Compress PDF
Compress large PDFs to create files that are easier to attach to emails or submit online. Compare each file's size before and after compression, check the results, and save either the compressed version or the original PDF.
What you can do
Compare file sizes before and after compression
Check each file's original and compressed sizes and choose which PDF to save.
Process multiple PDFs together
Add multiple documents together and compress each PDF. Their pages are not merged.
How to use
Add PDF
Select the PDFs to compress. You can also add multiple documents together.
Compress PDF
Press “Compress PDF”. While processing, you can wait for completion or cancel.
Compare file sizes and save
Check the before and after sizes, then download. If the size did not decrease, you can choose the original PDF.
When to use it
Attach documents to email
Reduce a document's size before sending and check whether it fits the attachment size limit.
Use for web submissions
Check the compressed file size and content before submitting an application form or report.
Reduce the size of stored documents
Compress multiple PDFs and save only the files for which compression was effective.
Before compressing
Compression may not make the file smaller
Some PDFs, such as those already optimized, may not become smaller. Compare the resulting sizes and use the original PDF if needed.
Check the content before submitting
After compression, open the pages and check the text and images. Before using the file, check the recipient's required format and size limit as well as the file size.
Frequently asked questions
What if compression does not reduce the file size?
The results show the original and processed file sizes. If a PDF did not become smaller, you can download the original PDF.
Where can I check the compressed file size?
When processing finishes, each file's results show “Before compression”, “After compression”, and the difference.
Can multiple PDFs be combined into one?
This page compresses each PDF separately. To combine them into one file, use PDF merger.
File handling
- Original PDF
- Kept without overwriting
- After compression
- Compare with the original size and download