Reduce PDF file size directly in your browser. Choose a compression
level, process your PDF locally, compare the file sizes, and download
the optimized PDF.
📄
Upload or Drop Your PDF
Select a PDF file to begin compression.
File Name
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Original Size
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Pages
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Higher compression may reduce visual quality more noticeably.
Browser-side PDF rendering and rebuilding
Your selected PDF is processed locally by the browser.
Important:
This compression method rebuilds PDF pages as compressed images.
The resulting PDF may not preserve selectable text, searchable text,
annotations, form fields, links, or vector elements exactly as the
original.
A PDF Compressor reduces the size of a PDF document so it can be
easier to store, upload, email, or share online. The amount of
compression available depends on what is inside the original PDF.
How Does This PDF Compressor Work?
This browser-based tool reads the PDF locally, renders each page at
a controlled resolution, converts the page image to JPEG, and builds
a new PDF from the compressed page images.
Why Can Compression Results Vary?
A PDF containing high-resolution photographs may offer significant
compression opportunities. A PDF that is already highly optimized,
mostly vector-based, or already compressed may produce little size
reduction or even become larger after rebuilding.
Does the Original Text Stay Selectable?
Not necessarily. This version prioritizes practical browser-side
compression. Because pages are rebuilt as images, selectable text,
links, forms, annotations, and other PDF features may not be preserved
in the same way as the source document.
Privacy:
The compression process runs in your browser. The page does not
intentionally upload your selected PDF to a SmartToolsHouse server.
Frequently Asked Questions
Is the PDF Compressor free?
Yes. The tool is free to use without requiring registration.
Does my PDF get uploaded to a server?
The basic compression process is performed locally in the browser.
The tool does not intentionally send the selected PDF to a
SmartToolsHouse server.
Will the compressed PDF always be smaller?
No. Some PDFs are already well compressed. Rebuilding such a PDF can
result in little reduction or even a larger output file. The tool
reports the actual size comparison instead of claiming guaranteed
compression.
Will text remain selectable?
Not necessarily. This version rebuilds pages as images, so original
text layers, links, forms, and annotations may not remain
selectable or interactive.
Which compression level should I use?
Balanced is a good starting point. High Compression is designed to
prioritize smaller files, while Better Quality uses higher rendering
quality and can produce larger output files.
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