Chỉnh sửa PDF
Thêm văn bản, hình ảnh, hình vẽ, khối hình và tô sáng vào file PDF của bạn.
About Edit PDF
A Full PDF Editor That Runs in Your Browser
OxygenPDF’s editor opens your PDF in a live canvas where you can add text, drop in images, draw freehand, place shapes, highlight areas, and stamp pages — all without installing anything. Changes show up in real time as you work.
The tool supports over a dozen annotation types: text boxes with font control, freehand drawing and highlighter pens, rectangles, circles, lines, arrows, sticky notes, callouts, stamps with four style variants, whiteout for redacting content, and text markup (highlight, strikethrough, underline). You can also reorder pages, insert blank pages, rotate, and delete pages directly in the editor.
What You Can Do
Edit PDF covers the full range of annotations and page operations. Here are some of the things people use it for most.
Add Text & Callouts
Place text boxes anywhere on the page. Choose font, size, color, bold, italic, alignment. Callouts include a leader line pointing to a specific spot.
Draw & Highlight
Freehand pen for sketching, freehand highlighter for marking up content. Both with adjustable stroke width and color.
Insert Images & Signatures
Drop images onto any page, resize and position them. The signature tool lets you draw, type, or upload a signature and place it where it belongs.
Stamps & Symbols
Predefined stamps like APPROVED, DRAFT, CONFIDENTIAL in multiple styles. Symbol tool for placing checkmarks, crosses, and custom characters.
Undo History and Page Management
Every action gets tracked in a unified undo/redo timeline. Add an annotation, move it, change its color, delete it — each step is recorded and reversible. The history panel shows exactly what happened and when.
Page management is built into the same editor. Reorder pages by dragging thumbnails in the side panel, rotate individual pages, insert blank pages between existing ones, duplicate pages, or delete them. All of it goes through the same undo system.
How It Compares
Browser-based PDF editors range from basic annotation tools to near-desktop experiences. Here’s where OxygenPDF sits.
| Tính năng | OxygenPDF | Adobe Acrobat | Sejda |
|---|---|---|---|
| Text, images, shapes, drawing | |||
| Freehand highlighter | |||
| Stamps with multiple styles | |||
| Sticky notes & callouts | |||
| Text markup (highlight, strike, underline) | Partial | ||
| Page reorder, rotate, delete, insert | |||
| Undo/redo history timeline | |||
| No file upload required | Desktop only | ||
| Free to use | Limited |
Your Edits Never Leave Your Device
PDFs that need editing tend to be exactly the files you wouldn’t want on someone else’s server: contracts, legal filings, medical forms, HR documents. Most online editors upload your file for processing.
OxygenPDF runs the entire editor in your browser. Your PDF stays on your machine. Annotations are rendered and serialized locally. The final output downloads straight to your device. Shut the browser and there’s nothing left behind.
Chỉnh sửa PDF: Câu hỏi thường gặp
Các câu hỏi thường gặp về công cụ này và cách thức hoạt động.
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Tiếp tục xử lý các tệp PDF của bạn
Nén PDF
Giảm dung lượng tệp nhưng vẫn tối ưu chất lượng hiển thị.
Bảo vệ PDF
Mã hóa tệp PDF của bạn bằng mật khẩu.
Ký PDF
Thêm chữ ký điện tử vào tài liệu PDF của bạn.
Tách PDF
Tách một tệp PDF thành các trang riêng lẻ hoặc từng tệp nhỏ.
Chú thích PDF
Tô sáng, gạch chân, thêm ghi chú dán, con dấu và nhận xét mà không làm thay đổi nội dung gốc.
Chèn hình mờ (Watermark)
Thêm hình mờ dạng văn bản, hình ảnh hoặc hoa văn lặp lại vào file PDF.