Looking to send an email attachment or upload a document that exceeds an upload limit? This page compresses and optimizes your PDF directly in the browser.
How to compress a PDF
- Upload your PDF file (up to 80 MB).
- Press Convert file.
- Download the compressed PDF.
What you get
A leaner, standard .pdf document with redundant resources removed and internal streams optimized.
When this helps
- Meeting strict file upload size limits for government portals, job applications, or university submissions
- Preparing PDFs for faster web downloads and email delivery
- Cleaning up bloated PDF exports from desktop design applications
Related PDF tools
After compressing, you may want to reorganize pages, prepare a PDF for fast web viewing, or make a scan searchable:
- Organize and reorder PDF pages — keep, reorder, or drop pages
- Make a PDF open faster — linearize for fast web view
- Make a scanned PDF searchable — add an invisible OCR text layer
- Merge PDF files — combine multiple documents
Browse all PDF tools.
Operation details
What happens: pdfcpu rewrites the PDF object graph, deduplicating fonts and images, compressing streams, and pruning redundant cross-reference tables.
Engine: pdfcpu 0.15.0 optimize.
Inputs: One PDF up to 80 MB. No options — optimization profile is fixed.
Output: A smaller .pdf with the same pages, text, and vector content. Visually identical in most cases.
Lossy? Structure-preserving optimization; embedded images may be recompressed depending on source.
Common failures: Encrypted PDFs without password, corrupt files, or oversize uploads.
Use when: A PDF export is bloated from design tools or repeated save cycles and you need to meet an upload cap.