => {
+  test("logs command being executed", async () => {
+    await convert("in.pdf", "pdf", "docx", "out/out.docx", undefined, mockExecFile, mockExistsSync);
+
+    expect(logs.some((l) => l.includes("[LibreOffice] Command:"))).toBe(true);
+  });
+
+  test("logs when using PDF import pipeline", async () => {
+    await convert("in.pdf", "pdf", "docx", "out/out.docx", undefined, mockExecFile, mockExistsSync);
+
+    expect(logs.some((l) => l.includes("PDF import pipeline"))).toBe(true);
+  });
+
+  test("logs successful conversion", async () => {
+    mockFileExists = true;
+    await convert("in.docx", "docx", "pdf", "out/out.pdf", undefined, mockExecFile, mockExistsSync);
+
+    expect(logs.some((l) => l.includes("Successfully created"))).toBe(true);
+  });
 });