Compress PDF
Compress PDF documents online to shrink file size for easier email sharing and website uploading. 100% private, client-side processing.
Upload PDF to Compress & Reduce File Size
Compress embedded images and scans, reduce file size by up to 80%, and inspect pages with live document preview.
Step-by-Step Instructions
Upload Large PDF Document
Select or drop your multi-page PDF, scanned book, presentation, or portfolio into the PDF compressor.
Select Compression Profile
Choose from Extreme Compression (maximum size reduction for email), Recommended Compression (balanced quality and size), or Less Compression (high quality for print).
Optimize Images & Font Streams
The engine downsamples embedded raster images, removes duplicate font subsets, and cleans redundant metadata.
Download Compressed PDF
Save your lightweight, optimized PDF file with up to 70-90% reduction in file size.
Key Features & Capabilities
- Multi-stage PDF optimization: image downsampling (DPI reduction), DCT JPEG re-compression, font stream deduplication, and metadata pruning
- 3 tailored compression presets: Extreme (email friendly), Recommended (web publishing), and High Quality (print ready)
- Shrinks bloated multi-megabyte scanned PDFs and presentations by up to 70-90%
- Preserves searchable text layers, vector illustrations, hyperlinks, and bookmarks
- High-speed WebAssembly client-side optimization with zero server delay
- 100% confidential in-browser processing: private tax forms and business reports are never uploaded
Frequently Asked Questions
How does the PDF compressor reduce file size without ruining text clarity?
PDF file bloat is almost always caused by uncompressed high-resolution images and duplicate embedded fonts. The compressor re-encodes embedded images using modern JPEG/Flate compression and strips unused font glyph subsets while leaving vector text paths 100% crisp and searchable.
What compression level should I choose for emailing PDF attachments?
Choose 'Recommended' or 'Extreme Compression' for email. Most email providers (like Gmail and Outlook) limit attachments to 20MB–25MB. Compressing reduces a 50MB PDF to 3MB–5MB easily.
Will compressed PDFs still be compatible with Adobe Acrobat and mobile viewers?
Yes. The output conforms strictly to standard ISO 32000-1 PDF specifications and opens flawlessly in all PDF readers and web browsers.
Are my private financial records or medical files uploaded to any server?
No. All PDF parsing, image re-compression, and stream optimization execute locally inside your web browser sandbox. No data is sent over the internet.
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