Does this re-compress images inside the PDF?

No — it re-packs the PDF's internal objects for a leaner file. Savings vary depending on how the original was structured.

Compress PDF

Compress PDF re-optimizes a PDF's internal object structure to reduce its file size, right in your browser.

Click to upload a fileor drag and drop

This re-packs the PDF's internal objects; it does not re-compress already-embedded images, so savings vary by file.

Combine multiple PDF files into one document.

Split a PDF into individual single-page files.

Rotate every page in a PDF.

Remove specific pages from a PDF.