No. Our compression engine selectively downsamples embedded raster photos and flattens metadata while preserving embedded vector typography, outline glyphs, and searchable text layers with 100% crispness.

Yes. Your documents are processed strictly in volatile memory using PyMuPDF and deleted immediately upon delivering the response. We never store, log, or share your document contents.

Depending on the original file contents and selected preset, typical reductions range from 40% up to 85%. Scanned documents and image-heavy PDF reports achieve the highest compression ratios.

Recommended (150 DPI) provides the ideal balance between visual quality and file size for web/email; Maximum (72 DPI) achieves the smallest file size for strict portal limits (<2MB); Light (300 DPI) preserves high-resolution graphics for print-ready documents.

You can upload PDF files up to 25MB. Processing is completed in seconds with real-time progress indicators and instant automatic download.

To compress an encrypted PDF, please unlock or remove the password protection before uploading. Standard unencrypted PDFs are processed without issues.

PDF Compressor supports 21 desktop shortcuts: '/' to browse files, 'Alt+P' to auto-detect clipboard PDF/Base64/JSON, 'Ctrl+Enter' to compress, 'Alt+D' to star/bookmark tool, 'Alt+R' to load benchmark scenarios, 'Alt+V' to toggle 2-Column Split Studio vs Stacked layout, 'Alt+S' for Developer API Code, 'Alt+K' or '?' for Shortcuts Guide, 'Alt+1' through 'Alt+6' for 1-Click Quick Copy formats (Markdown, JSON, CSV, SHA-256, CLI command, Python script), 'Alt+N' to clean filename slug, and 'Esc' to clear workspace.

Yes! You can visually inspect your compressed PDF directly in the interactive Live PDF Preview sandbox before downloading, copy or download a structured JSON audit report (.json), export an RFC 4180 CSV matrix (.csv), copy a Markdown summary table, or open Developer API snippets across 5 programming languages.

Yes. You can use the ready-to-use developer snippets (Alt+S) in Python (PyMuPDF), Node.js (fetch), Go, PHP, or cURL. The REST endpoint POST /api/pdf/compress processes files in-memory without persistent disk storage.

You can define a custom output file prefix in the naming configuration card. Toggling 'Append Date Suffix' appends the current date stamp (_YYYY-MM-DD) to ensure organized, chronological archival of compressed documents.