How to merge invoices and receipts into one PDF
At the end of the month, invoices and receipts arrive as a mix of PDFs, scans and phone photos. Your accountant, your expense system or your client usually wants one file in a sensible order. Merging them saves time for everyone and makes the batch easier to check.
PixnPDF's Invoice and Expense workflow merges your files, compresses the result and makes scanned text searchable, all inside your browser. Financial documents stay on your device.
Turn photos into PDF pages first
If some receipts are phone photos, convert them with Image to PDF so every item is a PDF page. Crop away the table or background if needed, and keep each receipt on its own page so totals are easy to find.
Merge in date order
Add all files to Merge PDF and drag them into date or invoice-number order. You can merge up to 30 files in one job for free, and up to 100 with Premium. Merge PDF can also rotate pages, insert blank separator pages and drop pages you do not need.
Adding page numbers afterwards makes it easy to refer to a specific receipt in an email or an audit query.
Make it small and searchable
Scanned receipts make large files. Compress PDF reduces the size for email, and OCR PDF adds an invisible text layer so you can search for a supplier name or amount. The Invoice and Expense workflow on the homepage runs Merge, Compress and OCR in order, with a check after every step.
If you need the numbers in a spreadsheet instead, use PDF to Excel on the merged file and review every amount.
Name and organise the final file
Give the merged PDF a clear name, such as the company, month and year, so it is easy to find later. If you send invoices to several clients or cost centres, create one merged file for each rather than one huge file for everything. That keeps each file small and makes it easier for the recipient to approve.
When the same monthly routine repeats, use the Invoice and Expense workflow each time so the steps are always done in the same order. With Premium you can save your own version of the workflow, for example adding page numbers at the end, and run it again in a few clicks.
Accountants who prepare bundles for several clients can also add a short cover page made in a word processor and merge it in first, listing the period and the number of invoices included.
Keep originals
Merging creates a new file and leaves your originals untouched. Keep the original invoices for your records, because some tax authorities and auditors require them in their original form.
How it works
- Convert photo receipts with Image to PDF.
- Merge all invoices in the right order with Merge PDF.
- Compress the merged file and run OCR to make it searchable.
- Add page numbers and download the final PDF.
Before you export OCR and spreadsheet conversion can misread blurred numbers. Always check totals against the original invoices.
Merge PDF · Image to PDF · Compress PDF · OCR PDF · Page numbers
Common questions
How many invoices can I merge at once?
Up to 30 files per job on the free plan and up to 100 with Premium. You can run as many jobs as you like.
Are my financial documents uploaded?
No. Merge, compress and OCR run in your browser, so the files stay on your device.
Can I search the merged PDF?
Yes, after running OCR PDF the scanned text becomes searchable and selectable.
Can I change the order after merging?
Yes. Open the merged file in Organize PDF to move, rotate or delete pages, or simply merge again with the files in a different order. Your original invoices stay unchanged either way, so nothing is lost if you start over.
Can I merge invoices on my phone?
Yes. PixnPDF works in mobile browsers on iPhone and Android. Choose the files from your downloads or Files app, arrange them and merge them, just like on a computer.