Free Online PDF Compressor - Reduce File Size Instantly
Compress PDF documents efficiently while preserving quality. Our advanced compression algorithm reduces file size by up to 90% without visible quality loss. Perfect for email attachments, web uploads, and storage optimization. Supports all PDF versions and works directly in your browser.
Part of Yoopla's 445+ free browser tools.
How to Use PDF Compressor - Reduce File Size Online | Yoopla
- 1
Upload your PDF document using the drag-and-drop area or click to select files from your device
- 2
Choose compression level: Maximum (smallest size), Balanced (recommended), or High Quality (minimal compression)
- 3
Adjust advanced settings like image quality (DPI) and color mode if needed
- 4
Click the "Compress PDF" button to start the optimization process - processing happens in your browser
- 5
Download the compressed PDF file to your device or save it directly to cloud storage
Frequently Asked Questions
How much can PDF files be compressed?▾
Our PDF compressor can reduce file size by 50-90% depending on the original document. Scanned documents and image-heavy PDFs compress less (50-70%) than text-based PDFs (70-90%). The compression is lossless for text and uses intelligent algorithms for images.
Does compression affect PDF quality?▾
We use intelligent compression that prioritizes text quality while optimizing images. Text remains crisp, searchable, and selectable. Images are compressed using advanced algorithms that minimize visible quality loss. You can preview the result before downloading.
Is there a file size limit for compression?▾
You can compress PDF files up to 100MB in your browser. For larger documents, consider splitting them first using our PDF Splitter tool. All processing happens locally in your browser for maximum privacy and security - no files are uploaded to our servers.
What PDF versions are supported?▾
We support all PDF versions from 1.0 to 2.0. The tool maintains PDF/A compliance for archiving and preserves metadata, bookmarks, and form fields. Compressed files remain fully compatible with Adobe Reader, browsers, and other PDF viewers.
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