Compress PDF Locally
Safe optimization reduces metadata overhead. Image-heavy mode re-renders pages which may change quality. Results vary by document.
Beta
Select a PDF file to compress
Click or drag and drop a PDF file here
How to compress a PDF
- 1
Select your PDF
Choose the PDF file you want to compress — it stays in your browser.
- 2
Compress
Click "Compress PDF" and the tool optimizes internal structures to reduce file size.
- 3
Compare & download
See the size difference and download the compressed PDF — all done locally.
Frequently asked questions
How much can a PDF be compressed?
Results vary by content. PDFs with large images often see significant size reduction, while already well-compressed files may show little change. This tool is in beta — results will improve over time.
Will compression reduce quality?
Safe compression may produce only small savings. Image-heavy mode re-renders pages at lower quality which always changes the visual output.
Related PDF Tools
When to Use Compress PDF
Reducing file size for email attachments
Shrink large PDFs to fit within email attachment size limits without splitting into multiple files.
Optimizing scanned documents
Compress high-resolution scans and photos embedded in PDFs to make them faster to share and store.
Saving storage space
Batch-compress PDF archives to free up disk space while keeping documents accessible and readable.
Limitations
- Safe compression may produce little to no size reduction for already-optimized PDFs. Image-heavy mode re-renders pages which always changes visual output and loses text selectability, form fields, and vector graphics.