How to Merge PDF files
Frequently asked questions
What does Merge PDF do?
It brings multiple PDF documents and supported images together into one PDF file in the order you choose.
How do I merge PDF files?
Select your files, check their previews, arrange them in the required order, and choose merge. The processing service then creates the merged PDF.
Can I merge several PDF files at once?
Yes. Multiple PDF files can be included in one job, subject to the current file and processing limits.
Can I merge PDFs and images together?
Yes. Supported PDF, JPG, JPEG and PNG files can be mixed in the same job.
Can I put an image between two PDF files?
Yes. Arrange the image anywhere in the file list. The output follows that selected order.
Can I see what is inside an uploaded PDF?
Yes. The browser renders the first page of each uploaded PDF as a visual preview. The PDF itself is not changed by this preview step.
Can I see my JPG or PNG before combining?
Yes. Supported images are shown directly in their file cards before processing.
Can I change the order of my files?
Yes. Drag the cards to arrange them. On smaller screens you can also use the left and right arrow controls.
Can I remove a file after selecting it?
Yes. Use the remove control on the file card to take that file out before processing.
Which file formats are supported?
The current tool accepts PDF, JPG, JPEG and PNG files.
How many files can I upload?
The current interface accepts up to 30 files in one job, subject to applicable processing limits.
What is the maximum file size?
The current interface allows up to 25 MB per file and 100 MB for the merged upload.
Can I merge scanned documents?
Yes. Scanned documents can be included when they are supplied as supported PDF or image files.
Can I merge portrait and landscape files?
Yes. Files with different page orientations can be included in the same merged document.
Can I merge JPG and PNG images with PDFs?
Yes. Both image formats can be placed before, between or after PDF documents.
Can I merge password-protected PDFs?
Protected or encrypted PDFs may not be processable. Docelora does not bypass passwords or access restrictions.
What page size is the merged PDF?
Each source page is prepared as an A4 portrait PDF page before combining, so the final document uses one consistent A4 page size for printing.
Will different PDF page sizes be fitted to A4?
Each PDF page and image is placed proportionally on an A4 portrait page without stretching the content before the merged PDF is created.
Does combining change my original files?
No. The original files selected in your browser are used as inputs; the service creates a separate merged PDF.
How long does combining take?
Processing time depends on the number, size and complexity of the files. The tool shows the current processing state while the job is running.
When can I download the merged PDF?
The download control becomes available after the processing service has successfully created the final PDF.
What happens if my files cannot be merged?
The tool reports a processing error instead of presenting an unsuccessful or incomplete result as a finished PDF. You can correct the issue and try again.
Can I use merge PDF on a mobile phone?
Yes. The interface is designed for modern mobile and desktop browsers, including touch devices.