PDF files generated by scanners, layout engines, and office suites often contain uncompressed raster streams, redundant font subsets, and high-DPI imagery that push file sizes beyond strict email attachment limits (usually 20MB-25MB).
Our client-side PDF Compressor recalculates raster image stream densities while leaving text vectors and document outlines untouched.
1. Compression Preset Levels
| Preset | Target DPI | Image Quality | Recommended Scenario |
|---|---|---|---|
| Extreme | 72 DPI | Low / Medium | Low-bandwidth mobile delivery, quick review |
| Standard | 150 DPI | Balanced | Official email attachments, job applications |
| Light | 300 DPI | High | Crisp reading on 4K screens & high-grade printing |
2. Step-by-Step Optimization Guide
Step 1: Ingest Your Document
Drag and drop your PDF into the upload area. The tool parses page count, embedded font resources, and stream footprints.
Step 2: Select Optimization Profile
Choose between Extreme, Standard, or Light compression.
Step 3: Run & Download
Click Compress PDF. Monitor real-time reduction stats (e.g., -68% byte reduction) and save the output.
If a PDF requires a user or owner password to decrypt, you must unlock it before passing it through the compression engine.