免费 PDF 工具 — 压缩、合并、转换

超安全、闪电般的 PDF 解决方案

具有 AI 驱动功能的专业 PDF 管理。您的文件将保留在您的设备上，绝对私密。

PDF 工具
AI 摘要
AI PDF 对话
Markdown 编辑器
朗读

100% 私密

文件永远不会离开您的设备。

100% 本地

在浏览器中运行，也可离线使用。

无需注册

永久免费。无需账号或邮箱。

100% 私密

文件永远不会离开您的设备。

100% 本地

在浏览器中运行，也可离线使用。

无需注册

永久免费。无需账号或邮箱。

What do you need to do?
Reduce File Size

Compress to any target size. No watermarks.

Convert Documents

PDF to Word, Excel, PPT and back. No uploads.

Secure Your PDF

Password protect, redact, or sign. Fully private.

AI Tools

OCR, redact, auto-rename — all private, no upload.

May 2026

Convert large PDFs locally

Step-by-step guides — same workflow as the tools: your files stay in the browser. Jump in, or read first.

Merge PDF

Packets, diligence, invoices — one file.

PDF to images

Slides and scans to crisp images.

PDF to Word

Editable DOCX from scans.

PDF to Markdown

Research into linked notes.

PDF to JSON / CSV

Statements without cloud parsers.

PDF to text

Plain text from huge PDFs.

Compress to exact size:

50 KB
100 KB
150 KB
200 KB
250 KB
300 KB
400 KB
500 KB
600 KB
800 KB
1 MB
1.5 MB
2 MB
3 MB
5 MB
10 MB
25 MB

No watermarks · No upload limits · 100% offline

Specialized & regional:

JPEG to PDF
Photo to PDF
Image to PDF Converter
PDF Data Compression
Compress PDF (100 KB)
PDF Compress कैसे करें
PDF Merge कैसे करें
PDF Resize कैसे करें
PDF Editor कैसे करें
Photo to PDF कैसे करें
Image se PDF Banaye
AI-Powered
AI PDF Summarizer

Summarize any PDF instantly using AI — no upload required

AI Chat with PDF

Ask questions about any PDF using AI that runs in your browser

智能自动重命名

AI 驱动的文档重命名

AI 文本提取

将扫描的 PDF 转换为可编辑文本

智能编校

自动检测并编校敏感数据

签证和证件照

制作符合要求的护照和签证照片

PDF 朗读

用文本转语音朗读 PDF，可选择声音、速度和风格

Convert Documents
PDF转Word

将PDF转换为可编辑的Word文档

Word to PDF

Convert Word documents to PDF in your browser

PDF转PowerPoint

将PDF页面转换为可编辑的PPTX幻灯片

PDF转Excel

将PDF数据转换为Excel电子表格

Office转PDF

将DOCX、PPTX、XLSX转换为PDF

HTML to PDF

Convert HTML code to PDF document locally

Text to PDF

Create PDF documents from plain text online

PDF转文本

提取PDF文件中的所有文本内容

PDF 转 Markdown

将 PDF 文档转换为干净的 Markdown 格式

PDF to JSON / CSV

Extract tables from PDF and download as JSON or CSV — automatic table detection, 100% local

LaTeX to PDF

Render LaTeX equations and documents to PDF in your browser. KaTeX math, sections, tables — no install needed

