PDF Compressor Online
Reduce PDF file size by optimising internal structure.
Drop a PDF here or click to select
Reduce file size by removing unused objects, metadata, and annotations
Original
Compressed
About PDF Compressor
Reduces PDF file size by re-saving with compressed object streams. This works best on PDFs with redundant internal structure. Note: PDFs with embedded images compress best with image-level tools.
Use Cases
Reducing PDF size for email attachments, shrinking PDFs for upload to web portals with size limits, optimising PDFs for faster web loading.
How It Works
Re-saves the PDF using pdf-lib with useObjectStreams enabled, which packs more objects into compressed streams and reduces overall file size.
FAQs
How much will it compress?
Results vary. Text-heavy PDFs may shrink 10–30%. Image-heavy PDFs see minimal reduction since images are already compressed.
Is there any quality loss?
No. This is lossless structural compression. Text and image quality are unchanged.