Make your PDFs smaller. Compress files to 300 KB in seconds!
Compress PDF to 300 KB without losing quality. Smallpdf’s online tool reduces size in seconds—free, secure, and works on any device or browser.
Working with large PDF files can be frustrating. They're difficult to share, slow to upload, and often take up unnecessary storage space. If you're sending an oversized PDF to a coworker (or receiving one of these files), you should know there are ways to compress a PDF to 300 KB and even smaller sizes with our free online tool.
How to Compress a PDF to 300 KB or Less
You can quickly reduce the file size of your PDFs using our Compress PDF tool. Below are some simple steps to get it right: 1. Go to the Smallpdf Compress PDF tool. 2. Drag and drop your PDF file into the upload area or click “Choose Files” to select a document from your device. 3. Choose from “Basic” or “Strong” compression. (You'll need Smallpdf Pro to take advantage of the latter option). 4. Wait for our tool to reduce your file's size. 5. Click “Download” to save your PDF document.
If your file is still over 300 KB after compression, try Strong compression or check out our troubleshooting tips below!
Easiest method to compress a PDF to 300 KB or less
Basic vs. Strong Compression for 300 KB PDFs
Smallpdf's Basic compression mode can shrink PDF file size while keeping your document's contents nearly identical to the original. That should be more than enough for most use cases.
If your original file is particularly large, this function might not be able to get your PDF's size below 300 KB.
In these cases, you can always try Smallpdf's Strong compression option. Basic compression maintains near-original quality, while Strong compression may show visible changes in images but achieves smaller file sizes.
Strong compression isn't available to our free users—it's accessible to people with a Smallpdf Pro subscription. But that doesn't mean you have to spend money to give
Strong compression a try. Thanks to our 7-day free trial of Smallpdf Pro, you can try this feature out at no added cost.
To start a Smallpdf Pro trial from inside our compression tool, upload your file and choose “Strong” compression. When you do, you'll get a prompt to sign up.
If Your PDF Won't Reach 300 KB: Quick Fixes That Work
Sometimes even our Strong compression can't get your PDF down to 300 KB. Don't worry—here are some quick fixes that usually do the trick:
- Remove unnecessary pages: Use our Delete PDF Pages tool to keep only the pages you need
- Reduce image quality: High-resolution images are often the biggest culprits in large file sizes
- Convert to grayscale: Color images take up more space than black and white
- Remove embedded fonts: These can add significant bulk to your PDF
- Flatten form fields: Interactive elements increase file size
If you're still struggling to hit that 300 KB target, try splitting your PDF into smaller documents. Sometimes two 200 KB files work better than one 400 KB file!
Compress a PDF to 300 KB on Any Device
You can compress a PDF to 300 KB on our website through any internet browser or operating system.
Whether you're using a desktop computer or a mobile device to work on your PDF files, Compress PDF can help.
To use our file compressor, all you need is an internet connection and the file you want to compress. Additionally, our iOS and Android apps are perfect for getting your work done on the go.
Get Started with Free PDF Compression
Ready to compress your PDFs to 300 KB or less? Start compressing now with our free online tool—no registration required. Want access to Strong compression and batch processing? Start your free trial of Smallpdf Pro today!
FAQs: Compress PDF to 300 KB
How Do I Compress a PDF to Exactly 300 KB?
PDF compression doesn't allow for exact file size targeting, but our Strong compression mode gets most files very close to your desired size.
Why Is My PDF Still Over 300 KB After Compression?
Large PDFs often have high-resolution images or embedded fonts that resist compression—try our troubleshooting tips above for better results.
Can I Compress Multiple PDFs to 300 KB at Once?
Yes! Batch compression is available with Smallpdf Pro, letting you compress multiple files simultaneously.
Does Compressing to 300 KB Reduce Quality?
Basic compression maintains near-original quality, while Strong compression may show minor visual changes in exchange for smaller file sizes.
