Optimize PDF for the Web
Prepare a PDF for progressive web viewing. Linearization reorganizes document structures so readers can begin displaying pages before the full file arrives.
LOCAL PDF LINEARIZATION
Prepare a PDF for fast web viewing
Runs locally in your browser. Your PDF is never uploaded.
A QUICK WALKTHROUGH
How to use this tool
- Choose one unencrypted PDF up to 20 MB and 100 pages.
- Linearize it locally in a browser worker and verify the result with PDF.js.
- Review the actual size change and download the new file. Keep the original.
Fast web view, not compression
QPDF writes a linearization dictionary and reorganizes the PDF for progressive access. This is different from lossy image reduction or a general file-size compressor. Linearization metadata can make a small PDF larger.
Local and independently checked
One PDF up to 20 MB and 100 pages is processed in a browser worker. PDF.js independently opens the output and checks its page count. The file is not uploaded.
Keep the original
The output is rewritten. Digital signatures may no longer validate and advanced features may be affected. Password-protected PDFs are not supported. Review the file in your target reader and delivery setup.
GOOD TO KNOW
Common questions
Will the optimized PDF always be smaller?
No. This tool linearizes for progressive web viewing; it is not a size-reduction promise. Small or already optimized files may grow.
Does linearization guarantee faster loading?
No. It prepares a PDF for readers and servers that support byte-range progressive access. Network, server, cache, and viewer behavior also matter.
Is my PDF uploaded?
No. QPDF WebAssembly runs in a local browser worker. The selected PDF is not sent to a server.
Are passwords and signatures supported?
Password-protected input is refused. Rewriting may invalidate existing digital signatures; keep the original and verify the new file.