ファイルツール
パスワードでPDFのロック解除
現在のパスワードを知っているPDFの暗号化をブラウザで解除します。
Your files are processed locally in your browser and never uploaded.
Your files are processed locally in your browser and never uploaded.
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使い方
- Choose a password-protected PDF.
- Enter the current opening password; retries are manual and never automated.
- Unlock and download a PDF that opens without a password after validation.
おすすめの用途
- Removing a password before an approved workflow
- Preparing an authorized archive
- Editing a document in a compatible PDF editor
Private, local PDF processing
BrightTools reads the selected PDF in your browser and never uploads it. File contents, names and passwords are not sent to analytics. A shared 50 MB and 200-page safety limit keeps memory use predictable on phones and desktops.
Quality and validation
Compression renders each page at a bounded resolution, encodes it as JPEG and checks the real output bytes. Target-size pages use a finite coarse-to-fine search; they never delete pages or create blank or damaged PDFs. The result is reparsed to confirm page count and page dimensions before download.
Related PDF tools
Need to prepare a document first? Merge PDFs, split pages, organize pages, convert an image to PDF or export a PDF to images.
注意点
Only known passwords are accepted. This tool does not crack passwords, run dictionaries or bypass access controls. Reader permissions may still apply after decryption.
よくある質問
Can you recover a forgotten password?
No. Only a password you provide is tried, and every retry is manual.
What if the PDF has no password?
The tool detects that state and offers the original file directly.
Are unlocked PDFs uploaded?
No. Decryption and output validation run locally in your browser.