Smart compression
Subset embedded fonts, deduplicate streams, and recompress oversized images in one local pass.
Compress PDF Online — Reduce PDF File Size Free
Smart font and image optimization · selectable quality · 100% local
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Compress PDF Tool
Reduce PDF size with font subsetting, stream optimization, and quality-aware image downsampling.
PDFAccepted inputUp to 30Bulk workflowNo uploadRuns in this browser
Three quality levels
Choose 300 DPI for print, 150 DPI for sharing, or 72 DPI for the smallest file.
Native text preserved
Searchable text and vector page content stay native instead of becoming page screenshots.
Never make it larger
If optimization cannot save space, the original PDF is returned byte for byte.
How to use Compress PDF
Choose your files
Select one or more supported files from your device. The source remains under your control.
Configure compress pdf
Review the available settings and preview the intended result before processing.
Process in your browser
The operation runs in this browser without an implicit file upload.
Review and download
Inspect the result, then save the new file. Your original source is left unchanged.
Compress PDF questions
Which compression level should I choose?
Medium is the best default for email and sharing. Use Light for print-ready documents and Heavy when minimum size matters most.
Will compression make text blurry?
No. Native text and vectors remain native. The quality level controls embedded colour and grayscale images.
Does my PDF leave the browser?
No. A dedicated WebAssembly worker performs the complete compression pass locally.
Merge PDF
Combine PDF files into one native, searchable document.
PDF to ZIP
Bundle multiple PDFs into one local ZIP, with optional visual page selection when needed.
Privacy Scanner
Inspect native text, metadata, scripts, attachments, links, annotations, and revision history without uploading the PDF.