FAQ
PDF compression questions answered.
These answers explain what online PDF compression can and cannot do before you upload a file.
Compression depends on the PDF
A PDF made from large scans usually compresses differently from a text-based PDF. The more images and scans the file contains, the more quality trade-off may be needed.
Choose the largest acceptable target
If a portal allows 2MB, use 2MB instead of 100KB. Choosing the largest accepted size usually keeps more visual quality.
Questions answered
Is PDF Size Reducer free?
Yes. The current tool can be used without creating an account.
What file size targets are available?
Common targets include 100KB, 200KB, 500KB, 1MB and 2MB.
Does compression always work?
No. Some PDFs cannot reach the selected target without unacceptable quality loss or may be unsupported.
Are encrypted PDFs supported?
Encrypted or password-protected PDFs may fail. Remove protection only if you have permission to do so.
Does the file download automatically?
No. The result is shown first, and you click the download button when ready.
Should I check the compressed file?
Yes. Always open the result and verify text, images and page order before submitting it.