PDF Online mở khóa

Remove the open password from a PDF you can already access. Convertr verifies your password with qpdf and saves an unencrypted copy without reducing quality.

Known password required No cracking Không hình mờ Lên tới 1GB
PDF

Password-known decryption

Save an editable unencrypted copy

Only enter a password for PDFs you own or are authorized to modify. Convertr does not store or log the password.

Cách mở khóa PDF trực tuyến

  1. 1

    Upload the PDF you own or are authorized to modify.

  2. 2

    Enter the open password you already use to view the PDF.

  3. 3

    Convertr verifies the password with qpdf and writes an unencrypted copy.

  4. 4

    Download the unlocked PDF for editing, printing, merging, OCR, or conversion.

Các công cụ PDF và tài liệu liên quan

Use the unlocked copy with other Convertr PDF tools for editing, cleanup, OCR, merging, or conversion.

Ký PDF

Fill and self-sign a PDF after unlocking it. Everything runs in your browser.

Cây PDF

Trim PDF margins, scanner borders, or unwanted page edges.

Xóa siêu dữ liệu PDF

Strip common document metadata before sharing a PDF.

Tính PDF

Finalize fields, annotations, signatures, markups, and layers after unlocking.

Tách PDF

Extract pages or split every page into separate files.

Hợp Nhất PDF

Combine multiple PDF files into one document.

Trình nén PDF

Shrink PDF files with quality-preserving presets.

PDF OCR

Extract searchable text from scanned PDFs and images.

PDF sang Word

Convert PDF files to editable document formats.

PDF sang JPG

Convert PDF pages into JPG images.

Trình chuyển đổi tài liệu

Chuyển đổi PDF, DOCX, EPUB và các định dạng tài liệu khác.

Câu hỏi thường gặp

Can Convertr unlock a PDF without the password?

No. This tool is only for authorized decryption when you already know the PDF open password. It does not crack passwords, guess passwords, bypass unknown passwords, or defeat access controls.

Does unlocking change PDF quality?

No. qpdf removes encryption and rewrites the PDF structure without rasterizing pages, compressing images, changing dimensions, or reducing resolution.

What if my PDF is not encrypted?

Convertr can return a clean rewritten copy and will clearly report that no password was present.

What if the password is wrong?

The unlock fails with a clear message. Convertr does not retry with guesses, dictionaries, brute force, or cracking libraries.

Các tệp PDF tải lên có được giữ riêng tư không?

Files are processed in short-lived temporary storage and automatically deleted after processing. Passwords, filenames, PDF text, document contents, and metadata values are not sent to analytics.