PDF Compressor
Reduce PDF file size without losing quality. Works entirely in your browser - no data is uploaded to servers.
PDF Compressor
Compress PDF files by optimizing structure and removing unnecessary elements
Select PDF File
Click to browse or drag and drop your PDF file here
How to Use Our PDF Compressor
- Upload PDF - Click the upload area or drag and drop your PDF file.
- Select compression level - Choose the compression level based on your needs.
- Compress - Click "Compress PDF" to process your file.
- Download - Once compression is complete, download your optimized PDF.
Compression Levels Explained
- Low Compression - Minimal compression, best for documents requiring high fidelity and text clarity.
- Medium Compression - Balanced compression, good for most documents with a mix of text and images.
- High Compression - Maximum compression, ideal for documents where file size is more important than perfect quality.
Why Compress PDF Files?
Email Attachments
Reduce file size to meet email attachment limits.
Faster Uploads
Upload compressed files more quickly to websites and cloud storage.
Mobile Friendly
Make PDFs easier to view and share on mobile devices.
Save Storage
Reduce storage space used by PDF documents.
Understanding PDF Compression
How PDF Compression Works
PDF compression works by reducing the file size of a PDF document without significantly affecting its visual quality. This is achieved through several techniques:
- Structure Optimization - Removing redundant elements and optimizing the PDF structure
- Image Optimization - Recompressing images with more efficient algorithms
- Font Subsetting - Including only the characters actually used in the document
- Metadata Removal - Removing unnecessary metadata and comments
Types of PDF Compression
- Lossless Compression - Reduces file size without any loss of quality. Best for text documents.
- Lossy Compression - Reduces file size by discarding some data, which may affect quality. Best for image-heavy documents.
When to Use PDF Compression
- When you need to email a PDF but it exceeds attachment size limits
- When uploading PDFs to websites with file size restrictions
- When storing large numbers of PDFs to save disk space
- When sharing PDFs over slow internet connections
- When optimizing PDFs for web viewing
Best Practices for PDF Compression
- Always keep a backup of the original file before compression
- Use higher compression levels for documents with important visual details
- For text-only documents, use lower compression to maintain text clarity
- Test the compressed PDF on different devices to ensure readability
- Consider the purpose of the document when choosing compression level
Frequently Asked Questions
Yes, our PDF compression is completely safe. All processing happens in your browser - your files never leave your computer or are uploaded to any server. This ensures complete privacy and security for your documents.
The amount of compression depends on the content of your PDF. Image-heavy documents can often be reduced by 20-50%, while text-only documents may see smaller reductions of 10-30%.
With the "Low Compression" setting, quality loss is minimal. With "Medium Compression", there may be slight quality reduction that's usually unnoticeable. "High Compression" may result in more noticeable quality loss, particularly for images.
No, our tool cannot process password-protected PDFs. You would need to remove the password before compression.
There's no fixed limit, but very large files (over 100MB) may take a long time to process or could exceed browser memory limits. For best results, we recommend files under 50MB.
No, text remains searchable and selectable after compression. Our method preserves the text layers in your PDF.