Tối ưu

Repair PDF

Recover pages and rebuild corrupted xref structures from damaged PDFs locally. Chạy trên thiết bị này

Thêm tệp của bạn

Tài liệu của bạn chỉ nằm trong thẻ trình duyệt đang mở.

Chỉ tệp PDF

Thả một tệp vào đâyhoặc chọn từ thiết bị của bạnChọn tệpChỉ tệp PDF

Choose a local file to begin.

Không có hàng đợi tải lên

Tài liệu của bạn chỉ nằm trong thẻ trình duyệt đang mở.

Không cần tài khoản

Không có đăng nhập, hạn mức xử lý hàng loạt hay kho tệp trên máy chủ.

Xoá khi xong

Hãy dùng nút xoá để giải phóng dữ liệu tác vụ ngay lập tức.

Hướng dẫn

Cách sử dụng Repair PDF

Parse damaged or non-standard PDFs in tolerant mode and rebuild a clean, standards-compliant PDF container.

Đầu vàoOne damaged, truncated, or poorly generated PDF.

Kết quảOne rebuilt, sanitized PDF file.

Quyền riêng tưChỉ được xử lý trong thẻ trình duyệt này.

About repair PDF

Parse damaged or non-standard PDFs in tolerant mode and rebuild a clean, standards-compliant PDF container. Fix PDFs with broken xref tables, malformed scanner exports, or legacy documents that trigger errors in strict corporate portals.

A file that is completely zeroed out, encrypted with an unknown password, or truncated before any page objects exist cannot be recovered.

How PDFolio helps you repair PDF

PDFolio first attempts tolerant structural parsing with pdf-lib and rebuilds every valid page into a fresh object stream table. If structural parsing fails, it falls back to PDF.js stream recovery to rescue readable pages.

If a file will not open because it requires a password you know, use Unlock PDF instead.

Before you download

Always review all pages in the repaired output to verify no content was truncated in the damaged source file.

When the result is ready, download it immediately and open it in your usual PDF viewer to make a final check. You can then use Clear task data to release temporary file references from this browser tab. PDFolio does not create an account, cloud folder, or server-side document history.

A private way to repair PDF

PDFolio handles the selected files in the active browser tab. A Web Worker on your device performs the PDF task so the interface can remain responsive; document bytes are not sent to a PDF processing server, upload queue, account database, or advertising platform.

Các bước

Add the PDF file that fails to open properly in strict viewers.
Click Process to run structural recovery and visual fallback reconstruction.
Download the repaired PDF and inspect its pages.

Nên biết: If the object tree is too corrupted for vector cloning, PDFolio automatically attempts page-by-page visual rescue via PDF.js.

Câu hỏi thường gặp

How can a browser repair a corrupted PDF without uploading it?

PDFolio runs two distinct PDF parsers in WebAssembly/JavaScript that rebuild broken cross-reference tables and page trees directly in memory.

Can Repair PDF fix a password-protected file?

No. Encrypted files must be unlocked with their password in Unlock PDF first.

Does repair PDF change my original file?

No. PDFolio creates a new file for download. Your source file remains unchanged on your device.