PDF 轉換圖片

 保護您的隱私和資料安全（線上轉換器需要上傳）。
 批量轉換 PDF。
 快速選擇來源：只需拖放檔案即可。
 無需下載，將結果直接存儲在本地 PC 中。
 便捷的轉換器：隨時運行，即使沒有網路也能工作。
 支援命令列介面（CLI）：如果您擅長程式設計，則可以提高生產率。
 支援系統級上下文功能表。
 合理且負擔得起的許可費，並享受免費的終身支援。
 直觀、實用、緊湊的介面，正宗且熟悉的 PDF 紅。
 100% 純淨：無廣告、無搭售軟體、無病毒、無間諜軟體，只為更好。

PDF 轉換圖片用來以批量方式轉換 PDF 檔為 JPG、PNG、BMP、TIF、GIF、PCX 及 TGA 圖片。不必安裝 Adobe Acrobat 或 Adobe Reader 即可工作，且擁有命令列介面（CLI）、快速而精確的轉換能力、友好的圖形化使用者介面（GUI）、小巧等特點。

它會在輸出的 JPG/PNG/BMP/TIF/GIF/PCX/TGA 圖片中保留 PDF 檔的原始外觀。

此外，PDF to JPG 支援 Unicode PDF 檔案名及內容、轉換帶密碼保護的 PDF 檔、設定圖片解析度及顏色、旋轉/合併圖片、添加頁眉/頁腳以保護您的版權、將每個輸出存儲到單獨的子資料夾中、指定轉換頁碼。

Wow- amazing customer service! Thanks so much for your prompt attention and for a great product! - By Steven Bloom (US)
Installed the program, wow, this is nice program, very handy for website makers. Thanks a lot! - By Bart Vreeswijk
Very useful for me, I often have to convert pdf drawings into jpg so I can manipulate them in photoshop equivalent or import into CAD program. Previously done via serif pageplus or paperport but this is simpler. Easy install into Windows 7 64 laptop and worked fine when tested. Will keep and use, thank you. - By bungalowbuild
Installed and registered the program on Win 10 Pro 64bit desktop. Registration and etc. was a breeze. The program works as stated and I will keep it until I have another that is better. Thank you TriSun! - By Rick Martin
Why convert a pdf to jpg? Microsoft Publisher doesn’t import pdf’s. Just one thought. Someone sends me a pdf, I can convert it to jpg and import it. Copy/paste isn’t so good of an option. - By RW
I am very pleased with the software. There is not a lot of software that I like and find a waste of time, but am impressed with your sofyware. - By James A Weir (GB)

