Compress a PDF to 300 KB — and stay inside a size range
Some application forms do not give a single limit but a range, such as “PDF between 50 KB and 300 KB” for a category or disability certificate. Others simply cap supporting documents at 300 KB. Either way you want the file just under the maximum — sharp, readable, and comfortably above any minimum.
That is exactly how this compress PDF to 300 KB tool behaves. It does not shrink the file as far as possible; it searches for the highest resolution and JPEG quality whose saved size is still at or below 300,000 bytes, after first trying a lossless optimisation. All processing stays in your browser.
How to compress a PDF to 300 KB
- Choose the PDF you need to upload.
- “300 KB” is preselected; turn on Grayscale only if colour does not matter.
- Press “Compress to 300 KB”.
- Check that the result is inside your form’s range, look over the preview and download.
Compress PDF to 300 KB features
Lands near the top of the range
Results typically end up a few kilobytes under 300 KB, far from a 50 KB minimum.
Room for colour
With 300 KB, one- to three-page documents can usually keep colour seals, photos and signatures.
Exact numbers
The report shows the size in bytes so you can compare it with the range in the instructions.
Working with minimum and maximum sizes
If your PDF is already under 300 KB the tool leaves it unchanged. If it is also under the form’s minimum, compressing will not help — rescan the document at 150–200 DPI or in colour to make it larger, then come back only if it ends up above 300 KB.
300 KB is 2.4 million bits. Three pages get 100 KB each, which is plenty for colour scans; six pages get 50 KB each, still clear in grayscale.
Tips for 300 KB uploads
- Keep one document per file unless the form asks you to combine them.
- Scan straight and flat; skewed phone photos waste space on dark edges.
- Remove pages that are not requested with Delete PDF Pages.
- Different limit? See 200 KB or 500 KB, or set any size on Compress PDF to a Target Size.
Compress PDF to 300 KB FAQ
How do I make a PDF between 50 KB and 300 KB?
Compress it here with the 300 KB target. The tool aims just under 300,000 bytes, so the result is far above 50 KB unless the original was already tiny — in which case it is kept as it is.
How many pages fit in 300 KB?
As a rule of thumb, divide 300 KB by the page count: 3 pages get 100 KB each, 6 pages 50 KB, 12 pages 25 KB. Clean typed pages need far less than photos or coloured backgrounds.
Will the compressed PDF open on the portal?
Yes. It is a standard, unencrypted PDF that opens in browsers and every PDF reader.
Is anything uploaded to Galaxy of Tools?
No. The file is read and compressed by your own browser and never sent to a server.