Compress PDF

Reduce PDF file size securely while preserving quality.

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Table of Contents

Compress PDF - Reduce File Size Online

Shrink large PDF files for easy sharing and uploading. Our smart engine reduces size without compromising readability.

1

Upload PDF

Select your PDF file from your device. We support files up to 100MB for free.

2

Choose Level

Select compression strength: Lossless, High Quality (Recommended), or High Compression.

3

Download

Get your smaller PDF instantly. Files are ready to use for email or web.

Pro Tip: Vector Preservation

Use 'High Quality' for documents with lots of text. It keeps fonts crisp while compressing images. Use 'High Compression' only when file size is the absolute priority.

Intelligent Core

Professional Compression Tools

Our engine analyzes your PDF structure to safely remove bloat without damaging visual integrity.

Ghostscript Power

Leverages the industry-standard Ghostscript engine for reliable, high-fidelity compression.

Layer Separation

Treats text and images differently. Text stays vector sharp; images are optimized efficiently.

Metadata Scrubbing

Automatically removes unused fonts, bookmarks, and XML data that bloat your file.

Instant Result

Optimized serverless backend processes files in seconds, not minutes.

RiseConvert Difference
FeatureBasic ToolsRiseConvert
Text QualityOften Rasterized (Blurry)100% Vector Sharp
Image ResamplingBasic DownscaleBicubic Smoothing
PrivacyUndefinedVerified Auto-Delete
CostFreemium / Watermarks100% Free

Who Needs This?

Optimized for everyone who deals with digital documents.

Professionals

  • Email bulky reports
  • Meet upload limits
  • Archive old contracts

Students

  • Upload assignments
  • Share class notes
  • Save storage space

Webmasters

  • Faster page loads
  • SEO friendly PDFs
  • Bandwidth savings

Trusted by Thousands

See why users rely on our compression engine daily.

"I scan a lot of blueprints. This reduced a 50MB file to 5MB without ruining the lines. Incredible."

D
David K.
Architect

"My university portal has a 5MB limit which is annoying. This tool saved my submission deadline!"

S
Sarah M.
Student

"Fast, clean, and no watermarks. Exactly what I needed for our monthly reports."

J
James L.
Office Manager
Engineering Philosophy

Beyond Simple Compression.
Structural Optimization.

Most PDF compressors simply take every image in your document and smash it into a low-quality screenshot. The resulting file is smaller, but your text becomes blurry and pixelated.

We built a Vector-Aware Engine. Our tool surgically separates the text layers from the image layers. It keeps fonts and vectors untouched (preserving 100% sharpness at any zoom) while applying intelligent compression algorithms specifically to the heavy raster images.

We also employ deep Garbage Collection. PDF files often contain "ghost objects"—content you deleted but that still lives in the file code. Our engine purges these invisible bytes, often reducing file size by 10-20% before we even touch the images.

Crafted by Ex-SaaS Engineers

Vector Smart

Text remains selectable and sharp, never rasterized.

Metadata Purge

Strips XML bloat and unused font glyphs.

AES-256

Military-grade protection during processing.

Understanding PDF Compression

Portable Document Format (PDF) files are containers that can hold text, fonts, vector graphics, and raster images. The primary reason PDFs become large is usually high-resolution images or embedded fonts that aren't fully used.

How Our Compression Works: We use a multi-stage approach. First, we strip unnecessary metadata (like thumbnail caches and editing history). Then, we analyze images. Instead of blindly reducing quality, we use bicubic resampling to lower the resolution (DPI) to standard screen (72 DPI) or print (150 DPI) levels while smoothing pixels. This results in a much smaller file that looks nearly identical to the human eye.

Compression Glossary

DPI

Dots Per Inch. Lowering this reduces image size. 72 DPI is standard for screens; 300 DPI for high-end print.

Lossless

Compression that removes non-visual data so quality remains 100% identical.

Lossy

Compression that simplifies visual data. Much higher reduction but technically lowers quality slightly.

Vector

Mathematical lines/text. These scale infinitely without quality loss and take up very little space.

Frequently Asked Questions

Privacy-First Architecture

Your Data.
Your Control.

We operate on a strict volatile-memory basis. We don't store your files; we process and forget them.

Auto-Wipe

Files are automatically purged from our servers 2 hours after your session.

TLS 1.3 Encryption

All transfers are secured with the highest standard of web encryption.

Live Security Specs
AES-256
Encryption Standard
100%
Automated Cleanup
"Security isn't an option. It's the default."