Reduce PDF File Size Online
Sending a large PDF that gets bounced by email? Reduce its file size here in seconds. Our compressor removes hidden data, optimizes streams, and can dramatically shrink your PDF — all without touching the visual quality.
Drop your PDF file here
Select a PDF to compress
Max 100 MB per file
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Why Use This Tool?
How to Reduce PDF File Size Online
Upload PDF
Drop your PDF file into the upload zone or click to browse.
Choose Level
Select Low, Medium, or High compression based on your quality vs. size preference.
Compress & Download
Hit compress and download your smaller PDF. See the before/after size comparison.
Frequently Asked Questions
Large PDFs often contain embedded high-resolution images, duplicate data, or unused objects. Our tool cleans all of this to produce a smaller file.
There is no hard limit — your browser memory is the only constraint. Most PDFs up to 500 MB process without issues on modern devices.
On Low compression, printing quality is preserved perfectly. On High compression, very fine image details may soften slightly.
Start with Medium compression. If the output is still too large, try High. For very large targets, use our Split PDF tool to divide the document first.
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