Creates a new optimized PDF without overwriting the original.
Server-assisted processingThis operation can require temporary server-side processing. Avoid uploading information you are not permitted to process and review the Privacy Policy for retention and handling details.
PDF optimization
Compress PDF
Browser optimization rebuilds PDF structure. Strong image downsampling requires Ghostscript on the server.
How to use Compress PDF
- 1Choose the requested files.
- 2Adjust the available options.
- 3Process and review the result.
- 4Download the finished file.
About Compress PDF
Reduce PDF file size using available server processing. Use it when you need the result without the overhead of opening a larger application. For anything important, compare the output with your source and keep the original until you are satisfied with the result.
What this tool does
Compress PDF reduces PDF file size by optimizing document structure in the browser or, when available, using server-assisted compression for stronger reduction.
Common use cases
- Reduce a PDF before email or upload
- Optimize reports and scanned documents
- Create a smaller sharing copy
Limitations
- Browser optimization may produce only modest savings when images already dominate file size.
- Server-assisted compression can change image quality and should be reviewed before replacing the original.
Privacy & processing
Server-assisted processing
This operation can require temporary server-side processing. Avoid uploading information you are not permitted to process and review the Privacy Policy for retention and handling details.
Example results
If the result does not look right
- If the output is not smaller, the PDF may already be optimized.
- Keep the original and visually inspect compressed pages before important use.
Last tested: 2026-09-03
V50 deterministic render, static JS/control audit and responsive layout checks
- ✓ PHP page renders without a fatal/parse error
- ✓ Primary controls and labels are present
- ✓ Invalid or missing input has a recoverable error path
- ✓ Responsive layout checked at 390px and 1365px in V50 local QA
- ✓ Keyboard focus and status region are available
Trust, methodology & corrections
Get Tools Lab documents how tools are designed, reviewed and corrected. We do not claim external certification unless it is explicitly documented.
Answers about Compress PDF
What does Compress PDF do?
Reduce PDF file size using available server processing.
Will Compress PDF change the original file?
The tool creates a new output for you to review. Keep the original until you have checked the result, especially when layout, image quality, metadata, or page order matters.
What is a common reason to use Compress PDF?
A common use is to finish the compress pdf task quickly without opening a larger desktop application.
What should I watch out for when using Compress PDF?
Check the input format and review the output before replacing an original file or using the result in an important workflow.
How do I get a better result with Compress PDF?
Start with a clean input, use the simplest settings that meet your goal, and compare the result with the original before you download or reuse it.
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