Compress PDF
Re-save your PDF to remove redundant data and reduce file size. Works entirely in your browser — no uploads needed.
How to Use
- Choose a compression level (Medium is recommended for most files).
- Drop or select your PDF.
- Download the compressed file.
Low — re-saves with object streams.
Medium — Low + strips document metadata (title, author, keywords, producer).
High — Medium + removes annotations, bookmarks, and named destinations.
FAQ
Why is the size reduction small?
This tool removes PDF structural overhead — redundant objects, metadata, cross-reference streams. It does not re-encode embedded images, which are usually the largest part of a PDF. For larger reductions on image-heavy files, re-encoding is required and must be done server-side.
Is my PDF uploaded?
No. Everything runs locally in your browser using pdf-lib.
Will High compression break my PDF?
Removing annotations and bookmarks is safe for most documents. If your PDF relies on interactive forms or bookmarks for navigation, use Medium instead.