Frequently Asked Questions
Everything you need to know about Free Conversion and PDF compression.
Is this PDF compressor free?
Yes, our PDF compressor is completely free. No hidden fees, no registration required, and no file size limits.
Are my files private?
Yes, your files never leave your browser. All compression happens locally on your device. We never upload or store your files.
How much can I compress my PDF?
Results vary by content. Image-heavy PDFs can be reduced 50-80%. Text-heavy PDFs typically see 10-30% reduction.
Does it work on mobile?
Yes, our compressor works on all devices including iPhone, Android, iPad, and tablets. No app needed.
Will quality be affected?
Low compression preserves maximum quality. Higher levels may slightly reduce image quality but text and vectors remain sharp.
Do I need to install anything?
No. Everything works in your web browser. No software, extensions, or apps required.
Is there a file size limit?
FreeConversion handles large files directly in your browser. The limit depends mainly on your device's memory, but files up to 100MB are processed without issues.
How many files can I compress?
There's no limit! You can use the tool as many times as you want, completely free.
Can I compress multiple PDFs at once?
Currently, you can compress one file at a time. However, the process is very fast and you can compress as many files as you want consecutively.
What's the difference between compression levels?
Low compression (10-30% reduction) preserves maximum quality. Medium (30-50%) offers a good balance. High (50-70%) significantly reduces size with slight image quality loss. Maximum (70-90%) creates the smallest possible file.
Can I use FreeConversion for professional documents?
Absolutely! FreeConversion is perfect for professional documents. Since all processing happens locally in your browser, your confidential documents remain 100% private.
How does PDF compression work?
Our tool uses advanced algorithms to optimize images, remove unnecessary metadata, and reorganize the internal PDF structure for minimal size while preserving visual quality.
Can I compress scanned PDFs?
Yes! Scanned PDFs are often very large and benefit greatly from compression. You can typically reduce their size by 50-80%.
Will the compressed PDF be compatible everywhere?
Yes, compressed PDFs remain in standard PDF format and open in all PDF readers (Adobe Reader, browsers, mobile apps, etc.).
Can I undo compression?
Compression is permanent. We recommend always keeping a copy of your original file before compression, in case you need the uncompressed version.
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