Compress PDF Online - Reduce PDF File Size for Free
100% Client-Side PrivacyCompress PDF files online for free. Reduce PDF size to 100kb, 200kb, or 500kb while maintaining crisp text and quality. 100% private in-browser compression.
Quick Features
- 3 smart presets: Low, Recommended (Default), and High Compression
- Real-time file size comparison with savings percentage calculation
- Removes redundant stream objects, unreferenced fonts, and metadata
- Optimizes embedded raster photos with high-DPI downsampling
- 100% client-side compression — maximum confidentiality
- No file count limits, no email registration, completely free
How to use Compress PDF Online - Reduce PDF File Size for Free
Upload Your PDF
Drag and drop your PDF into the tool or browse your files. The original file size and page count will be displayed.
Select Compression Level
Choose Low (maximum quality), Recommended (balanced size and clarity), or High (maximum size reduction).
Download Compressed PDF
Click Compress PDF. Review the before-and-after size comparison and download your optimized document.
Why choose this tool
- Completely free — no signup or hidden limits
- Runs 100% in your browser — your data stays private
- Instant results, no downloads or installs
- Works on any device with a modern browser
Common Use Cases
- Shrink PDF files to meet strict email attachment size limits (e.g. under 10MB)
- Compress government, visa, job, and college portal document uploads
- Speed up web page loading for downloadable PDF whitepapers and guides
- Free up cloud storage space by archiving optimized PDFs
Technical Details
Frequently Asked Questions
How much can I reduce my PDF file size?
Reduction varies by document type. PDFs with scanned photos and high-resolution images can often be reduced by 40% to 80%. Documents that are primarily text and vectors typically see 15% to 35% reduction through stream and metadata optimization.
Will compressing my PDF blur the text?
No. Text is rendered using vector outlines and fonts which remain pin-sharp at any zoom level. Raster photos are optimized to maintain readability.
Which compression preset should I select?
We recommend the Recommended preset for almost all documents. It delivers a great file size reduction while maintaining professional visual fidelity.
Is it safe to compress private bank statements and tax filings?
Yes! Because the compression runs 100% inside your browser, your documents are never transmitted across the network or saved on our servers.
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