Editing PDF conversion (section)

==== PDF 轉換成純文字 (TXT) ====
* {{Gd}} [http://pdftextonline.com/ PDF Text Extraction In Your Browser - PDFTextOnline]線上服務，擷取PDF檔中的文字。(檔案大小不能超過10M) ([http://www.box.net/shared/pyve05ss4c 中文測試ok]，測試日期: 2008-12-07。)

* [https://www.ghostscript.com/ Ghostscript] on {{Win}} & {{Linux}}<ref>[https://apple.stackexchange.com/questions/2487/how-to-convert-a-pdf-file-into-a-text-file How to convert a pdf file into a text file? - Ask Different]</ref>

* [http://www.convertpdftotext.net/ Convert pdf to Text - Convert pdf to txt - Convert online pdf to Text] ([http://www.box.net/shared/pyve05ss4c 中文變亂碼]，測試日期: 2008-12-07。)

* [http://www.zamzar.com/ Zamzar - Free online file conversion]線上服務: PDF轉成TXT ([http://www.box.net/shared/pyve05ss4c 中文變亂碼]，測試日期: 2008-12-07。)

* ([[OCR]]) [https://pdfcandy.com/tw/pdf-ocr.html PDF 轉文字–免費線上OCR轉換工具] 免費版限制：一小時轉換一個檔案，檔案大小也有限制{{access | date=2022-10-07}}

[https://www.xpdfreader.com/pdftotext-man.html pdftotext] ([[Convert pdf to txt|Quick Start]])
* On {{Win}}: Part of [https://www.xpdfreader.com/index.html XpdfReader], dual licensed under GPL v2 and GPL v3<ref>[https://www.xpdfreader.com/opensource.html Xpdf Open Source]</ref>
* On {{Mac}} & {{Linux}}: Part of [https://poppler.freedesktop.org/ Poppler]<ref>[https://brewinstall.org/install-pdftotext-mac-osx/ Install pdftotext on Mac OSX - Brew Cask | BrewInstall]</ref> (GPL v2 or later), historically derived from Xpdf ([https://en.wikipedia.org/wiki/Pdftotext Wikipedia]) {{access | date=2023-06-02}} {{Gd}}
* Usage: {{kbd | key=<nowiki>pdftotext [options] [PDF-file [text-file]]</nowiki>}} e.g. {{kbd | key=<nowiki>pdftotext -enc UTF-8 example.pdf example.txt</nowiki>}}

[https://github.com/py-pdf/pdfly py-pdf/pdfly: CLI tool to extract (meta)data from PDF and manipulate PDF files] "A {{Acronym| acronym=CLI| def=命令列介面（英語：Command-line interface）}} application that uses [https://github.com/py-pdf/pdfly pypdf] to interact with PDFs."
* License: [https://github.com/py-pdf/pdfly/blob/main/LICENSE BSD 3-Clause License] {{Gd}}
* Usage: {{kbd | key=<nowiki>pdfly extract-text PDF-file > text-file</nowiki>}}
* Known issues: On Windows systems with Chinese locales (cp950), PDF text extraction may fail with Unicode encoding errors when encountering certain special characters like '\u25aa' (BLACK SMALL SQUARE). This is a character encoding limitation of the default Windows codepage<ref>[https://stackoverflow.com/questions/50933194/how-do-i-set-the-pythonutf8-environment-variable-to-enable-utf-8-encoding-by-def How do I set the PYTHONUTF8 environment variable to enable UTF-8 encoding by default in Python? - Stack Overflow]</ref>.
* Requirement: [https://www.python.org/downloads/ Python]

[https://github.com/ArtifexSoftware/mupdf mupd] (part of [https://mupdf.com/core MuPDF])
* License: [https://github.com/ArtifexSoftware/mupdf?tab=AGPL-3.0-1-ov-file GNU AFFERO GENERAL PUBLIC LICENSE]
* Usage: {{kbd | key=<nowiki>mutool draw -F txt -o PDF-file text-file</nowiki>}}