Reduce PDF file size directly in your browser. Choose the balance you want between smaller size and visual quality.
PDF
Drop your PDF here
or choose a PDF from your device
Your file is processed in your browser for this compression workflow.
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PDF selectedReady to compress
Important: pages are rebuilt as optimized images for stronger size reduction. Searchable/selectable text, links, forms and some accessibility data may be lost.
Higher render quality can improve clarity but may increase the output size.
Preparing PDF…0%
Large PDFs can take longer because pages are processed one at a time.
1Choose your PDF
2Select compression
3Compress in browser
4Download the smaller copy
Compress PDF Online Free
PraxTools Compress PDF helps reduce PDF file size for easier email sharing, uploads and storage. The compression runs in your browser and rebuilds pages using optimized images.
Which compression level should I choose?
Balanced is the recommended starting point for most documents. Choose Good when small text or visual detail matters more, or Small when reducing file size is the main priority.
How to reduce PDF file size
Choose or drag a PDF into the tool.
Select Good, Balanced or Small compression.
Adjust render quality if needed.
Click Compress & Download and check the downloaded copy before sharing it.
Will text and links stay searchable?
Not necessarily. This tool can rebuild PDF pages as images to achieve stronger reduction, so text selection, search, links, form fields and some accessibility information may be removed.
What PDFs need extra care?
Documents with fine print, engineering drawings, signatures, QR codes, barcodes or dense tables should be checked carefully after compression. Use a higher-quality setting if important detail becomes difficult to read.
Frequently asked questions
Is this PDF compressor free?
Yes. You can use the PraxTools PDF compressor without creating an account.
Why can a compressed PDF sometimes become larger?
If the original PDF already uses efficient compression, rebuilding pages as images can occasionally create a larger output. Try a lower render quality or stronger compression level.
Does the PDF upload to the PraxTools server?
This compression workflow runs in the browser using PDF libraries loaded by the page. Your selected PDF is processed locally by the browser for the compression operation.
Can I compress a PDF on mobile?
Yes. Modern mobile browsers can use the tool, though very large PDFs may be slower or use significant device memory.