Protect PDF
Encrypt PDFs with government-grade AES-256. Your password and document never leave your browser — fully private encryption.
How to password-protect a PDF
Three clicks from an unprotected document to AES-256 encryption — all in your browser.
- 1
Drop your PDF
Drag and drop a PDF into the dropzone. The file is read locally — no upload to a server, no temporary cloud storage.
- 2
Set a strong password
Type a password (12+ characters with mixed case, numbers, and symbols recommended). Confirm it. Your password is used only in your browser.
- 3
Encrypt and download
Hit Protect. The PDF is encrypted with AES-256 locally and downloads instantly. The original unprotected file on disk is untouched.
Why protect with Editryk
Truly private encryption. Your password is used locally and never transmitted.
AES-256 encryption
Government-grade encryption — the same standard used by banks and intelligence agencies.
Password stays local
Your password is used in-memory only. Nothing transmitted, logged, or stored. There is no Editryk-side recovery.
Universally compatible
Encrypted PDFs open in Acrobat, Preview, browsers, and every modern mobile reader.
Quality preserved
Encryption is a wrapper — pages, fonts, hyperlinks, and form fields stay intact.
In-browser encryption
The same engine that powers Editryk's unlocking and merging — running entirely in your browser.
Free forever
No signup, no daily quota, no watermark on output, no premium tier.
Who uses an online PDF protector?
Lawyers and legal teams encrypt sensitive client communications, settlement drafts, and discovery before sending over email or cloud storage.
Accountants and finance teams lock down tax returns, financial statements, and audit documents before sharing with clients.
Healthcare providers protect patient records and lab results in transit between clinics, labs, and insurance carriers.
HR teams encrypt offer letters, separation agreements, and performance reviews before email distribution.
IT and security teams wrap policy documents and internal credentials with a passphrase before posting to shared drives.
Anyone sending tax documents encrypt scanned IDs, W-2s, and 1099s before emailing to an accountant or financial advisor.
Frequently asked questions
Everything worth knowing before you encrypt your first PDF.
How strong is the encryption?
Editryk uses AES-256 — the same encryption standard adopted by the US government for top-secret documents and used by every modern banking system. With a strong password, an AES-256 PDF is computationally infeasible to crack.
Are my password and PDF uploaded to a server?
No. Both stay entirely in your browser. Editryk encrypts locally — nothing sent over the network, nothing logged, nothing stored. The password exists only in your browser's memory during the encryption.
What makes a good PDF password?
12+ characters with a mix of upper/lower case, numbers, and symbols. Avoid dictionary words, names, dates, and patterns. A passphrase like "Coffee-Mountain-Tax-Form-2026!" is much stronger than "P@ssw0rd123". Use a password manager to generate and store one.
Can the password be removed later?
Yes — anyone with the correct password can remove it using the Unlock PDF tool. Without the password, removal is computationally infeasible. Store the password somewhere you'll find it later (a password manager works best).
What if I forget the password?
Editryk cannot recover it. AES-256 is designed to be unrecoverable without the key. Brute-force attacks on a 12-character random password would take longer than the age of the universe on current hardware. Use a password manager.
Will the protected PDF open everywhere?
Yes. AES-256 encrypted PDFs open in every modern PDF reader — Adobe Acrobat, macOS Preview, browser viewers, mobile apps. Each will prompt for the password before showing the content.
Does encryption hide the document from search engines and metadata snoopers?
Yes. The contents — text, images, form fields — are unreadable without the password. Some PDF metadata (file size, creation date) may still be visible, but the body of the document is fully encrypted.
Can I encrypt a PDF that already has a password?
Unlock it first using the Unlock PDF tool (you must know the existing password), then re-protect it with a new password.
Will quality and content survive encryption?
Yes. Encryption is a wrapper around the file — pages, text, fonts, hyperlinks, form fields, and bookmarks are all preserved. Only access changes, not content.
Keep going with related tools
Pair this tool with the rest of Editryk's privacy-first toolkit.
Ready to encrypt your PDF?
No signup, no upload, no watermark. Pick a strong password — AES-256 encryption happens locally in your browser.
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