A PDF won't open: password-protected or damaged files
If the PDF is password-protected, unlock it with Unlock PDF (you need the password) and upload the unlocked copy. If it's damaged or too complex, re-save it or print it to a new PDF from the app that made it, then upload that copy.
Updated 2 min read
Match the message you see
| Message | What it means | What to do |
|---|---|---|
| This PDF is password-protected | The file is encrypted, so PDFBetter can't read the pages. | Unlock it first, then open the unlocked copy (steps below). |
| This PDF couldn’t be opened / This file doesn't look like a valid PDF, or it is damaged. | The file is broken or isn't really a PDF (for example a renamed image or an incomplete download). | Download it again, or re-save it from the app that created it, or print it to a new PDF. |
| This PDF is too complex to open safely. | The file's internal structure is far larger than its pages need, which can freeze a browser or server. | Save or print it to a new PDF, then upload that. |
| “…” can’t be opened here. | The file type isn't supported. | Use PDF, Word, PowerPoint, Excel or an image. |
| We can’t find this document | It was deleted, belongs to another account, or was a guest draft in a different browser. | Check the trash, log in to the right account, or use the browser you started in. |
| This guest draft has expired | Guest drafts are deleted 1 hour after they're created. | Click Upload again; create a free account to keep future drafts. |
Unlock a password-protected PDF
Step 1: Open Unlock PDF
Go to Unlock PDF, or click Unlock PDF on the error screen. It runs in your browser and needs no account.
Step 2: Enter the password
Type the password you were given. PDFBetter can't remove a password you don't know; ask whoever sent the file.
Step 3: Upload the unlocked copy
Download the unlocked PDF, then upload or open that copy in the editor.
Fix a damaged PDF
- Download the file again. Email attachments and interrupted downloads are the most common cause.
- Open it in the app that created it (Word, a scanner app, your bank's portal) and save or export it as PDF again.
- If it opens anywhere else, use that app's Print → Save as PDF to write a clean copy. This also fixes most “too complex” files.
- Word, PowerPoint or Excel files that fail with The conversion produced no PDF. The file may be damaged.: open them in Office, save once, and try again.
The PDF opens in my viewer without a password. Why does PDFBetter say it's protected?
Some PDFs open freely but are still encrypted to block printing or copying. Unlock them with Unlock PDF using the permissions (owner) password; ask the sender if you don't have it.
Can I edit a protected PDF without unlocking it?
No. Encrypted files have to be unlocked before the editor can read their pages.
Tools in this article
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- Upload fails or stalls, and file size and page limitsMost failed uploads are a dropped connection: click Retry in the Uploads tray. If the message says the file is too large or has too many pages, you've hit your plan's limit: 50 MB and 500 pages per document on Free.
- Supported browsers and fixing saving or loading problemsUse a current version of Chrome, Safari, Edge or Firefox with JavaScript on. If the editor shows Offline — will retry, keep the tab open; it saves when you reconnect. Changed elsewhere means another tab edited the document: choose Reload latest or Keep my version.
- Contact support and include the details we needUse the contact form (also under Help → Contact support in the app) or email [email protected]. Include your account email, what you were doing, the exact error message, your browser and the time it happened. A person reads every message and replies within two business days.
- Password-protect or unlock a PDFUse Protect PDF: choose Require a password to open, set the Open password, pick what's allowed and click Protect PDF. Unlock PDF removes a password you know. Both run in your browser, and nobody at PDFBetter can recover a forgotten password.