Compress PDF to 300KB
Reduce your PDF to 300KB or less in one click — ideal for certificates, mark sheets and application uploads. Free, no sign-up, and your file never leaves your device.
Runs in your browser — your data never leaves your deviceDrag & drop a PDF here
One PDF · compressed to under 300KB on your device
How to use Compress PDF to 300KB
- 1
Add your PDF
Drop your PDF into the box or tap to choose it from your phone or computer.
- 2
Keep the 300KB target
The target is already set to 300KB. Change it if your form asks for a different limit.
- 3
Download
We find the best quality that fits under 300KB. Download it and upload it to your form.
Frequently asked questions
How do I compress a PDF to 300KB?
Drop your PDF above and press Compress. We first try a lossless clean-up; if the file is still over 300KB, we lower image quality step by step and keep the best-looking version that is under 300KB.
What if my PDF can't get under 300KB?
Very long PDFs or pages full of photos may not fit. You'll get the smallest version we could make. Try removing pages you don't need with Remove PDF Pages or Split PDF, then compress again.
Will the text still be readable?
Yes — we pick the highest quality that fits. To reach small sizes, pages may be saved as images, so text stays readable but can't be selected or searched in the compressed copy.
Are my documents safe?
Nothing is uploaded. Your files are processed right here in your browser and never leave your device, so we never see them.
Is it free to compress PDF to 300KB?
Yes. There is no sign-up, no watermark and no daily limit.