How do I compress a PDF?
Upload your PDF (max 10MB), choose compression level (Low/Medium/High), click Compress PDF, and download. Your file is deleted after conversion.
Free PDF Compressor
Compress PDF files to reduce size. Choose Low, Medium, or High compression. Max 10MB, no sign-up required. Requires Adobe PDF Services.
PDF compression uses Adobe PDF Services. Daily limits: 2 for guests, 5 for signed-in users.
- No registration required
- Files deleted after conversion
- Max 10MB per file
- Free to use
How Compress PDF works
Upload one PDF (max 10MB) and choose a compression level: Low for minimal quality loss, Medium for a balance, or High for maximum size reduction. We process the file on our servers and return a smaller PDF. Your original is not stored and is deleted after you download. Smaller PDFs are easier to email, upload to forms, or store. Compression works by reducing image resolution and optimizing the PDF structure while keeping text and layout readable.
When should you use Compress PDF?
- When your PDF is too large to email or upload
- When you need to meet a strict file size limit for submissions
- When you want to save storage or bandwidth
- When sharing reports or presentations that contain images
- When archiving documents and want smaller files
Supported formats
Input formats: PDF only. Single file, max 10MB. Requires Adobe PDF Services.
Output formats: Compressed PDF. Same format; reduced file size.
Common problems & fixes
- Compression fails or times out: Keep the file under 10MB. Ensure the PDF is not password-protected and opens normally.
- Quality loss is too high: Use the Low compression level for minimal quality loss. High compression reduces size most but can affect images.
- Usage limit reached: Guests: 2 per day; signed-in users: 5 per day. Limits reset at midnight. Sign in for a higher limit.
Frequently Asked Questions
What are the usage limits?
Guests: 2 compressions per day. Signed-in users: 5 per day. Limits reset at midnight.
Does compression affect quality?
Higher compression reduces file size but may slightly reduce image quality. Choose Low for minimal quality loss, High for maximum size reduction.
Is my file stored?
No. Files are deleted automatically after processing.
Does this work on mobile?
Yes. The compressor is fully responsive.
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