Kelli's C.R.U.S.A.D.E. (US)	株式会社ツナシマ (JP)	Kariwala Industries Ltd (IN)	DN INŽENJERING (HR)	Windy City Darters (US)
Airmatic Filterbau GmbH (DE)	BICON Laboratories BV (NL)	Suncoast Precision Tools Inc. (US)	Expo Dental (MX)	Hairy Worm Ltd (GB)
Eerlijke WOZ B.V. (NL)	LuxArtis (IT)	JK Baubetreuung GmbH Jürgen Keller (DE)	L3 SOFTWARE LTDA (BR)	The Scan Clinic (GB)
amalfi charter sas (IT)	Pit Stop Service Centre (GB)	Startup Design (AT)	Norris Technologies (US)	Blue Star Rental & Sales (US)
Vintage Craft Loft (US)	NEXSA S.A. (CL)	Orthodontix Ltd (NZ)	KING MINDAUGAS APARTMENTS & STUDIOS (LT)	CERAMICHE & DINTORNI (IT)
Epilady 2000 LLC (IL)	AMBROSIUS Objekteinrichtung (DE)	Aurous Consultancy (US)	Fleisch am Chnoche AG (CH)	Expressive Textiles (AU)
Uniq-2U Shop (US)	Jackson Holmes (NZ)	Trummer GmbH & Co KG (AT)	Metzgerei Schrotter (DE)	Ailesbury Clinic (IE)
Governance Associates Ltd (AU)	VesiMedia (NL)	BeterBaan Uitzendbureau B.V. (NL)	Franszzp13 (NL)	BGA DIRECT, S.L. (ES)
MATTE Professionals Ltd (HK)	Love in Action (International) (GB)	Renard Resources Ltd (GB)	IT Konzalting Marcus d.o.o. (HR)	LABORATORIOS AFFAR S.A. (ES)
WiTel Srl (IT)	Catalpa Systems, Inc. (US)	Gagliardo Realty Associates (US)	Paris Marais Dance School (FR)	Ex Demo Hut (IE)
Superior Evaporants Inc. (US)	Inform'Aid (NL)	E-Glow Solutions Inc. (US)	Bryson Van Raay - Vesnaver (CA)	ER Extensions (CA)
Valley Pools, Inc. (US)	Tischlerei Voß (DE)	ADLER PARKETT (DE)	Motophil (PH)	Richard D. Marks Professional Corporation (US)
Impact Foods (GB)	GSC Logistics (US)	DubrovnikCharter (RO)	Admedico (NL)	Commodore Volunteer Fire Department (US)
Jones Plastic & Engineering (US)	Ituran (IL)	Trinova Health (US)	Hostingplaza (IT)	Bishop Law Firm (US)
Jäckle Data Management (CH)	Comstar Systems Pty Ltd (AU)	XWear (US)	Pedagógusok Szakszervezete (HU)	Mark Adams Real Estate Pty Ltd (AU)
pin-co.de (DE)	Epilady 2000 LLC (IL)	Take Me (Far East) Limited (HK)	Huning LLLP (US)	Saini Electro Control (IN)
FIITJEE Limited (IN)	Das Dutchman Essenhaus (US)	ACTIVIDADES DE CONSTRUCCION Y SERVICIOS (ES)	BauZert (DE)	Unified Healthcare Group Pty Ltd (AU)
Certified AC Services (US)	Northern Waterworks Inc. (CA)	TIGERNUTS TRADERS, S.L (ES)	Wheel Smart Repairs (GB)	Bohomonde LLC (US)
Hawash Meade Gaston Neese & Cicack LLP (US)	blueHOMES AG (DE)	Kounis Metal Industries (AU)	Realm Entertainment (MT)	E&E Vapor Emporium (MX)
K'Atl'Odeeche First Nation (CA)	Exceptional Aging (US)	JMS Medical (HK)	Morro Bay Chamber of Commerce (US)	ElectroPlan (NZ)
Events Pro Shop (AU)	Toinspire Productions (GB)	Sabine Schraml (DE)	cyberlab digitale entwicklungen gmbh (AT)	Franklin Telecom Supply Inc. (US)
Westport Rivers Winery (US)	CJ.NET (KR)	ClearStaff Inc. (US)	CSD (DE)	A+ Career Apparel (US)
Phocatox Technologies (US)	Gray's Engineering & Consulting, Inc. (US)	Lasting Images Photography (CA)	Home Care Rx (CA)	TRANSGLYPHE (FR)
Day Marketing Solutions, LLC (US)	Municipalité de Matapédia (CA)	Brands Spargel (DE)	Vqlink (IL)	Vintage Craft Loft (US)
Silver Shine (IL)	J Good and T Smith Partners (GB)	Takamaka Media Ltd (FR)	Robin Armstrong Enterprises Inc. (CA)	Morningdale Log Homes, LLC. (US)
Vendo (BE)	Chance Developments (BG)	Tham Wai Kit (MY)	Patriot Games (GB)	Play By Ear Sdn. Bhd. (MY)
Layalina Band Inc (US)	Rally4Recovery (US)	La Maison de l'Homme (FR)	Cynthia Peak Hofffmann, Realtor (US)	Leo Hartas Ltd (GB)
The PC Answer (US)	Athom (FR)	AlfaCoach, S.p.A. (CL)	Experienced Books LLC (US)	Claus Nehring (LU)
Megakrage (US)	Stone Multimedia Solution Corp. (CA)	Gilded Cage Engraving (US)	M.P.Handyman (US)	Marzac Enterprises Inc (US)
DONOVAN LEASING (US)	Web Services Group LLC (US)	Hans-Peter Viechtbauer (DE)	Reginald K Boldon LLC dba RKB Accounting & Tax Service (US)	drenov.dk (DK)
Groupe GT (CA)	Pudman Training Group Pty Ltd (AU)	Umbiko Media Juanita (ZA)	SRoque, SA Sergio Mendes (PT)	Robert Boyd Statefarm Insurance (US)
WebClick KT KFT (HU)	C.M.E.Di Cancellara Maurizio (IT)	Chem Penn, LLC (US)	AUDIOVISUAL ESPAÑOLA 2000, S.A. (ES)	Tonya Trolz - Ind. Norwex Consultant (US)
Stone Soup School (US)	Sarment's Electronics (US)	PC Triage (US)	Memorial Rock Safes Australia (AU)	Capitol II Theatre (US)
Anchors Up (CA)	Nagy Jenő AXON M Kft LTD (HU)	SMALO Smarthome And Light Organisation (DE)	Property Line Maps (US)	Murray Isles (AU)
EUREKA NATURAL FOODS (US)	Gasthof zur Altmühlquelle . Inhaber Jochen Popp (DE)	Cre8ivDezine (US)	PF Accompagnement (FR)	Jace J Studios (US)
Equeller Pty Ltd (AU)	Rusty Pipe Mechanical Inc. (CA)	RICHMONDTECH LLC (US)	Gilbert Advertising, Inc. (US)	Peter Worth Photography (GB)
Pressure Washers Parts (AU)	I.C.B Design & Engineering Ltd (GB)	Rohbock Enterprises LLC (US)	My PC Support (CA)	Litigation Evaluation Service (US)

