PDF Compressor
Securely reduce the size of your PDF files online for free. Our tool compresses PDFs in your browser, ensuring your data remains private.
How It Works
Step 1: Upload Your PDF
Drag and drop your PDF file into the upload area, or click to select a file from your computer. The tool works entirely in your browser.
Step 2: Choose Compression Level
Select from multiple compression levels: 'Recommended' for a great balance of size and quality, or 'Maximum' for the smallest possible file size.
Step 3: Compress Instantly
Click the 'Compress PDF' button. Our tool will quickly process the file without uploading it to any server.
Step 4: Download Your File
See the final file size and the reduction percentage. Click the 'Download PDF' button to save your newly compressed file.
Drag & Drop or Click to Upload
Your files will be processed securely in your browser.
A Note on Our Method
This tool compresses PDFs on your device to protect your privacy, but this approach has trade-offs. It works best for files with large images.
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Compressing Your PDF...
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Key Features
Total Privacy
Compresses files directly in your browser. Nothing is ever uploaded, so your sensitive documents stay safe.
Adjustable Compression
Choose from different compression levels to find the perfect balance between file size and quality.
Instant Preview
See the original and estimated compressed file size before you even start the process.
No File Limits
Compress as many PDFs as you want, for free, with no sign-ups or daily restrictions.
Works Offline
Once the page is loaded, the tool can function even without an active internet connection.
Universal Compatibility
Works on any modern browser on Windows, Mac, Linux, Android, and iOS.
Secure & Instant PDF Compression
Reduce the size of your large PDF files quickly and easily with our free online PDF Compressor. Perfect for sharing files via email or saving space on your device, our tool optimizes your documents for a smaller size while maintaining a readable quality. Unlike other services, we prioritize your privacy by performing all compression directly in your browser, meaning your files are never uploaded to our servers.
Your Files Never Leave Your Computer
Most online PDF compressors require you to upload your documents to their servers, exposing your data to potential risks. Our tool is different. It uses powerful browser-based technology to compress your PDFs directly on your own device. This means your sensitive information remains completely private and secure from start to finish.
Frequently Asked Questions
Is my data safe with this tool?
Absolutely. All compression happens directly on your computer within your browser. Your files are never uploaded to our servers, ensuring 100% privacy and security.
Is this PDF compressor really free?
Yes, our tool is completely free to use without any hidden costs or limitations on the number of files you can compress.
Why didn't my file get much smaller?
Our tool's #1 priority is your privacy, so it runs entirely on your device. This special browser-based method is excellent at shrinking PDFs that contain images. However, some documents, like simple text-only files, are already very efficient and cannot be compressed further with this method. We always provide you with the smallest possible version.
How much will the file size be reduced?
The reduction percentage depends on the original file's content and the compression level you choose. PDFs with large images will see the most significant reduction. The tool will show you the final size before you download.
Will compressing a PDF affect its quality?
Compression primarily reduces the quality and resolution of images within the PDF to make the file smaller. Text quality is generally unaffected. We recommend the 'Recommended' setting for a good balance.
What is the maximum file size I can upload?
Since the tool runs on your device, there is no hard server-side limit. However, very large files (over 1GB) may be slow or fail to process depending on your computer's memory and browser capabilities.
Does this tool work on Mac, Windows, and mobile?
Yes, because it runs in your web browser, our PDF compressor works on all modern operating systems and devices, including Windows, macOS, Linux, iOS, and Android.