PDF Compressor
1. Upload PDFs
Drop PDF files here
or click to browse
You can select multiple files at once.
2. Detection mode
Auto-detect
Classifies each PDF and routes it automatically.
Force: Scanned
MRC engine (compress-mrc-pdf.js) — for scanner/OCR output.
Force: Normal
Digital engine (compress-normal-pdf.js) — for authored PDFs.
3. Compression level
Low
Highest quality, smallest reduction. Best for archival copies.
Medium
Balanced quality and size. Good default for most PDFs.
High
Smallest file size, most aggressive compression.
Force grayscale (scanned)
Dry run (no files written)
Run compression
Progress
Starting…
0%
Show detailed log
Summary
