Compress PDF - Reduce PDF File Size
Reduce PDF file size for email attachments and web upload limits.
Processed 100% locally in your browser. Your files never leave your device.
About Compress PDF - Reduce PDF File Size
Optimizes stream structures and embedded image resolution within PDF files to shrink document size.
What Can You Use This Tool For?
Students, legal professionals, administrative teams, and business owners use Compress PDF File to quickly manage, convert, and optimize sensitive PDF contracts, assignments, and reports with guaranteed local browser privacy.
How to Compress PDF File Size
1. Upload or drag & drop your PDF file.
2. Choose compression preset: Extreme, Recommended, or High Quality.
3. Click "Compress PDF" to reduce document size.
4. Download your optimized, smaller PDF file.
Usage Examples
Compressing Large Document for Email
Original Size: 18.5 MB Compression Level: Recommended New Size: 3.2 MB (82% size reduction)
Frequently Asked Questions
Are my PDF documents uploaded to a remote server?
No. Unlike traditional PDF conversion sites, Numvax processes PDF documents entirely inside your web browser using WebAssembly and client-side JavaScript. Your confidential files never leave your device.
What is the maximum PDF file size supported?
Because processing occurs in your local browser memory, you can manipulate large multi-page PDF documents smoothly without server upload timeout errors.
Will the formatting and fonts of my PDF be preserved?
Yes, the tool utilizes precision document rendering engines to maintain original text layout, font structures, vector graphics, and embedded images.
Can I process password-protected PDF files?
If a PDF requires a password, unlock it using our Unlock PDF tool first before merging, editing, or splitting.
Will compressing a PDF degrade text quality?
Recommended compression optimizes stream data and images while keeping vector text 100% sharp and readable.
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