快速的 PDF 与图片工具，尊重你的隐私
合并、拆分、转换、压缩、调整尺寸与提取文字 — 全部直接在你的浏览器中运行，文件不会离开设备。
选择工具
16 个免费工具 — 无需注册、无水印、无每日次数限制。
合并 PDF
Combine multiple PDF files into one document, in the order you choose.
打开工具 →拆分 PDF
Extract the page ranges you need from a PDF and download a new document.
打开工具 →提取页面
Save chosen pages from a PDF as a brand-new document.
打开工具 →旋转 PDF
Rotate every page or only selected pages by 90°, 180° or 270°.
打开工具 →PDF 编辑器
Reorder, rotate, delete or duplicate pages, add page numbers, a watermark or your signature — then download.
打开工具 →Organize PDF Pages
Put the pages of a PDF in any order — drag to rearrange, rotate, duplicate, delete, add blank pages and export 1, 2, 4, 6 or 9 pages per sheet.
打开工具 →PDF Text Editor
Add text, place an image or a logo, and erase anything you no longer want — page by page, straight on the document.
打开工具 →PDF 转 Word
Convert a PDF into an editable Word (.docx) document — scanned files included, OCR in 30+ languages.
打开工具 →PDF 转 Excel
Convert PDF tables into an Excel (.xlsx) spreadsheet with correct columns — scans supported.
打开工具 →Word to PDF
Convert a Word document (.docx) into a PDF — headings, bold and italic text, tables and images are carried over.
打开工具 →Excel to PDF
Print an Excel or CSV spreadsheet as a clean PDF: every sheet becomes a bordered table that fits the page width.
打开工具 →PDF 转 JPG
Turn every page of a PDF into a high-quality JPG image.
打开工具 →PDF 转文本
Pull the selectable text out of a PDF, page by page.
打开工具 →压缩 PDF
Shrink heavy PDF files by rebuilding pages as optimized images.
打开工具 →JPG 转 PDF
Combine JPG, PNG or WebP images into a single PDF document.
打开工具 →图片压缩
Reduce the file size of JPG, PNG or WebP images.
打开工具 →调整图片尺寸
Resize an image by width and height.
打开工具 →图片格式转换
Convert images between JPG, PNG and WebP formats.
打开工具 →图片转文字
Extract text from any photo or screenshot with OCR in 30+ languages, including Maithili, Hindi and Bengali.
打开工具 →移除背景
Remove the background from a photo and download a transparent PNG.
打开工具 →Crop PDF
Trim the margins of every page by the exact amount you need.
打开工具 →Page Numbers
Number every page exactly the way you want — position, size and format.
打开工具 →Watermark
Stamp text across every page — choose the wording, size, transparency and angle.
打开工具 →Redact PDF
Black out every occurrence of a word, name or number in a PDF.
打开工具 →Compare PDF
Put two versions of a document side by side, page by page.
打开工具 →OCR PDF
Add a text layer to a scanned PDF so it becomes searchable and selectable.
打开工具 →Unlock PDF
Open a password-protected PDF and save a copy without the password.
打开工具 →Repair PDF
Rebuild a damaged or corrupt PDF and recover the pages it still holds.
打开工具 →PDF to Markdown
Turn a PDF into clean Markdown — headings, lists and links detected for you.
打开工具 →搜索工具…
使用步骤
选择工具
挑选你需要的 PDF 或图片工具，无需注册账号。
添加文件
把文件拖进来，处理直接在你的设备上进行。
下载结果
立即获得输出文件，服务器不会保存任何内容。
Available in 34 languages
Every tool stays in your language — switch anytime, no reload needed.
常见问题
我的文件会上传到服务器吗？
不会。每个工具都在你的浏览器中运行，文档和图片不会离开你的设备。
PDFKaj 真的免费吗？
是的 — 16 个工具全部免费，无需注册，没有水印，也没有每日限制。
扫描版 PDF 可以转换吗？
可以。当 PDF 没有可选文字时，PDF 转 Word 和 PDF 转 Excel 会自动使用 OCR。
支持哪些语言？
网站提供 34 种语言，OCR 可识别 30 多种语言。
PDFKaj — 免费 PDF 与图片工具，保护你的隐私
合并、拆分、压缩、PDF 转 Word、PDF 转 Excel、OCR 识别与调整尺寸 — 全部在浏览器中完成，文件不会上传到服务器。