Compress PDF – Reduce PDF File Size Online Free
Optimize and reduce your PDF file size instantly. Removes metadata and compresses document structure — no uploads, 100% private.
Upload PDF to Compress
Drag & drop or browse files
Supports PDF up to 100MB
Max file size: 100 MB
How to Use
Upload Your PDF
Click or drag to upload your PDF file (up to 100MB).
Compress
Click 'Compress PDF' and wait a moment while we optimize your file.
Download
Download your smaller, optimized PDF with one click.
Why Use Our Tool?
100% Private
All processing happens in your browser. Your file never leaves your device.
No Quality Loss
Visual content remains identical — only unnecessary overhead is removed.
No Registration
Free to use with no account or sign-up required.
Fast Processing
Most PDFs compress in just a few seconds.
Frequently Asked Questions
How much can I reduce my PDF size?
The reduction depends on the PDF content. PDFs with heavy metadata, redundant objects, or unoptimized structure typically see the best results.
Will compression affect my PDF quality?
No. Our compressor optimizes the document structure and removes metadata without altering the visual content of your PDF.
Is my PDF data kept private?
Yes. Compression runs entirely in your browser using pdf-lib. Your file is never uploaded to any server.
What is the maximum PDF size I can compress?
You can compress PDFs up to 100MB. Very large files may take a moment to process.