Merge PDF Online — Free, Secure & 100% Offline
Combine multiple PDF files into one document, with no account and no watermark. Your files never leave your device — it all happens in the browser.
Merge PDF
Drop PDFs — and photos too. Reorder, rotate, then download one combined PDF.
Drop PDFs and images here, or click to choose
Everything is processed in your browser — files never upload
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Browse all PDF Tools →Merging loses form fields and bookmarks
When you merge multiple PDFs into one, the tool copies only the visual page content. Form fields, bookmarks, annotations, and any document-level metadata do not survive the merge — you get a clean PDF containing only what you see on screen. This is a fundamental limitation of page copying; if your PDFs contain fillable forms or navigation bookmarks you need to preserve, a merge will destroy them.
You can mix PDFs with photos
Drop any combination of PDF files and images (.png, .jpg, .webp, .gif, .bmp, .heic, .avif) into the workspace. Every PDF contributes its pages; every image becomes a single page. Exotic formats like WebP or HEIC convert to PNG at intake, so you see a unified grid of pages you can reorder, rotate, or delete before downloading one combined PDF. This saves the friction of converting images separately first.
Encrypted PDFs prompt for a password
If a PDF is password-protected, the tool asks for the password when you drop it. You get three attempts. Once you enter the correct password, the tool remembers it for that file so later exports open the file without prompting again. If you fail three times, the PDF stays locked and cannot be merged.
Corrupted PDFs are skipped with a clear message
A file that looks like a PDF but is damaged or unreadable gets a friendly error: couldn't be read as a PDF — it may be corrupted. That file is skipped; the rest of your merge continues. You see exactly which files failed so you know what to fix before trying again.
Merging is usually followed by reordering, since files rarely arrive in the sequence you want them bound. The organize PDF tool handles the rearranging.
How to use the Merge PDF
Takes about a minute. No signup, no download, your data stays in your browser.
- 1Open the tool. Scroll up to the Merge PDF above — it loads instantly in your browser, no install needed.
- 2Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
- 3Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.
Frequently asked questions
Common questions about the Merge PDF.
Do form fields and bookmarks survive a merge?
No. When you merge PDFs, only the page visuals are copied into the new file. Form fields, bookmarks, annotations, and any document metadata are lost. If you need to preserve interactive forms or navigation structure, a merge is not the right tool.
Can I merge PDFs with images?
Yes. Drop any mix of PDF files and images (PNG, JPG, WebP, GIF, BMP, HEIC, AVIF). Each PDF contributes all its pages; each image becomes one page. You can reorder, rotate, and delete pages before downloading one combined PDF.
What if a PDF is password-protected?
The tool prompts you for the password when you add the file. You get three attempts. Once you enter the correct password, the file is decrypted and merged with the others. If all three attempts fail, the PDF stays locked and cannot be included.
How large can my PDFs be?
Files over 100 MB trigger a size warning rather than a hard block. There is no stated limit on the total number of pages or the size of the merged output. Everything runs in your browser, so very large merges depend on your device's available memory.
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