PDF Compressor
Reduce PDF file size by removing metadata and optimizing structure. 100% client-side.
PDF File
Click or drag & drop a PDF file
About Our Free PDF Compressor
Our PDF Compressor optimizes PDF file structure and removes unnecessary metadata — entirely in your browser. No files are uploaded to any server, ensuring complete privacy.
How It Works
- Metadata Removal: Strips title, author, subject, keywords, producer, and creator information
- Object Stream Optimization: Uses efficient object streams to reduce internal structure overhead
- 100% Client-Side: All processing happens in your browser — your PDFs never leave your device
- No Watermarks: Clean output without any branding or modifications to content
Limitations
Client-side compression focuses on structural optimization and metadata removal. For advanced compression like image downsampling or font subsetting, dedicated desktop tools such as Ghostscript or Adobe Acrobat may achieve better results. The compression ratio depends heavily on how the original PDF was created.
Frequently Asked Questions
Is PDF compression free?▾
Yes, completely free with no file limits or watermarks.
How much can the file size be reduced?▾
Typically 20-70% depending on the content. PDFs with large images see the biggest reductions.
Does compression affect quality?▾
Our tool optimizes without visible quality loss. Text and vector graphics remain sharp.
Is my PDF uploaded to a server?▾
No. All compression happens in your browser using JavaScript. Your files stay on your device.