MegaTooler

Compress PDF

Reduce PDF file size while maintaining quality. Perfect for email attachments and web uploads.

Upload PDF File
Select a PDF file to compress

Choose PDF file

Reduce file size for easier sharing

Compression Levels
Low: Best quality, larger file size. Good for documents with text.
Medium: Balanced quality and size. Recommended for most users.
High: Smallest file size, lower image quality. Best for sharing drafts.
Features
  • • Multiple compression levels
  • • Custom quality settings
  • • Visual progress indicator
  • • Secure client-side processing
  • • No file size limits
Fast & Free

Compress PDFs instantly in your browser. No waiting for uploads or downloads.

Secure

Files are processed locally. Your sensitive documents never leave your device.

Mobile Friendly

Works perfectly on smartphones and tablets. Compress PDFs on the go.

No Limits

Compress as many files as you want. No daily limits or restrictions.

Why Compress PDF Files?

Large PDF files can be difficult to share via email, upload to websites, or store on your device. Compressing your PDFs reduces their file size while maintaining acceptable quality, making them easier to handle and share. Whether you're sending documents to clients, uploading files to cloud storage, or archiving important papers, PDF compression is essential for efficient file management.

Common Use Cases:

  • Email Attachments: Most email providers limit attachment sizes to 25MB. Compress large PDFs to fit within these limits.
  • Website Uploads: Faster page loading times improve user experience and SEO rankings.
  • Cloud Storage: Save valuable storage space by compressing archived documents.
  • Mobile Sharing: Smaller files transfer faster over mobile networks, saving data and time.
  • Document Archiving: Reduce storage costs for long-term document retention.

How to Compress a PDF:

  1. Click "Select PDF File" or drag and drop your PDF into the upload area
  2. Choose your desired compression level (balanced, high quality, or maximum compression)
  3. Click "Compress PDF" and wait a few seconds for processing
  4. Download your compressed PDF file
  5. Compare the file sizes to see how much space you've saved

Compression Tips:

Choose the Right Level: For documents with mostly text, aggressive compression works well. For image-heavy PDFs like brochures or portfolios, use moderate compression to preserve visual quality.

Keep Originals: Always save a copy of your original, uncompressed PDF before compression, especially for important documents.

Test Before Sharing: Open the compressed PDF to verify that text remains readable and images look acceptable before sending to others.

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Frequently Asked Questions
Everything you need to know about using our Compress PDF tool effectively
How does the PDF compression work?
Our tool compresses PDFs by optimizing the images within the document. It converts pages to high-quality images and re-assembles them into a new, smaller PDF file. This is most effective for PDFs containing many images or scanned documents.
Will I lose quality?
You can choose your compression level. 'Low' compression maintains high quality with less size reduction. 'High' compression significantly reduces file size but may slightly reduce image clarity. 'Medium' offers a balanced approach.
Is my data secure?
Yes! All compression happens locally in your browser. Your files are never uploaded to our servers, ensuring 100% privacy and security.
Can I compress password-protected PDFs?
You'll need to unlock the PDF first before compressing it. You can use our Unlock PDF tool to remove the password, then compress the file.
Is there a file size limit?
Since processing happens in your browser, the limit depends on your device's memory. Most standard PDF files (up to 100MB) can be processed easily on modern devices.