版本 發佈 / 更新日期	新功能 / 改進	Bugs 修復
18.1 2020/12/23	重要（I）：能顯示轉換進度，之前的版本僅提示“正在轉換，請稍候...”。 能通過上下文功能表開啟 PDF 位置。	清單內容變更（如添加 PDF、轉換、切換語言等）後，未更新清單排序。
18.0 2020/12/18	重要（I）：支援合併輸出圖片為一張，甚至可以設定每幾張圖片合併一次。 I：全面控制旋轉設定的可用性，特別是輸出格式為 TGA 或 PCX 的情況。 在主介面右上角增加“選項”按鈕，以讓您輕鬆檢視/設定選項。 優化土耳其語文字。	I：改變欄寬時（手動及自動），會提示您為鎖定 PDF 輸入密碼。
17.1 2020/11/14	重要（I）：主介面支援調整大小。 I：添加了一個非常重要的設定 - “將每個輸出存儲到單獨的子資料夾中”。在之前的版本中，它總是將每個 PDF 的輸出存儲到單獨的子資料夾中，您無法控制。現在，只需取消勾選此參數，軟體會將所有 PDF 的輸出存儲到同一資料夾中。 I：將不常用的設定分隔到“選項”介面中，以使主介面保持整潔。 對主介面大小使用精確的黃金比例（再次）。
17.0 2020/11/09	重要（I）：能處理任何語言的 Unicode PDF 路徑/檔案名、輸出路徑，如北印度文、韓文、俄文等。之前的版本只能處理純 ASCII 檔案名/路徑及您本地語言的 Unicode 字元，其中處理本地語言還需要將系統“區域設定”改為您的本地語言。 優化主清單資料存取演算法。 大幅優化了轉換相關程式碼。	I：批量轉換模式下，若使用自訂輸出路徑，則當清單中含有不同資料夾下的同名 PDF 時，轉換後只能保留最後一個同名 PDF 的輸出。如：一次性轉換 F:\test.pdf 及 F:\abc\test.pdf，則輸出資料夾“test”只含有 F:\abc\test.pdf 的圖片。 檢視輸出時，若輸出路徑不存在時提示有誤，應為“資料夾不存在”而非“檔案不存在”。 簡體中文的少許文字錯誤。
16.1 2020/11/03	重要（I）：優化所有語言（23 種）主介面文字。 優化許可證驗證模組。 內部性能調優。
16.0 2020/10/30	重要（I）：將輸出圖片放到不同子資料夾下（資料夾名同不帶副檔名的 PDF 檔），不然如果批量轉換多個 PDF 檔，結果資料夾會顯得混亂不堪。舉例：如果您一次性轉換 a.pdf 及 b.pdf，且輸出路徑為 F:\test，之前的版本將在 F:\test 下生成 a1.jpg、a2.jpg、a3.jpg…… 及 b1.jpg、b2.jpg、b3.jpg……；現在它將在 F:\test\a 下生成 a1.jpg、a2.jpg、a3.jpg……，在 F:\test\b 下生成 b1.jpg、b2.jpg、b3.jpg…… I：完全支持原生瑞典語。 能在系統“程式及功能”清單中顯示產品徽標。 內部性能調優。	I：即使未勾選“完成後播放聲音”，但若當前選定的音訊檔存在，也會播放掃描結束聲音。 I：可能在許可證金鑰驗證完成前就調用 CLI，這會導致已授權拷貝在 CLI 下被判定為試用版。 若用戶電腦使用非西曆（如佛曆、伊斯蘭曆等），則可能出現有效許可證被判定為已過期的情況。 日語版中，“完成後播放聲音”詞條未翻譯。 不能在關於介面顯示出授權人或公司名稱中的 & 符號（若有）。
15.0 2020/05/08	重要（I）：轉換完成後播放聲音並可設定您喜愛的聲音。 I：若自訂輸出資料夾不存在，可自動建立。 I：介面優化：更整潔及統一。 I：優化所有 22 種語言的文字。 I：完全支持原生印尼語。 使右上角三個圖片按鈕的圖示居中對齊。 能顯示簡體中文及繁體中文的升級記錄。 內部性能調優。
14.1 Jan 17, 2019 Download This Version	Important: supports system level context menu. Optimized "Request support..." related features.
14.0 May 10, 2018 Download This Version	Important (I): can reset the output settings. I: can sort the [Size] column accurately. I: fully supports native Hrvatski. I: can remember and display the arrow of the sorted column after changed language. Optimized Slovenščina texts. Optimized product homepage. Optimized the online documentation. Optimized internal efficiency.	The "Position" list on the "Header and footer" interface has not been multilingualized.
13.0 Oct 18, 2017 Download This Version	Important (I): supports adding the header & footer to the output images for protecting your copyright. I: fully supports native Slovenščina. I: the list no longer flashes when removing items. I: now can show the update history directly if the new version is available and you chose to view the updates (in previous versions, just only jump to the 'Update History' segment, but have not expanded it, you need to expand it manually to see the update history). Added "Update history" function to the "Help" menu. Changed "Get/retrieve your license (free)" menu item to "Lost license key?" to eliminate ambiguity. Optimized the tooltip of <Add PDF files...> button for Dutch language. Optimized internal efficiency.	There is an item of Polish has not been translated.
12.0 Aug 11, 2017 Download This Version	Important (I): keeps the original case of the filenames in the converted image files (e.g. TeSt.pdf -> TeSt.jpg, previous versions always be "test.jpg"). I: no longer ask you to view the result(s) if there is no any successful conversion. Optimized the Redistributable CLI. Optimized internal efficiency. Optimized official website.	I: if the extension of a PDF file is uppercase and it only has one page or you selected to only convert one page, then cannot complete the conversion, and will cause the source PDF cannot be opened. I: the page No. inputter and viewing file icons are not displayed properly when adjust the corresponding column size. I: in a few languages, click "Help -> Command line interface" menu item will go to the non-existent CLI documentation segment. A little text error in JA & KO languages.