Markdown Tools
Markdown转PDF

将Markdown文件转换为样式化的PDF

Markdown编辑器

带实时预览的在线Markdown编辑器

Markdown转HTML

将Markdown转换为干净的语义化HTML

Markdown转Word

将Markdown转换为格式化的Word文档

Markdown表格生成器

可视化创建Markdown表格

Markdown转图片

将Markdown转换为PNG图片用于分享

PDF 转 Markdown

将 PDF 文档转换为干净的 Markdown 格式

More Tools
Crop PDF

Remove margins and trim PDF pages

PDF阅读器

在浏览器中查看和阅读PDF文件

旋转PDF

永久旋转页面。横向变纵向。

比较PDF

并排直观比较两个PDF版本

修复PDF

从损坏的文件中恢复数据

保护和解锁

加密或解密 PDF 文件

交互式表单

创建包含文本字段和复选框的可填写PDF表单

门户优化器

调整文件大小以适应严格的上传限制

添加水印

为PDF添加文字或图片水印

PDF电子签名

使用数字签名签署文档

扫描转PDF

通过相机扫描并自动增强

添加页码

为PDF文档添加可自定义的页码

解锁PDF

移除PDF文件的密码保护

提取页面

选择并提取PDF中的特定页面

Organize PDF

Reorder, rotate, or delete pages in any PDF

PDF批注

为PDF文档添加高亮、下划线和批注

QR转PDF

生成多个QR码作为可打印的PDF

Batch Convert

Convert multiple PDF files at once

Flatten PDF

Convert PDF form fields and annotations to static content

PDF to PDF/A

Convert PDF to ISO 19005 PDF/A format for long-term archiving

Resize PDF to A4

Convert all PDF pages to A4, Letter, A3, A5, or Legal format

NEW

Markdown Suite — Write, Convert & Export

A full Markdown toolkit alongside our PDF tools. Edit with live preview, export to PDF, Word, HTML or PNG — all 100% in your browser.

✍️ Markdown Editor

Live preview, syntax highlight

📄 to PDF

Clean PDF export, print-ready

🌐 to HTML

Semantic, clean HTML output

📝 to Word

Export as .docx instantly

🖼️ to Image

Download as PNG for sharing

⚗️ LaTeX to PDF

Math equations, tables, sections

NEW

Data Tools — JSON & Structured Data

Edit, validate, and convert JSON. Transform between JSON, Markdown, and PDF — all in your browser.

{ } JSON Editor

Format, validate, tree view

📄 JSON to PDF

Print-ready JSON documents

📝 JSON to Markdown

Tables, lists, sections

🔄 Markdown to JSON

Extract structured data

From the Blog

Guides for merge, images, Word, Markdown, data extraction, and OCR — plus comparisons when SaaS tools let you down.

Merge
Combine PDFs to 150MB — Browser, No Upload

Merge diligence and scan bundles with zero upload — privacy you can verify in DevTools.

Images
PDF to JPG/PNG — 150MB Local (2026)

Rasterize big PDFs without a converter API — bounded by RAM, not marketing tiers.

Merge
Add Cover Page Then Merge PDF — Local

Board packs: branded cover first, body second — up to ~150MB per file, no watermark.

Markdown
PDF to Markdown for Notion & Obsidian

Research PDFs into linked notes — headings become Markdown for your second brain.

Data
PDF Tables to JSON/CSV — Finance Local

Statement grids to structured data without uploading to random “AI extractors.”

Comparison
Smallpdf vs ExactPDF 2026

Caps, uploads, and watermarks — why browser-local processing wins for professionals.

Works When Other PDF Tools Won't

Built for the specific moments when popular tools fail you — file too large, watermarks, corporate blocks, or no internet.

PDF rejected — file too large for email, portal, or govt site?

Set an exact output size. ExactPDF compresses to 100 KB, 500 KB, 1 MB or 2 MB — no upload limit, no paid tier. Works on scanned, image-heavy PDFs too.

→ 50 KB
→ 100 KB
→ 200 KB
→ 300 KB
→ 500 KB
→ 800 KB
→ 1 MB
→ 2 MB
→ 5 MB
→ 10 MB
→ 25 MB
Portal Optimizer

Compress or convert PDFs without a watermark?

ExactPDF never stamps your documents. No "Processed by ExactPDF" branding. Compress, merge, convert — free forever, watermark-free by default.

Compress — no watermark
Merge — no watermark
Convert — no watermark

iLovePDF or Smallpdf blocked by your IT team or Zscaler?

Those tools upload your files to external servers — exactly what corporate DLP and proxy filters block. ExactPDF runs 100% in your browser. Nothing leaves your device, so there's nothing to block.

Try it — no upload
vs iLovePDF
vs Smallpdf
vs Sejda

Chat with a PDF or summarize it without uploading?

Our AI model runs locally in your browser via WebAssembly. Ask questions about any document, extract key points, or get an instant summary — your file never leaves your device.

Chat with PDF (offline)
Summarize PDF
OCR Text

Why ExactPDF?

以下是您确认文件从未离开设备的方法

零服务器处理

所有 PDF 操作都在您的浏览器中本地进行。您的文件从未离开您的设备。

端到端隐私

无文件上传，无云存储，无数据收集。设计上完全隐私。

闪电般快速

本地处理意味着更快的操作，没有网络延迟或服务器排队。

开放与透明

ExactPDF 采用开源库构建，遵循隐私优先的架构。我们相信透明度。

工作原理
1

使用File API选择文件 — 保留在浏览器内存中

→

2

JavaScript库完全在您的设备上处理文件

→

3

结果直接下载 — 服务器永远看不到您的数据

任何步骤都不涉及服务器

核心库： pdf-lib • PDF.js • Tesseract.js • Sharp • QRCode

MIT 许可库
100% 客户端处理

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