Question 1

How does browser-side PDF compression work?

Accepted Answer

The tool reloads your PDF and re-saves it using Flate (DEFLATE) compression applied to all indirect objects inside the file. Many PDFs exported from design tools, email clients, or older software include uncompressed or poorly packed object streams. This pass removes that overhead without touching the actual content.

Question 2

How much will the PDF file size be reduced?

Accepted Answer

It depends on the source PDF. Files exported from Notion, Google Docs, older Word versions, or email attachments often contain large amounts of uncompressed metadata and can shrink noticeably. PDFs already optimized by print workflows or modern exporters may see little or no reduction. The before and after sizes are shown so you always know exactly what you got.

Question 3

Does PDF compression affect text, fonts, or images?

Accepted Answer

No. This tool only repacks the PDF structure using lossless compression. Text remains fully selectable and searchable, fonts are unchanged, and images are not re-encoded or downsampled. The output is byte-for-byte equivalent in content to the original.

Compress PDF Size Online

How does browser-side PDF compression work?

How much will the file size be reduced?

Does compression affect text, fonts, or images?

Is my PDF uploaded anywhere?

Does it work with password-protected PDFs?

Is there a file size limit?