Free Compress PDF
Shrink a PDF file size with three compression levels to choose from. See the exact before and after size before you download.
Compress PDF
Reduce PDF file size right in your browser with adjustable quality.
🔒 Files never leave your device — everything runs in your browser.
Shrink a PDF Without Guessing the Result
Fast, private and completely free.
Three Compression Levels
Choose Extreme for the smallest possible file, Recommended for a balance, or Light to keep the most detail.
See the Real Savings
The exact before and after file size is shown, so you know precisely how much smaller the file got.
Compress Several Files at Once
Batch compress multiple PDFs together instead of one at a time.
Your File Never Leaves Your Device
Compression happens entirely in your browser, the PDF is never uploaded to a server.
Honest About What It Can Do
If a file is already well optimised, the tool tells you rather than pretending to shrink it further.
No Waiting on a Slow Upload
Since there is no upload step, compression starts immediately.
Compress Your PDF
Three simple steps.
Add Your PDF
Drop in one file or several at once.
Choose a Compression Level
Pick Extreme, Recommended or Light depending on how much size reduction you need.
Download the Smaller File
Save the compressed PDF, with the size savings shown clearly.
What Actually Makes a PDF File Large
Most oversized PDFs are large because of the images inside them, scanned pages, high resolution photos or screenshots, rather than the text itself. Compression works mainly by re-encoding those images at a lower quality that is still visually close to the original.
Choosing the right compression level matters here, since squeezing a file too hard can leave scanned text looking blurry or hard to read.
Choosing the Right Compression Level
A rough guide to the three levels:
- Extreme, for when file size matters more than anything, like meeting a strict email attachment limit
- Recommended, a solid middle ground for most everyday documents
- Light, when the PDF has fine detail you do not want to lose, like design work or technical diagrams
Why Some PDFs Barely Shrink at All
A PDF that is mostly text, with no images, is usually already small and efficient, since text takes up very little space compared to images. If a file does not shrink much after compression, that is often a sign it did not have much room to save in the first place.
Frequently Asked Questions
How much smaller will my PDF get?
It depends on the file and the level chosen, but PDFs with lots of images or scanned pages usually see the biggest reduction.
Which compression level should I use?
Recommended works well for most documents. Use Extreme if file size is critical, or Light if you want to keep the most visual detail.
Can I compress several PDFs at once?
Yes, you can add multiple files and compress them together.
Will compression make scanned text hard to read?
At the Recommended or Light setting, text usually stays clear. Extreme compression can reduce fine detail on scanned pages.
Is my document uploaded to a server?
No, the PDF is compressed entirely in your browser and is never uploaded anywhere.
What if my file is already small?
If a file is already well optimised, the tool will let you know rather than claiming a saving that is not really there.
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