PDF Compress
Reduce PDF file size with optimization presets and metadata removal. Batch mode for multiple files. Free in your browser, no upload.
Compress PDF — Reduce File Size, Free in Your Browser
The PDF Compressor reduces your PDF file sizes without losing text or formatting. All processing runs entirely in your browser — no files are sent to any server.
Why Compress PDFs?
Many email providers cap attachments at 25 MB (Gmail, Outlook). German tax filing systems like ELSTER have their own upload limits. Scanned documents are often unnecessarily large — a single scan can easily reach 10–30 MB. Compression brings files down to a fraction of their original size.
Quality Levels
- Low compression — Minimal quality loss, moderate size reduction. Ideal for documents with important graphics.
- Medium compression — Good balance between quality and file size. Recommended for most use cases.
- High compression — Maximum size reduction. Images are compressed more aggressively. Ideal for text-only documents or email attachments.
Lossless vs. Lossy
Lossless compression optimizes redundant data structures in the PDF — fonts are deduplicated, unused objects removed, and streams recompressed. Text and vector graphics remain pixel-perfect. Lossy compression additionally reduces the resolution of embedded images, which has the biggest effect on scanned documents.
Privacy
Your PDF never leaves your computer. Compression happens locally in the browser. No upload, no server, no cloud — ideal for confidential documents like payslips or contracts.