How to compress a PDF to 300 KB
- Drop your PDF into the box above or click to choose it.
- Check the maximum size is set to 300 KB (it's already filled in).
- Click Compress and wait a few seconds.
- Check the preview and click Download PDF.
Where is a PDF under 300 KB required?
A 300 KB limit is common on:
- Government, tax and immigration portals.
- University enrolment and visa applications.
- HR, payroll and recruitment platforms.
- Invoices and receipts on expense tools.
At this size most documents with a few pages fit at 100 to 150 dpi, a resolution that still prints well.
Private by design
Most online tools upload your files to their servers. Not here: everything is processed in your own browser and nothing is ever sent anywhere. That's why you can safely use it with your ID, passport, payslips, medical reports or contracts.
Tip
Before scanning, use black and white or greyscale if the document has no photos: it takes less space and reads just as well.
Other sizes
Frequently asked questions
Are my files uploaded to a server?
No. Everything is processed inside your browser. Your files never leave your device.
Is it free?
Yes. No sign-up, no watermark and no usage limits.
How do I get my PDF under 300 KB?
Choose the file, keep 300 KB as the maximum size and click Compress. Lossless compression is tried first; if that's not enough, the best resolution and quality that fit are found.
Will the text still be selectable?
If lossless compression is enough, yes. If the file has to shrink further, pages are turned into images and the text is no longer selectable, although it reads exactly the same.
What if it can't reach the size?
It means the document would become unreadable at that size. Split the PDF into several parts or check whether the form accepts more than one file.
Is 1 MB 1,000 or 1,024 KB?
Here 1 MB = 1,024 KB. Some portals count 1,000. If you're close to the limit, pick a slightly smaller one to be safe.
More tools
- Resize ImageShrink your photos to 20, 50, 100 KB… and set their pixel size.
- ID PhotoCrop your photo for a Spanish DNI, passport or TIE and download it to upload or print.
- Merge PDFCombine several PDFs and photos into one PDF, in any order.
- Convert ImageTurn iPhone HEIC, WEBP or PNG photos into JPG, PNG or WEBP, several at once.
- PDF to JPGTurn every page of a PDF into a JPG or PNG image.
- Split PDFExtract pages, separate them one by one or split a PDF by maximum size.
- Organize PDFRotate, reorder and delete PDF pages without losing quality.
- Sign PDFDraw, type or upload your signature and place it on your PDF, with date and initials.