11.0 Mar 30, 2017 Download This Version	Important (I): if the PDF has only ONE page or you only want to convert ONE page, then do NOT add the page No. to the end of the output filename. If most of your PDFs have only one page, this feature will be very helpful. I: can display the up/down arrows on the sorted column header. I: you can add PDF files by double-click blank area of the listbox, it's a new friendlier design. I: optimized the appearance of <Convert all now!> button, more beautiful. Added the "Video tutorial" menu item to the "Help" button. Optimized the font of progress bar. Uses the exact Golden Ratio for the size of main interface.	I: if you use non-English OS, you MAY see the unreadable no-English texts when install it. In the trial version, when you click <Convert all now!> button, it will show the limitation and ask you buy a license, but if you clicked <Cancel> on the prompt dialog box, it will do converting still.
10.0 Oct 05, 2016	Important: optimized the output filenames and path. For example: in previous versions, it will convert test.pdf into "output folder\test.pdf-JPG\P0001.jpg, P0002.jpg, ... P0235.jpg...", now, stored as "output folder\test1.jpg, test2.jpg, ... test235.jpg...". This feature will greatly reduce the workload of renaming the output image files, and you can see the outputs at a glance even conveniently compare the PDF file with the converted results. Important: check if the file is a valid PDF document when drag-and-drop it to the list. Important: added the icon for the context menuitem of the main list. Optimized the -? argument for CLI: points to the really existing segment of the help document. Optimized software texts for multiple languages. Changed the trial limitation from "6 pages trial" to "watermarks the outputs". Can remove the whole PTJ program folder after uninstalled it. Removed the "Add to Quick Launch Bar" option from the installer, because from Win Vista, it has no meaning. Uses the special purchase page for PTJ, simpler and clearer.
9.0 Jun 21, 2016	Important: can remember the output settings automatically. Important: fully supports native 日本語. Important: fully supports native 한국어. Optimized the English texts of software (interfaces and message boxes) , especially, standardized the initial capital. Added the proper icon to all system message boxes, and all of these message boxes support pressing <Esc> to close. Changed all "facebook" strings to "Facebook". Optimized some texts of Italiano. Optimized the web pages of PDF to JPG.	In Traditional Chinese edition, the <OK> button of the input password window cannot be fully displayed.
8.0 May 21, 2016	Important: the list of main interface supports sorting data. Important: fully supports native Русский. Important: fully supports native Nederlands. Important: uses the Segoe UI font which is used in Vista ~ Win10 and highly recommended by Microsoft for all interfaces, makes PTJ to be more beautiful and friendlier greatly. No longer uses the bold texts on the main interface, replaced them as colorful texts, more readable. Changed the splitter color from black to gray for about interface to make it friendlier. Optimized the color of license type and "license to..." labels for about interface. Optimized the appearance of the main interface - no longer displays the surplus blank. Optimized some texts of Deutsch.
