Compress PDF Online — Reduce File Size by Up to 30-70%
Compress PDF files online instantly. Reduce .pdf file size by 30-70% with no quality loss. Batch compress 100+ files. No signup, no watermarks.
Batch Settings
About PDF Compression
PDF files often contain high-resolution images, embedded fonts, and duplicated resources that inflate file size far beyond what's necessary for screen viewing or email sharing.
CocoConvert's PDF compressor optimises embedded images to a target DPI (150 DPI for web/email, 72 DPI for maximum compression), removes unused font subsets, strips metadata, and applies stream compression to internal objects.
For scanned PDFs, the image compression alone can reduce a 20 MB document to 2 MB. For text-heavy PDFs with embedded photos, expect 30-70% reduction.
All text, formatting, hyperlinks, and interactive elements are fully preserved. The compressed PDF is functionally identical to the original — just smaller.
How to Compress PDF
- 1
Upload your PDF file
Drag and drop your .pdf file into the upload area, or click to browse. Batch upload is supported.
- 2
Adjust compression settings
Use the quality slider to control the compression level. Lower values produce smaller files.
- 3
Click "Compress"
CocoConvert compresses your PDF file using optimised document encoding.
- 4
Download the compressed PDF
Your smaller .pdf file is ready. Typical reduction: 30-70%.
Compression Tips
.pdf file • Document
Reduce embedded image quality to 150 DPI for web/email. 72 DPI for maximum compression.
| Extension | |
| MIME Type | application/pdf |
| Category | Document |
Frequently Asked Questions
What are the limits for PDF compression?
CocoConvert lets you compress PDF files with no signup required. You get 5 files per hour (up to 250 MB each) on the starter tier. Pro users get 100 files per hour and 5 GB per file.
How much can I reduce PDF file size?
Typical PDF compression reduces file size by 30-70%, depending on the original file and quality settings. Tip: 150 DPI for web/email, 72 DPI for max compression, 300 DPI for print.
Does compression affect PDF quality?
CocoConvert gives you full control over the quality-size trade-off. Higher quality settings preserve more detail; lower settings produce smaller files. For lossless formats, compression is always bit-for-bit identical.
Is my PDF file secure?
Absolutely. Files are processed on isolated servers in Germany, encrypted in transit via TLS, never analysed or shared, and permanently deleted within 24 hours.
Can I batch compress multiple PDF files?
Yes! You can compress up to 5 files per hour on the starter tier. Pro users get 100 files, Business API users get 200. All files are processed in parallel.