A powerful all-in-one PDF editor. Sign, seal, scan, merge, split, compress, watermark, encrypt, and OCR — everything you need in one app, with zero ads and complete privacy.
强大的一站式 PDF 编辑器。签名、盖章、扫描、合并、拆分、压缩、水印、加密、OCR——你需要的一切尽在一个应用，零广告，完全隐私。
Draw, highlight, underline, strikethrough, add arrows, rectangles, circles, text, and images. Full annotation toolkit for any document.
绘画、高亮、下划线、删除线、箭头、矩形、圆形、文字和图片。完整的文档标注工具集。
Add handwritten digital signatures and professional seals to your PDFs. Save and reuse signatures across documents with flexible positioning.
为 PDF 添加手写电子签名和专业印章。签名可保存复用，支持灵活定位和缩放。
Convert paper documents to PDF via camera. Smart edge detection and perspective correction for clean, professional scans.
通过摄像头将纸质文档转为 PDF。智能边缘检测和透视校正，生成清晰专业的扫描件。
Combine multiple PDFs into one or extract specific page ranges. Batch merge supported for maximum productivity.
将多个 PDF 合并为一个，或提取指定页面范围。支持批量合并，提升工作效率。
Reduce PDF file size with adjustable quality levels (low, medium, high). Perfect for sharing large documents via email or messaging apps.
支持低、中、高三种质量等级压缩 PDF 文件大小。适合通过邮件或即时通讯分享大文件。
Extract text from scanned documents and images. Supports Chinese, Japanese, and more languages for accurate text recognition.
从扫描文档和图片中提取文字。支持中文、日文等多语言精准文字识别。
Password-protect your PDFs with security permissions. Add custom watermarks with adjustable text, opacity, size, rotation, and color.
为 PDF 设置密码保护和安全权限。添加自定义水印，可调整文字、透明度、大小、旋转和颜色。
Reorder, rotate, and delete pages within your PDF. Full control over document structure without needing a desktop app.
对 PDF 页面进行重新排序、旋转和删除。无需桌面软件即可完全掌控文档结构。
Convert images to PDF, PDF to images (PNG/JPG), and Word/Excel documents to PDF. One app handles all your conversion needs.
图片转 PDF、PDF 转图片（PNG/JPG）、Word/Excel 转 PDF。一个应用满足所有格式转换需求。
Smooth PDF viewing with zoom, rotation, multi-tab support, bookmarks, text search, form filling, and 4 reading modes including Night mode.
流畅的 PDF 阅读体验，支持缩放、旋转、多标签、书签、文字搜索、表单填写和 4 种阅读模式（含夜间模式）。
Available in English, Chinese, Japanese, Korean, Arabic, German, French, Spanish, Hindi, and 14 more languages worldwide.
支持中文、英文、日文、韩文、阿拉伯文、德文、法文、西班牙文、印地文等 23 种语言。