7.0 Apr 04, 2016	Important: fully supports native Español. Important: fully supports native Français. Optimized some texts (software and website) for current 13 languages. Closed the automatic new version checking feature of PTJ Redistributable CLI, in order to avoid the confusing for your end users. Optimized internal efficiency. Changed "Microsoft Internet Explorer" string to "Microsoft Web Browser", because Windows 10 uses Microsoft Edge, for consistency, now calls them as "Microsoft Web Browser". Optimized the translation interface for all languages. The width and height of the main interface is not exact Golden Ratio. Optimized the website.	Fixed a latent bug - pressing <Enter> on the system dialog boxes may open the selected PDF file.
6.0 Mar 25, 2016	Important: fully supports native Українська. Optimized Magyar texts (software and website). Added the "Information" icon to the "About..." interfaces of CLI and Redistributable CLI. Optimized the "request remote support" feature - links to company site directly, in order to avoid clicking the mouse twice and jumping the page again. Optimized the "retrieve your license" feature - use the self-service to retrieve it instantly, no longer need to wait for us to verify it and send back to you manually. Added <F1> shortcut key to "Online help" menu item. Optimized the progress prompt during converting - change the mouse cursor to busy status.	In the extreme case, the language choosing menu may cause a serious internal error.
5.0 Mar 08, 2016	Important: now, supports to rotate the output images: CW or CCW, 90°/180°/270° or any other angles (degree). Important: fully supports native Afrikaans. Optimized some texts of software and website. Supports to open the PDF file by pressing <Enter> key. The [Size] and [Total pages] columns support comma style. Changed the format of all screenshots on the website from GIF to PNG, in order to let you see the original and most clear appearance of the product. Optimized the installer, simplified the installed steps. Optimized some texts for current 12 languages. Use the new company logo on the "About..." interface. Optimized the text format of license agreement for installer, let it to be easier to read.
4.2 Nov 26, 2015	Important: fully supports native Italiano.
4.1 Oct 05, 2015	Important: perfected UI effect for any system DPI setting, in any supported Operating Systems (system DPI setting: in Windows 7, it can be changed at "Control Panel -> Appearance and Personalization -> Display -> Make text and other items larger or smaller"). Optimized an English text.	100% clean, but Microsoft Security Essentials will report the "Trojan:Win32/Spallowz.A!plock" virus. Just caused by a specific language texts combination.
4.0 Sep 05, 2015	Important: fully supports native Deutsch. Important: fully supports native Türkçe. Important: supports Windows 10. Important: Optimized the main interface, especially, perfected the spacing, margin, position and size of the controls in "Output settings" area for all languages. Optimized a Slovenčina text. Optimized two Traditional Chinese texts.	Important: in Slovenčina version, if selected "All" pages, it cannot work. Press <Enter> on system dialog boxes will open the selected PDF file in the list. The texts of Traditional Chinese installer are too small in Windows 10.
3.6 Aug 07, 2015	Important: fully supports native Slovenčina. Optimized English, Magyar, Polski, Português (Brasil) and Português (Portugal) texts.	In the extreme case, the language choosing menu may cause a serious internal error.
3.5 Aug 05, 2015	Optimized the bottom margins of "Customize Output Path" related buttons.	The bottom border of "Output Settings" is covered.
3.4 Jul 28, 2015	Important: fully supports native Português (Portugal). Optimized two Português (Brasil) language texts.
