PDF Compressor
Compress PDF files online for free. Reduce PDF file size in KB or MB to 100KB, 200KB, 500KB or 1MB without losing quality. 100% private in-browser compression.
Drop your PDF or scanned document here
or browse from device · Single or Batch multi-file · 100% Private
How to Use PDF Compressor
3 Easy Steps- Upload Large PDFSelect the PDF file that exceeds your email or government portal upload limits.
- Choose Compression StrengthSelect Recommended (good quality, 60% reduction) or Maximum compression (up to 80% reduction).
- Download Compact PDFSave the optimized PDF file ready for instant email sharing, job applications, or portal submissions.
Why PDF File Compression Matters
Most government portals in India (such as UPSC, SSC, state service commissions, and university admission forms) enforce strict file upload limits, typically capping PDFs at 1MB, 500KB, or even 200KB. Attempting to submit uncompressed scanner output inevitably leads to failed upload errors.
Etool Mitra PDF Compressor optimizes the internal structure of PDF documents by downsampling oversized embedded raster images and stripping redundant font subsets, drastically lowering file weight without making text unreadable.
Downsampling Scanned Documents vs Vector Reports
Commercial office and photocopy shop scanners often capture documents at 300 to 600 DPI, which balloons a simple two-page certificate into a 15MB file. Downsampling imagery to a balanced 150 DPI produces visually identical on-screen viewing while eliminating up to 75% of the file size.
For digitally authored PDFs generated from Word or Excel, our compression engine purges unreferenced objects and duplicate metadata streams, preserving razor-sharp vector typography.
Privacy and Client-Side Optimization
Confidential bank statements, salary slips, and legal agreements must never be uploaded to unknown third-party servers. All processing in our PDF Compressor takes place directly inside your device memory using browser-native WebAssembly.
Frequently Asked Questions
Quick answers about PDF Compressor, formats, and specifications.
Will compressing a PDF make the text blurry or unreadable?
No, vector text streams and fonts remain completely sharp. Only oversized embedded scan images are optimized.
How do I compress PDF files on a smartphone?
Open this page on your Android or iPhone browser, tap the upload zone, pick the PDF from your downloads, and tap Compress PDF.
What is the maximum reduction in PDF file size possible?
Depending on embedded image density, file size can be reduced between 40% and 80% while retaining clean legibility.
How can I shrink PDF file size for government portal upload limits?
Select Recommended or Maximum compression to quickly shrink 5MB-10MB documents under standard 1MB or 500KB requirements.
Are my confidential PDF documents uploaded or stored on servers?
Never. All PDF compression runs 100% locally on your device via client-side code; zero bytes are uploaded to remote servers.