37 款免费 PDF 工具集于一处。编辑、合并、拆分、压缩、签名、OCR，外加内置 AI 用于对话、学习和撰写。无需注册，无水印。
iLovePDF and SmallPDF lock these behind Premium. Here they're built-in and free.
Ask anything about any PDF. Instant answers with page citations.
Try freeAuto-generate summaries and flashcards. Study 3× faster.
Try freeDetect changes in contracts and quotes automatically.
Try freeGenerate contracts, letters and reports in seconds.
Try free高级合并功能，支持拖放重排和页面配置。
TOP专业拆分，具有可视化选择、多种模式和批量处理功能。
精确的页面提取，具有交互式选择和高级过滤器。
从PDF文件中提取所有嵌入的图像，支持预览和选择。
专业旋转，具有单页控制和实时预览功能。
添加专业页码，支持多种样式、格式和自定义文本。
TOP智能压缩，具有质量设置、预览和专业优化功能。
修复损坏的PDF文件并恢复内容。
Extract text from scanned PDFs and images using OCR technology.
将PDF文档转换为可编辑的Word文件。
从PDF提取表格和数据到Excel电子表格。
将PDF演示文稿转换为可编辑的PowerPoint幻灯片。
将PDF页面转换为高质量JPG图像。
将PDF文档转换为HTML网页。
将PDF转换为可存档的PDF/A格式，用于长期保存。
将Word文档转换为专业PDF文件。
将Excel电子表格转换为PDF文档。
将JPG图像转换为PDF文档。
将HTML代码转换为专业PDF文档。
将PowerPoint演示文稿转换为PDF格式。
完整的PDF编辑套件，包含文本、图像、注释等功能。
创建和编辑具有多种字段类型和专业表单管理功能的交互式PDF表单。
添加文字或图片水印来保护您的PDF文档。
使用可视化编辑器裁剪PDF页面并调整边距。
查看和编辑PDF元数据，如标题、作者、关键词和其他文档信息。
专业坐标检测，用于精确定位和文档编制。
TOP先进的数字签名解决方案，支持多页签名和专业印章。
准备并发送具有法律约束力验证的电子签名文档。
为PDF添加密码保护，采用AES-256加密和自定义权限。
当您知道密码时删除PDF的密码保护。
TOP从PDF生成摘要和闪卡。非常适合学习。
AI使用AI询问关于PDF文档的问题。获得即时答案和摘要。
AI使用AI将PDF文档翻译成任何语言，支持并排比较。
TOP使用 AI 生成 Word 和 PDF 文档。合同、信函、报告等，几秒内即可完成。
使用 AI 将手写笔记转换为专业 PDF，完整保留图画和图表。
NEWCompare budgets, contracts and documents. Detect price changes and modified clauses with AI.
通过可视化编辑器从零开始设计 PDF。几分钟内添加文本、形状、图像和表格。
NEW使用AI辅助创建专业简历，导出为PDF。
Built with privacy, speed and simplicity in mind. No compromises.
Files are processed in your browser and auto-deleted. We never store your documents.
Instant browser-based processing. No waiting, no queues, immediate results.
Use all tools free with no account required. No annoying ads or hidden limitations.
AI-powered tools to translate, study, chat with, and create documents intelligently.
The tools you need, without the friction you expect.
Summarize books and notes, generate flashcards, translate papers, draft your thesis and export to PDF in minutes.
Sign contracts online, redact sensitive info, compare proposal versions, compress attachments for email.
Generate invoices and contracts with AI, collect digital signatures, share fillable forms and digitize paper docs.
Integrate any tool via REST API. Pay-as-you-go, no annual contract or enterprise sales gate.
Honest comparison. Where we don't win, we say so.
| Feature | WHAT A PDF! | iLovePDF | SmallPDF | Adobe Acrobat |
|---|---|---|---|---|
| Free unlimited use | ✓ Always | Daily limits | 2 tasks/day | ✗ Trial only |
| AI tools included | ✓ 9 included | ✗ | Pro only | Pro only |
| No signup required | ✓ | Advanced needs login | ✗ Required | ✗ |
| Max file size | ✓ 100 MB | 25 MB free | 5 MB free | 100 MB |
| Languages supported | ✓ 15 | 25 | 22 | 30+ |
| Browser-based processing | ✓ | Server-side | Server-side | ✓ Web/Desktop |
| REST API | ✓ Pay-as-you-go | ✓ Yearly plan | ✗ | ✓ Enterprise |
| Pro price | €7,99/mo | €7/mo | €12/mo | €23,99/mo |
The things people most ask us before getting started.
Yes. All 37 tools are free for unlimited use, no watermarks, no required signup. We have an optional Premium plan (€7.99/mo) that unlocks larger file sizes and priority processing, but 95% of users never need it.
For basic tools (merge, split, rotate, compress, extract pages) processing happens in your browser — the PDF never leaves your device. For tools that need heavy processing (OCR, AI, Word/Excel conversion) the file is uploaded to our European servers, processed, and auto-deleted within 1 hour. We never store or train AI on it.
Yes. All tools work without signup. An account is only required if you want to save signatures, see document history, or use collaboration features like form sharing.
Yes. The interface is responsive and works well on iOS, Android, and iPad. Some advanced tools (PDF editor, complex annotations) are optimized for larger screens but all are accessible.
On the free plan, up to 100 MB per file. The Premium plan raises the limit to 500 MB. This covers 99% of everyday documents (a 100-page PDF with images is typically 5–20 MB).
Yes. Use the OCR tool first to convert the scanned PDF to editable text, then pass it to the PDF Editor. OCR supports 100+ languages with high accuracy thanks to AI.
Yes. We operate from Spain (EU), our servers are in the EU, and our privacy model is "process-and-delete": no PDF is stored longer than 1 hour unless you choose to save it in your account. Our privacy policy details DPAs if your organization needs them.
ChatGPT has a file-size limit when you upload PDFs (around 25 MB per upload). Our Chat with PDF handles documents up to 1,000 pages and indexes them to answer with exact page citations. Plus processing is per-document — your PDFs aren't mixed into training data.
Install the Chrome extension to open Gmail PDFs in one click, or plug in our REST API if you're building something.
