tool_pdf_image_compressor

PDF 图片压缩与页面移动工具

A PyQt6 desktop application to compress images inside PDF files (by DPI or long‑side scaling) and move pages within a PDF. Features real‑time before/after preview, per‑image custom settings, drag‑and‑drop support, and a bilingual (English/中文) interface.

自用的 压缩 pdf 图片的小工具

说明

• 主要通过 pymupdf 这个库实现（注意 1.24以后版本，用 import pymupdf 不再是 fitz,本项目暂用 老的 fitz写法）
• 如果需要 epub 版 压缩图片工具，可前往另一个 git 仓库(sigil 插件)

技术细节

• pdf 不支持 .webp，所以全部转 .jpg
• 支持设置预览
• 支持 dpi 或 最长边（px），支持单图片自定义

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Features

• Image compression
  • Reduce file size by resizing images using maximum DPI or maximum long side (pixels)
  • Adjust JPEG quality with live preview
  • Global settings for all images + per‑image custom overrides
• Page moving
  • Move a page range to the end of the document, with automatic ToC adjustment
• Real‑time preview
  • Original vs. compressed side‑by‑side, fixed‑size preview panels
  • Preview updates instantly when any slider/value changes
• Convenient workflow
  • Drag & drop PDF files onto the image list
  • Check/uncheck images to include/exclude them from processing
  • Subset fonts before saving (optional)
• Multilingual
  • Switch between English and 中文 via the menu bar; language choice is saved automatically

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Screenshot 截图

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Installation & Usage

Prerequisites

• Python 3.8 or higher
• pip

1. Clone the repository

git clone https://github.com/fun-tailor/tool_pdf_image_compressor.git
cd tool_pdf_image_compressor

2. Install dependencies

pip install -r requirements.txt

requirements.txt

PyQt6
PyMuPDF
Pillow

3. Run the application

python main.py

How to use

1. Compress images

   • Click Open PDF or drag a PDF onto the left panel.
   • Select an image from the list to see the preview.
   • Adjust global parameters (mode, DPI/side, quality) – the preview updates automatically.
   • To set custom parameters for a single image, toggle Use Custom Settings and modify the sliders/values.
   • Tick/untick images as needed.
   • Click Compress & Save As… and choose an output path.

2. Move pages

   • Switch to the Page Move tab, open a PDF, set the page range, and click Move to End & Save As….

3. Switch language

   • Use the Language menu in the menu bar. The choice persists across restarts.

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Project Structure 项目结构

.
├── main.py            # 入口 Application entry point, menu bar, language switching
├── compress_tab.py    # Image compression tab (main UI logic)
├── move_tab.py        # Page moving tab
├── worker.py          # Background thread for PDF processing
├── utils.py           # Helper functions (compression, pixmap, etc.)
├── assets/
│   └── screenshots/
│       └── screenshot.webp
├── README.md
└── requirements.txt