文档与图片工具
免费在线工具编辑PDF和图片
PDF工具
PDF转换器
将Word、Excel、PPT、图片转换为PDF
合并文件
将PDF、图片和办公文档合并为一个PDF
拆分PDF
将PDF拆分为多个文件
压缩PDF
减小PDF文件大小
旋转PDF
旋转PDF页面
PDF水印
为PDF添加文字或图片水印
PDF裁剪
裁剪PDF页面边距
PDF 加密
使用密码保护您的 PDF 文件
PDF解锁
解除密码保护的PDF文件
PDF 转 Word
将 PDF 文档转换为可编辑的 Word 文件
PDF 转 Excel
将 PDF 文档转换为可编辑的 Excel 电子表格
PDF 转 PowerPoint
将 PDF 文件转换为可编辑的 PowerPoint 演示文稿
PDF OCR
从扫描的PDF中提取文本
编辑 PDF
向 PDF 添加文本、高亮和形状
PDF 比较
比较两个 PDF 文件并突出显示差异
PDF敏感信息删除
永久删除PDF中的敏感信息
Markdown 转 PDF
将Markdown转换为带有语法高亮和Mermaid图表的PDF
图片工具
How to choose the right tool
Use PDF tools when your source is document-first and layout fidelity matters, and use image tools when your source is visual-first and pixel editing is the priority. For mixed workflows, convert or normalize files first, then run merge, split, compress, watermark, or OCR in a second pass.
The fastest way to avoid quality loss is to keep each step focused: convert once, edit once, and export once. Repeated re-encoding can degrade text, color, or scan readability, especially on small or compressed source files.
Processing quality and practical limits
- Output accuracy depends on source quality, embedded fonts, scan contrast, and document structure.
- For legal, finance, or compliance workflows, always verify final files before submission or sharing.
- If a document includes many mixed formats, run conversion first and then process in smaller batches for stable results.
Learn with practical examples
If you want detailed workflows and scenario-based guidance, start with the blog guides below. They explain when to use each tool, how to reduce processing failures, and how to keep output quality high in real operations.