Free Online Compress PDF
Reduce the size of your PDF files by choosing between three compression levels: low (10-30% smaller, maximum quality), medium (30-60%) or high (60-80%, ideal for email attachments). Processing runs in your browser, so the original file is never uploaded to a server. It works best on text-heavy PDFs and scans with moderate images; PDFs with very heavy images may see a smaller reduction.
💡 Advantages of using Compress PDF
- • 3 compression levels: low, medium and high, depending on what you need
- • The file is processed in your browser, not uploaded to a server
- • Shows original size, final size and the real percentage saved
- • Great for shrinking PDFs before sending them by email
- • No usage limit and no watermark
📦 Compress PDF
Reduce the size of your PDF files while maintaining quality
📦 Compress PDF
Reduce the size of your PDF files while maintaining quality
Drag a PDF file here
Or click to select file
💡 Consejos:
- • Files with many images compress better
- • Low compression maintains better quality for printing
- • High compression is ideal for sharing via email
- • The process is safe - your original file is not modified
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⚡ Cómo usar en 3 pasos
- 1
Upload your PDF file
Drag and drop or select the PDF you want to shrink.
- 2
Choose a compression level
Select low, medium or high depending on how much size you need to reduce.
- 3
Compress and download
Generate the compressed PDF and download it; you'll see the real reduction percentage achieved.
Frequently Asked Questions about Compress PDF
How much does this tool reduce file size?▼
It depends on the level chosen: low is 10-30%, medium 30-60% and high 60-80%, along with the PDF's content type (documents with more text and lighter images compress better).
Is my PDF uploaded to a server to compress it?▼
No, compression happens directly in your browser. The file is never sent to an external server.
Which compression level should I choose?▼
Use 'low' if you need to keep maximum visual quality, 'medium' for a good balance between size and quality, and 'high' when what matters most is the smallest possible file, for example to attach it to an email.
Why is the reduction smaller than expected on some PDFs?▼
If the PDF is already optimized or mostly contains high-resolution images, the reduction can be smaller because the tool optimizes the document's internal structure without aggressively recompressing those images.
Is Compress PDF free?▼
Yes, Compress PDF from WebTools is 100% free. No registration or subscription required. You can use it as many times as you need at no cost.
Is it safe to use Compress PDF online?▼
Yes, all information is processed directly in your browser. We do not store or send your data to any external server.
Does Compress PDF work on mobile?▼
Yes, the tool is fully responsive and works on any device: phone, tablet or computer with a modern browser.