無料ツール
所有するPDFのパスワードを削除 — パスワードを一度入力してロック解除コピーを即座にダウンロード。
使い方
3ステップでPDFをロック解除する
- 1
Upload your password-protected PDF
Drag and drop your PDF onto the tool or click to browse. The file loads in your browser — never sent to any server.
- 2
Enter the current password
Type the document's current password. The mupdf WASM module verifies it locally and decrypts the document.
- 3
Download the unlocked PDF
Click 'Download unlocked PDF'. The decrypted file downloads immediately — no password required to open it.
Signvoyを選ぶ理由
速く、安全で、プライベート
Requires the correct password
The tool verifies the password using mupdf WASM before decrypting — it cannot bypass encryption without the right password.
Instant unlocked download
Decryption runs locally using WebAssembly and the unlocked PDF downloads in seconds — no queue, no server round-trip.
Your file and password stay local
Everything runs in your browser. Your PDF and your password are never sent anywhere — close the tab and both are gone.
よくある質問
よくある質問
- Can this tool unlock any PDF without a password?
- No — the tool requires the correct current password. It cannot bypass encryption. Only use this on PDFs you own and have the password for.
- Is it legal to remove the password from a PDF?
- Yes, if you are the owner of the document or have been given the password by the owner. Removing password protection from documents you do not have rights to may be illegal.
- My password is correct but it's still failing — why?
- Some PDFs use XFA or non-standard encryption that mupdf may not support. If the tool fails consistently with the correct password, the PDF may use an unsupported encryption method.
- Will the unlocked PDF retain all content?
- Yes — decryption removes only the encryption layer. All text, images, and formatting are preserved exactly as in the original.
もっと詳しく知りたいですか？ 完全ガイドを読む: PDFからパスワードを削除する方法 →
署名の催促をやめよう
Signvoyを使って取引を成立させ、クライアントをオンボーディングし、契約書に署名している数千のチームに参加しましょう — より速く。
クレジットカード不要 · 永久無料プラン · 14日間プロトライアル