About PDF Compressor
PDF files are everywhere — contracts, reports, portfolios, research papers — but they can balloon to enormous sizes that slow down email delivery, clog storage, and fail upload limits. Our free online PDF Compressor solves this in seconds. Using advanced lossless and lossy compression algorithms, it strips redundant metadata, downsizes embedded images, and removes invisible objects to shrink your file dramatically while keeping the text crisp and readable. No software installation needed — it runs entirely in your browser.
Whether you're a student submitting coursework through a 5 MB portal, a freelancer sending a portfolio over email, or a developer batch-processing documents in a workflow, this tool handles it all. The compressor supports all standard PDF versions and preserves fonts, bookmarks, and hyperlinks so recipients get a fully functional document — just smaller.
Privacy is built in. Your PDF is processed locally; files are never uploaded to any server. This makes our PDF Compressor safe even for sensitive documents like contracts, medical records, or financial statements. Compare this to cloud services that upload your file to third-party servers — with us, your data stays on your device.
Typical compression results: a 10 MB scanned document compresses to under 2 MB; a presentation-style PDF with high-res images can go from 25 MB to 4 MB. Text-only PDFs see modest size reductions since they're already compact, but image-heavy files benefit the most.
How to Use the PDF Compressor
Upload your PDF
Drag and drop your PDF file onto the upload area, or click to browse your device.
Choose compression level
Select between Light (minimal quality loss), Balanced (recommended), or Aggressive (maximum compression) depending on your needs.
Click Compress
The tool processes your file using smart algorithms — most files complete in under 5 seconds.
Download the result
Preview file size before and after, then download your compressed PDF with one click.
Key Features & Highlights
Common Use Cases
- Reduce PDF size for email attachments under size limits
- Compress scanned documents and forms for faster sharing
- Shrink PDF portfolios and presentations before uploading
- Optimize PDFs for faster loading on websites
- Reduce storage footprint of large document archives
Frequently Asked Questions
Light and Balanced modes use lossless techniques — you won't notice any difference. Aggressive mode slightly reduces embedded image resolution, which is usually imperceptible on-screen but can affect high-resolution print.
The tool requires an unlocked PDF to compress it. Remove the password first using a PDF unlock tool, then compress.
Text data in PDFs is already encoded efficiently. The biggest gains come from embedded images. Text-only documents may only shrink by 5–20%.
Yes — you can add multiple PDF files and they'll each be compressed individually, ready to download separately.
Yes, 100% free with no hidden fees, subscriptions, or account requirements.
Everything runs client-side directly inside your web browser. No files, texts, or parameters are sent to our servers.
Yes, our tools are fully responsive and work seamlessly on iPhones, iPads, Android smartphones, and tablets.