Check what the recipient requires
Check which documents to include and the maximum accepted size. Follow the recipient’s instructions: an attachment limit may differ from the limit for the whole message. Leave some room because email encoding can increase its size.
Use the limit specified by the recipient. The initial 5 MB value is only an example.
Enter a limit above zero and no greater than 1,000 MB.
How to merge PDFs in the right order
Start with the request, follow with the required documents and finish with supporting attachments. Check for duplicates before merging.
- Request.pdf · 1.1 MB
- Document.pdf · 2.1 MB
- Attachments.pdf · 5.2 MB
Up to 20 PDFs and 500 MB in total. Server results expire within 30 minutes; requests within 2 hours. Data and privacy.
This link opens the actual tool. It does not transfer documents or settings from this example.
How to reduce PDF file size
Start with light compression, which keeps images unchanged. If needed, try medium or strong: images may lose detail. Check small text, photos and scans carefully. Savings depend on the document and are not guaranteed.
The sample document contains text and images. Its initial size is 8.4 MB.
The combined source file size may differ from the merged PDF size. Compression does not guarantee reaching the limit.
Each attempt starts from the merged PDF or selected original, avoiding repeated compression of the same result.
The final sizes shown are simulated. After merging and compression, measure your PDF’s actual size from the real result.
Compress and check your PDFOpen the result before sending it
A smaller file only helps if the recipient can read it. Open the final PDF and run through these checks.
Should I add a password?
Use one when needed and agree how to share it with the recipient. Do not automatically password-protect every attachment: it may make opening or processing it harder.
Is the PDF digitally signed?
Check the recipient’s instructions before editing. Always keep the original: changes can affect the validity of a digital signature.
Does compression not reduce the size enough?
Check for unnecessary pages or already optimized images. If the result is hard to read, ask the recipient for another delivery method.
How do I merge two PDFs into one attachment?
Select both documents, check their order using the arrows and start merging. The first document in the list comes first. Open the result to check the page order within each source file too.
How do I reduce a PDF to 1 MB or another limit?
Set the required limit in the first step and compare it with the measured result size. Try light compression, then a stronger setting if needed. Some PDFs cannot reach 1 MB with acceptable quality. If text becomes hard to read, agree another delivery method.