Compress PDF to 150 KB
Upload your document, then get 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 150 KB
Follow these steps to reduce your document and save the finished file.
- 1.🚀
Upload your PDF
Choose the PDF you want to reduce from your device.
- 2.⚡
Choose a level
Check the estimated size for each level and pick the one that gets under 150 KB.
- 3.✅
Download your PDF
Save the smaller PDF to your device and use it wherever you need it.
More PDF tools you might need
A fast way to compress PDF to 150 KB
See the size first
Each level shows an estimated file size before you compress, so you can keep applications and assignments within 150 KB attachment limits.
Keep your PDF easy to read
Keep text, images, formatting, and page layouts clear so recipients can read and review the finished PDF.
Fast online processing
Most files are compressed in under 30 seconds, even when they are packed with images.
No software setup
You can compress PDF to 150 KB online free of charge, right in your browser. There is no desktop software to install and no account to create.
Works across devices
Use our online tool in common desktop and mobile browsers to compress a PDF file on your preferred device.
Simple file handling
Clear controls guide you through uploading your file and saving the result.
Frequently asked questions
Will the text stay easy to read at 150 KB?
In most cases, yes. Text takes up very little space, so it usually stays sharp at every level, while images are what compression reduces the most. A text-based PDF often gets under 150 KB at Low or Medium. If you have to use High, check any small or faint text before you send the file.
Will the small print on a form survive at 150 KB?
Usually, yes. Small print is text, and text holds up much better than images. A form that is mostly text can often reach 150 KB at Low or Medium, so you can compress PDF to 150 KB without losing quality. If the form is a scan, small print may blur at High, so check it before you submit.
Will a page full of photos miss 150 KB?
It might. Photos hold far more data than text, and 150 KB leaves little room for them. Choose High, which gives the smallest result, and check the estimate. If a page full of photos still misses 150 KB, keep fewer photos in the document or remove pages you don't need.
How do I check whether my PDF is 150 KB?
Before you compress, each level shows an estimated final size, so you can see which one gets under 150 KB. After you download the file, check its exact size in the file details: Get Info on a Mac, Properties on Windows, or the file info screen on your phone.
Can I compress a PDF to 150 KB on a phone or computer?
Yes. PDFFly works in any modern browser on Windows, Mac, Linux, Android, and iPhone. Upload the PDF, choose a level, and download the result. There is nothing to install and no account to create, so you can compress a PDF to 150 KB on whichever device you have at hand.
Compress PDF to 150 KB free of charge
Upload your file and download a compact copy sized for easier sharing and form submissions.