Compress PDF to 20 KB
Upload your document, then receive a smaller file ready for sharing.
Supports PDF
Size up to 100 MB
Supports PDF
Size up to 100 MB
How to compress PDF to 20 KB
Upload your document, pick a compression level, and save the smaller result.
- 1.🚀
Upload your PDF
Choose the PDF you want to compress from your device and upload it.
- 2.⚡
Choose a level
Check the estimated size for each level. For 20 KB, High is usually the one to pick.
- 3.✅
Download your file
Save the compressed copy to your device and check that it meets your upload limit.
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The easy way to compress PDF to 20 KB
See the size first
Each level shows an estimated file size before you compress, which helps when an application form or government portal enforces a strict 20 KB cap.
Clear document quality
Reduce PDF file size for strict upload limits, then check that the compressed file keeps its text, images, charts, and signatures clear enough to use.
Fast online processing
Most files are compressed in under 30 seconds, so you can meet a portal's limit right before a deadline.
Works across devices
Use our online PDF compressor in a modern browser on your computer, phone, or tablet.
No installation needed
Open PDFFly in your browser and compress PDF to 20 KB free of charge, with nothing to install and no account to create.
Simple file handling
Clear controls guide you from upload to download, so even first-time users can prepare a 20 KB file in a few clicks.
Frequently asked questions
Will compressing a PDF to 20 KB affect quality?
Often, yes. 20 KB is very little space, so images usually lose detail and may look blurry at High, while plain text holds up better. A short, text-only PDF is the kind of file where you can compress PDF to 20 KB without losing quality, so check the result before you submit it.
Why is the file still over 20 KB?
Usually because of images, scans, or embedded fonts, which can need more than 20 KB even after strong compression. Choose High and check the estimate. If the file is still over, compress the result again at High, remove pages you don't need, or split the PDF into smaller parts.
Will a page with a photo miss 20 KB?
Most likely. A single photo usually needs far more than 20 KB, even after strong compression. You can choose High and check the estimate, but expect a visible loss of detail. If you can, use a smaller or simpler image in the document, or send the photo as a separate file.
Why would I need a 20 KB PDF?
Mostly for strict upload forms. Some job, exam, and government portals cap certain uploads at 20 KB, typically signatures, small ID scans, or one-page declarations. If you need to compress PDF to 20 KB online for one of these forms, keep it to a single page with little or no imagery.
Will a logo by itself be too big for 20 KB?
Not usually. A simple logo with few colors takes little space, so a page with just a logo and some text often fits in 20 KB. Detailed logos with gradients or photo effects need more room. Check the estimate at Low or Medium first, and switch to High only if the file is still over.
Can I use this PDF compressor on my phone?
Yes. PDFFly works in your phone's browser on Android and iPhone. Upload the PDF, choose a level, and download the result straight to your phone. There is nothing to install, so you can prepare the file and submit it from the same device.
Compress PDF to 20 KB online free of charge
Upload one document and reduce its size online. Download a copy that fits strict upload limits.