3.3 Jul 17, 2015	Important: fully supports native Polski. Important: fully supports native Magyar. Optimized the user interfaces: unified font name and size, adjusted the size and location of some controls. Uses balloon tooltips. Optimized the title of the message boxes: changed "PTJ" to "PDF to JPG". Optimized the 简体中文 & 繁體中文 language texts. Added company logo to the "About..." interface, and links to company homepage.
3.2 Jun 15, 2015	Important: supports Command Line Interface (CLI). Important: supports multi-language. Important: fully supports native Portuguese (Brazil), 简体中文 and 繁體中文. Important: now the installer supports multi-language also, and let you choose when install. Even, PTJ can directly use the language that selected during installing. Important: uses Golden Ratio for the main interface and its start position. Supports to open the selected PDF by pressing <Enter> key. Optimized the source code to improve efficiency. Shortened the executable file name ("PDF to JPG.exe") as "PTJ.exe", in order to facilitate Command Line call. Optimized the location of the drop-down menus on the main interface. Allows you to run multiple instances. Open translation interface for multi-language version.	Important: this function cannot work: double-click an item to open the corresponding PDF file. Important: pressing <Del> in the pages selector or resolution inputter will remove the selected item from list. Important: if accidentally deleted the resolution, the conversion will occur error.
3.1 Oct 20, 2014	Important: supports to set the Resolution (Pixels / Inch) and Colors (True or White & Black) for the output images. Important: supports shortcut keys for all operations on the main interface. Moved all actions which need to run the default eMail client to the online webpages, in order to avoid the confusion if who has not a default eMail client. Optimized resource utilization to reduce the sizes of installer and executable file. Redesigned the licenses. Adds 5 menu items "Find Us on Facebook/Twitter/Google+, PDF Helper Solution Homepage, Company Homepage" to the <Help> button's drop-down menu on the main interface, and change the "Home Page" menu item to "Product Homepage" Optimized the definition of "Lock" and "Unlock" icons in the listing. Optimized the user interfaces and documents.
3.0 Jul 29, 2013		Sometimes, the image files are outputted successfully, but the interface says "Error Occurred". Sometimes, when do the second or more conversions, PDF to JPG will prompt the file does not exist. Sometimes, PDF to JPG will prompt you to input the password even the PDF file has not any password. Above 3 bugs always occur when the PDF file has a non-English filename or is located in a non-English path.
2.2 Jan 13, 2013	Supports to drag and drop PDF files to the listing. Added Team License for the organizations. Optimized the website and documentation.	Do not quit adding when selected a duplicate PDF file, just skip it.
2.1 Jul 24, 2012	Supports specifying page range to convert.
2.0 Dec 19, 2011	Supports viewing the original PDF files. Supports converting the password-protected PDF files. Shows prompt if there are converted files.
1.2 Jun 05, 2011	Supports new output type - GIF.
1.1 Nov 21, 2010	Adds <Open Result> button to the selected item.
1.0 Apr 02, 2010	New release.

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主題：軟體推薦 - PDF 轉換圖片：轉換 PDF 為 JPG/PNG/BMP/TIF/GIF/PCX/TGA 圖片（來自 ‘您的名稱’）

正文：
您好，

我正在使用 PDF 轉換圖片軟體，它用來以批量方式轉換 PDF 檔為 JPG、PNG、BMP、TIF、GIF、PCX 及 TGA 圖片，不必安裝 Adobe Acrobat 或 Adobe Reader 即可工作，且擁有命令列介面（CLI）、快速而精確的轉換能力、友好的圖形化使用者介面（GUI）、小巧等特點。

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直接下載：https://www.pdf-helper.com/files/pdf2jpg.zip