Compress PDF Online Free – Reduce PDF File Size
2 usesDrop PDF files here or click to browse
Select a PDF file to compress
Before
After
Saved
PDF Compression Tips
Smart Optimization
Removes metadata, optimizes object streams, and restructures the PDF for smaller file size.
Fully Private
Your PDF never leaves your browser. All compression is done locally on your device.
Quality Preserved
Page content, text, and images remain intact. Only unnecessary metadata is removed.
Instant Results
See before/after file sizes immediately with no waiting for server processing.
Frequently Asked Questions
How much can the file size be reduced?
Results vary depending on the PDF. Files with lots of metadata or inefficient structure can see 10-50% reduction. Already optimized PDFs may see smaller gains.
Does compression affect PDF quality?
No. The tool removes metadata and optimizes internal structure without altering visible content like text and images.
Is my PDF uploaded anywhere?
No. All processing happens in your browser using JavaScript. Your file stays on your device.
How do I compress a large PDF to send it via email?
Our free online PDF compressor is perfect for reducing large PDF files to meet email attachment limits. Simply drag and drop your oversized PDF onto the tool. It intelligently removes unnecessary metadata and optimizes the file's internal structure, often achieving significant size reduction without compromising quality. Since processing happens entirely in your browser, your document remains private and never leaves your device.
How to Compress a PDF
- Click the upload area or drag a PDF file into it.
- Click Compress PDF to start optimization.
- Review the before/after size comparison.
- Click Download PDF to save the compressed file.
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All files are processed locally in your browser. Nothing is uploaded to any server.