PDF Compressor

How to Compress PDFs

1. Upload or drop your PDF into the compressor grid and choose your target level (Standard, Maximum, or High Quality).
2. Review current file scale size and predicted compressed footprint ratios.
3. Click the run button to safely compress bulky embedded images and font outlines.
4. Save your newly optimized, lightweight PDF document.

Key Features

• Three-Tier Compression presets for highly adaptive quality controls.
• Image Rescaling & Downsampling: Safely compresses bulky embedded pixel elements.
• Live Footprint Analytics: Real-time monitoring of original vs compressed bytes.
• Text and Vector Preservations: Key font outlines, layout boxes, and equations stay sharp.

Common Use Cases

• Optimize official resumes, application docs, and letters for strict upload size limits.
• Shrink heavy presentation slides, graphics manuals, and reports for clean email attachments.
• Minimize archive storage limits on device hard drives and shared client-side folders.

Frequently Asked Questions

How does browser-based PDF compression work?

Our compressor opens the document locally using the pdf-lib library, unpacks individual pages and streams, and re-imports them into a brand-new PDF structure. This discard-and-rebuild flow removes redundant font entries, structural gaps, duplicate dictionary arrays, and editing revisions, returning highly compact documents.

What are the differences between Low, Medium, and Extreme levels?

Low preset builds a clean PDF template with compressed object streams without stripping user metadata. Medium preset removes document metadata tags (author, subject, etc.) but retains functional structures. Extreme preset goes further to completely discard all page annotations, links, and forms to achieve maximum compression ratio.

Is my confidential or personal PDF content safe?

Yes, absolutely. The optimization process operates entirely inside your own browser tab. No byte segments, images, or metadata flags from your PDF files are ever transmitted to external web servers, guaranteeing complete compliance and security.