Are my sensitive PDF documents uploaded to your server?

Never. All PDF compression, page rendering, and stream re-encoding execute 100% locally inside your browser memory using PDF.js and PDF-Lib. Your confidential documents, bank statements, and tax returns never touch any external server.

How does client-side PDF compression reduce file size?

The tool analyzes each page, quantizes embedded high-resolution raster images, downsamples excessive DPI resolution (from 600+ DPI down to 150 or 72 DPI), and strips redundant metadata headers.

What is the best compression preset for email attachments?

The 'Recommended (150 DPI)' preset is ideal for email attachments and job applications, delivering 50% to 70% file size reduction while maintaining crystal-clear text readability.

100% Private PDF Engine • Zero Upload to Cloud • GDPR Safe

Client-Side PDF Compressor & Optimizer

Reduce PDF file size up to 80% directly in your browser. Choose compression presets (72, 150, 300 DPI) for email attachments, legal documents, and official portals.

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100% In-Browser

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Supports contracts, scans, invoices & presentations

Compression Level

0 Pages

Extreme Compression (72 DPI) Max Savings

Lowest file size (~80% reduction). Best for strict upload limits (<500KB).

Recommended Quality (150 DPI) Balanced

Optimal balance of crisp text and 50–70% size reduction. Great for email & job applications.

Light Compression (300 DPI) Print Ready

Preserves ultra-sharp vector details. Ideal for commercial printing & legal archives.

PDF Compression Summary 0% Reduction

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PDF Optimization & File Size Standards (2026)

Why client-side PDF compression is essential for enterprise privacy, email delivery limits, and government portal compliance.

GDPR & HIPAA Compliance

Never upload sensitive legal contracts, employee resumes, or financial tax statements to unknown third-party cloud servers. Local browser processing guarantees 100% confidentiality.

Beat Email 25MB Caps

Corporate email servers reject attachments exceeding 20MB–25MB. Compressing presentation slides and scanned documents down to 2MB–5MB ensures instant inbox delivery.

Portal Upload Limits

Visa applications, court filing systems, and university admissions portals strictly cap file uploads at 500KB to 2MB. Use our Extreme (72 DPI) preset to fit exact thresholds.