How to use Compress PDF Online
- 1 Add one PDF file.
- 2 Choose Best, Normal, or High compression.
- 3 Set the output filename and start compression.
- 4 Download the result and check text, images, and page order.
Compress PDF Online
Reduce the file size of one PDF for email, upload forms, or sharing. Choose Best, Normal, or High compression according to how much visual change you can accept. Image-heavy and scanned documents often shrink differently from text-based PDFs, and an already optimized file may not become much smaller.
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Load PDF File
Drag and drop a PDF here, or select from your computer.
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Uploading PDF...
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Compression Setup
Output strategy
Quality Profile
High compression keeps color but can reduce image detail to reach a much smaller file. Use Best or Normal for gentler output.
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Best quality profile is selected.
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Balancing PDF size and readability
Best applies the gentlest reduction and is the safer starting point for documents with small text, diagrams, or detailed images. Normal uses stronger color-preserving compression for everyday files. High aims for the strongest reduction and may rebuild pages with less image detail, so review the whole document before sharing it.
Results vary with the PDF. Scans and photo-heavy documents may offer more room for image compression, while text-based or previously optimized files may change very little. Compression does not repair damaged documents, and no profile guarantees a particular output size.
Compress PDF Online FAQ
Which compression profile should I choose?
Start with Best when readability matters most, use Normal for everyday reduction, and choose High only when a smaller file is more important than image detail.
Will compression reach a specific file size?
No specific size is guaranteed. The available page controls use compression profiles, and the result depends on the document's existing content and encoding.
Why did my PDF shrink only a little?
A PDF that mainly contains text or already compressed images may have little redundant data left to remove without a larger quality change.
Does the original PDF get overwritten?
No. The tool creates a separate compressed PDF for download. Keep the original until you have checked the result.