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Every quarter it’s the same story: your accountant asks for your purchase and sales invoices, and they’re scattered across your inbox, your downloads and a pile of paper receipts. One tidy PDF per period makes life easier for both of you, and with a password on it, it travels more securely.
How to combine your invoices
- Gather everything in one folder. Give the files names that start with the date (for example 2026-07-03-supplier.pdf), so you can see straight away in the list whether the order is right; if not, fix it with the arrows.
- Paper receipts? Take a photo and convert it with JPG to PDF.
- Open Merge PDF, choose all the files, check the order and click Merge.
- Too big to email? Make the file smaller with Compress PDF.
- Protect the PDF with Protect PDF and choose a strong password. The file is encrypted with AES-256.
- Send the password separately, for example by text message or over the phone, and never in the same email as the attachment.
Always protect the file as the last step. If you change it afterwards, the result no longer has a password. Also make separate bundles for purchase and sales invoices, or ask your accountant how they prefer to receive them.
Why not upload your invoices?
Invoices are full of personal data: names, addresses, VAT numbers, bank account numbers and sometimes exactly what someone bought. If you upload them to an online PDF service, you hand that data to an extra party. Under the GDPR you then need to be able to check what that party does with it, where it’s stored and for how long.
PDFCommunity works differently: merging, compressing and protecting happen entirely in your own browser. Your invoices aren't uploaded, so no extra party is involved. Read more in GDPR-friendly PDF tools.
Some accounting software can’t import a password-protected PDF automatically. So ask your accountant first whether a protected PDF works for them, or agree together on a secure way to share files.
Frequently asked questions
Is a password on a PDF secure enough?
With a strong password, yes: AES-256 is the strongest encryption in the PDF standard. The weak spot is usually the password itself. Choose a long phrase or a random string of at least 12 characters, and never send it in the same email.
My accountant can’t open the PDF. What now?
Check that the password is exactly right, including capital letters. If your accountant’s software doesn’t work with protected PDFs, they can remove the password with Unlock PDF, or you can send an unprotected version through a channel you both trust.
Don’t invoices have to be sent as e-invoices?
In some countries, invoices between businesses must be structured e-invoices, for example sent over the Peppol network, so check the rules where you are based. A PDF bundle doesn’t replace those, but it’s still handy for receipts, invoices from foreign suppliers or as a readable copy for your accountant.
Can PDFCommunity see my invoices?
No. There’s no upload, so there’s nothing to see. All processing happens in your own browser, on your own device.