⚡
Compress PDF Without Losing Quality
Reduce file size by up to 80% — free, instant and private
A PDF that is too large to email, too slow to upload or rejected by a file size limit is a productivity killer. Compressing your PDF solves all of these problems in seconds — and your content stays sharp and readable.
Why are some PDFs so large?
🖼️
High res images
Most common cause of large PDFs
🔤
Embedded fonts
Fonts stored inside the file add size
📄
Scanned pages
Saved at high DPI setting
📊
Hidden metadata
Extra data stored inside the file
How much smaller will my file get?
📝
Text-heavy documents
Typically 10 to 30 percent smaller
Typically 10 to 30 percent smaller
10-30%
🖼️
Documents with images
Typically 40 to 70 percent smaller
Typically 40 to 70 percent smaller
40-70%
📠
Scanned PDFs
Typically 50 to 80 percent smaller
Typically 50 to 80 percent smaller
50-80%
How to compress a PDF using CuroPDF
1
Go to curopdf.com/compress-pdf
Open the free compress tool — no account needed
Open the free compress tool — no account needed
2
Upload your PDF
Click or drag and drop your file
Click or drag and drop your file
3
Click Compress PDF
The tool processes your file instantly in your browser
The tool processes your file instantly in your browser
4
Download your smaller file
Your compressed PDF downloads automatically
Your compressed PDF downloads automatically
When to compress a PDF
📧 Before emailing
Most email services limit attachments to 25MB
Most email services limit attachments to 25MB
📤 Before uploading
Many forms and portals have strict size limits
Many forms and portals have strict size limits
💬 For messaging apps
WhatsApp and Telegram have file size limits
WhatsApp and Telegram have file size limits
📱 For mobile storage
Save space on devices with limited storage
Save space on devices with limited storage
💡 Tips for best results
- For scanned documents try scanning at a slightly lower DPI before compressing
- If you need to reduce further split the document into sections first
- Text quality is never affected — only images are optimised
Frequently asked questions
Will compression affect text quality?
No. Text in PDFs is stored as vectors and is never affected by compression.
Is there a file size limit?
No. You can compress PDFs of any size with CuroPDF completely free.
Are my files safe?
Yes. Everything happens in your browser. Your files never leave your device.
Ready to compress your PDF?
Reduce your file size for free — no account needed
⚡ Compress PDF Free →