Free PDF Compressor Online
Compress PDFs using our advanced Dual-Engine. Use Standard Mode for lossless text optimization, or Scanned Mode to hit exact target sizes (e.g., 100KB, 200KB, 300KB, or 500KB) for forms and marksheets.
How to Compress PDF Files Online?
Reducing the size of your PDF documents is simple with our free online PDF compressor. Just follow these 4 quick steps:
1. Upload your PDF
Drag and drop your file into the designated area or click to browse your device.
2. Choose Mode
Select 'Standard (Text)' for normal documents or 'Scanned (Images)' for marksheets.
3. Adjust Settings
If using Scanned mode, input your exact target size (e.g., 500KB) and enable Grayscale if needed.
4. Compress & Save
Click 'Apply Compression' and watch the magic happen. Save the newly compressed PDF!
Why use a Dual-Engine PDF Compressor?
Most compressors apply a one-size-fits-all approach, which often ruins the quality of text documents or fails to reduce the size of scanned images enough. Our tool uses a cutting-edge Dual-Engine architecture:
1. Lossless Structural Engine
Cleans up invisible metadata, unused fonts, and bloated streams from text PDFs, ensuring 100% crisp, selectable text with zero quality degradation.
2. Advanced Rasterization Engine
Converts heavy scanned documents into highly optimized images, iteratively calibrating quality to hit your exact target size perfectly.
Frequently Asked Questions
Is this tool really free?
Yes! Our PDF compressor is 100% free to use. There are no hidden fees, subscriptions, or watermarks added to your documents.
Are my files secure?
Absolutely. Your privacy is our priority. All compression happens directly in your browser using local processing. Your files are never uploaded to any external server.
How can I compress a PDF to exactly 100KB, 200KB, or 500KB?
Select 'Scanned (Images)' mode and enter your target size in the Max Target Size input box. Our engine will automatically calibrate the document to fit under the requested size.
What does the Black & White option do?
Converting colored marksheets to Grayscale drastically reduces the file size footprint. This allows the compressor to output a much crisper document at tiny file sizes.
Will my text remain copyable?
Yes! If you select 'Standard (Text)' mode, we use lossless structural compression. Your text will remain 100% crisp, selectable, and search-friendly.
Can I compress password-protected PDFs?
Yes, our tool allows you to unlock encrypted PDFs directly in your browser. Just enter the password when prompted, and you can compress the document seamlessly.
Is there a limit on the file size I can upload?
Since our PDF compressor runs entirely in your local browser, there are no strict upload limits or server constraints. Compress files as large as your device's memory can handle!
Does this tool work on mobile phones?
Yes! Our compressor is fully optimized for all devices, including smartphones and tablets. You can easily compress PDFs on the go directly from your mobile browser.