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PDF Compressor – Reduce PDF Size Online Free
NewTrendingCompress PDF files to reduce size for email or web — without losing visible quality. Choose compression level and download instantly, no uploads needed.
PDF Compressor
100% private · runs in your browser · no upload
Drag & drop your PDFs here
or browse files
Drop one or more PDF files above to get started.
Works with multi-page documents, scanned PDFs, and more.
What is PDF Compressor?
Reduce PDF file size with adjustable compression levels (low/medium/high). Displays before-and-after file size. Browser-side processing using PDF.js — files never leave your device.
PDF Compressor Features
3 Compression Levels
Low (quality-first), Medium (balanced), High (size-first).
Before/After Comparison
See exact file size reduction before downloading.
100% Private
Browser-side processing — your PDF never leaves your device.
No File Size Cap
No server limits — only your device memory applies.
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PDF Compressor FAQ
Low and Medium compression maintain sharp text and images. High compression reduces embedded image resolution slightly but keeps text perfectly clear.
No strict limit — performance depends on your device memory. Most PDFs under 100 MB process without issues.
PDFs that contain mostly text (no embedded images) compress very little since text is already highly compact. Large reductions come from compressing embedded images within the PDF.
No — text content, fonts, and document structure are preserved at all compression levels. Only embedded image data is affected.