Compress PDF
Reduce file size while retaining quality
Drop your PDF here or click to browse
Supports PDF files up to 100MB
Large PDF files can be a hassle to share via email or upload to websites. ConvertedPDF's free PDF compressor reduces file sizes by up to 90% while preserving visual quality—perfect for sharing, uploading, or archiving.
Our intelligent compression analyzes your document's content and applies optimal settings automatically. Images are compressed efficiently, while text remains crisp and readable. Best of all, everything happens in your browser—your files never touch our servers.
Why Use Our Compress PDF Online for Free?
Who Uses This Tool?
Trusted by professionals across industries for their daily document needs
Email Attachments
Compress PDFs to fit within email attachment limits (typically 25MB). Send large reports, presentations, and documents without bounced emails.
Website Uploads
Reduce PDF sizes for faster website loading. Optimize documents for online portfolios, job applications, and form submissions.
Cloud Storage
Save storage space by compressing archived documents. Fit more files in limited cloud storage. Speed up sync times across devices.
Mobile Sharing
Create smaller files for faster mobile downloads. Share via messaging apps without size restrictions. Reduce data usage when sharing.
Print Shops
Compress proofs for client review while maintaining print quality. Reduce upload times for large print files. Archive completed projects efficiently.
Legal & Compliance
Compress court filings to meet size limits. Reduce document sizes for e-filing systems. Archive case files more efficiently.
How It Works
Get started in three simple steps
Upload Your PDF
Drag and drop your PDF or click to browse. See the original file size displayed.
Choose Compression Level
Select Low (best quality), Medium (balanced), or High (smallest size) compression.
Compress & Download
Click Compress and download your smaller PDF. See exactly how much space you saved.
Powerful Features
Everything you need, nothing you don't
Smart Compression
Automatically analyzes content to apply optimal compression for each element.
Quality Presets
Choose from three levels to balance file size and visual quality.
Lossless Text
Text remains sharp and searchable regardless of compression level.
Image Optimization
Intelligent image compression maintains clarity while reducing size.
Size Preview
See estimated output size before compressing to choose the right level.
Batch Processing
Compress multiple PDFs at once with consistent settings.
Frequently Asked Questions
Quick answers to common questions
How much can I reduce my PDF size?
Typical reduction is 50-90% depending on content. Image-heavy PDFs see the biggest reductions, while text-only documents compress less but are already small.
Will compression affect print quality?
Our "Low" compression setting maintains print-ready quality. For screen viewing and email, "Medium" or "High" settings are usually sufficient.
Is the compression lossy or lossless?
Text compression is lossless. Image compression is optimized lossy, similar to how JPEGs work. You can choose how aggressive the compression is.
Can I compress a PDF multiple times?
Yes, but diminishing returns apply. A PDF compressed once at "High" won't get much smaller with repeated compression.
Will links and bookmarks be preserved?
Yes, all interactive elements including hyperlinks, bookmarks, and form fields remain intact after compression.
What's the maximum file size I can compress?
Free users can compress files up to 10MB. Premium users can process files up to 100MB.
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