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Reduce PDF file sizes while keeping text and images readable. Processes locally.
How to Make Custom Phone Ringtones
Audio engineering guide: slice songs into clean 30s ringtones for iPhone (M4R) and Android (MP3) with zero-crossing cuts and seamless loop fades.
How to Make Custom Ringtones
The PDF Compressor downsamples embedded image streams and optimizes font dictionaries to reduce heavy PDF documents down to email-safe sizes without sacrificing typography sharpness.
How to Use
Select any heavy PDF, scanned report, or slide deck exceeding email or portal limits.
Choose Recommended (70-80% savings), Strong, or Maximum compression while preserving text legibility.
Image stream downsampling at 150 DPI with crisp text vectors
Save your optimized document under target MB limits ready for email attachments and web forms.
Choose from our compression presets (Recommended, Strong, or Maximum). Scanned documents with embedded color images compress significantly (often 50% to 75% smaller) while retaining crisp text legibility.
How much a PDF compresses depends entirely on its internal format and content: Scanned PDFs contain high-resolution raster images (JPEG/PNG page scans), which compress dramatically by 50% to 80% through smart downsampling and re-quantization. In contrast, digital PDFs generated from Word, LaTeX, or Google Docs already consist of ultra-compact vector text, embedded font subsets, and vector shapes. Because vector text cannot be 'compressed' without losing document structure, digital PDFs yield smaller percentage reductions (10% to 30%) by stripping unreferenced metadata and optimizing font streams.
Pure text and vector PDFs are inherently compact. Compression cleans unreferenced objects, optimizes font subsets, and strips duplicate resource streams to shave off extra kilobytes without rasterizing vector text.
The recommended compression profile balances downsampling with contrast preservation so that fine print, dates, signatures, and stamps remain sharp and readable on both screens and printouts.
If a PDF is already heavily compressed or consists primarily of pre-optimized monochrome vector outlines, additional compression yield is minimal because there is no redundant image data to strip.