Compress PDF to 300 KB
A roomier limit for multi-page scans and application uploads. The compressor below is pre-set to a 300 KB target.
300 KB is the limit many job, university, and visa application systems use when they expect multi-page scanned documents — passports, transcripts, certificates — where a harsher 100 KB cap would blur the fine print. The extra headroom lets the compressor keep higher image resolution while still producing a portal-friendly file. The tool below is pre-set to a 300 KB target, runs an automatic quality search, and shows the final size before you download. It is the right choice when legibility of scanned text matters and your form allows up to 300 KB.
Secure
HTTPS transport. Files removed after processing.
High quality
Resilient open-source engine pipeline.
Fast & easy
Drop, process, download — in seconds.
How to compress pdf to 300 kb
- 1
Upload your PDF
Drop your scanned or image-heavy PDF — the 300 KB target is preselected.
- 2
Automatic compression
The tool finds the highest quality that still fits under 300 KB.
- 3
Confirm size
Check the output size in the success panel.
- 4
Download
Save the compressed PDF for your application.
Built for speed, privacy, and zero friction
- Pre-set to a 300 KB target
- Keeps scanned text sharper than tighter limits
- Built for multi-page application documents
- No signup, no watermark, no daily limit
- Secure HTTPS processing; files deleted after download
Frequently asked questions
When should I use 300 KB instead of 100 or 200 KB?
Use 300 KB when your form allows it and your document is a multi-page scan where readability matters. The larger ceiling preserves more resolution, so small print on certificates and transcripts stays legible.
Will a 300 KB PDF upload to most portals?
Yes, as long as the portal’s stated limit is 300 KB or higher. Always check the form’s maximum first — if it caps at 200 KB, use the 200 KB target instead.
Does compressing to 300 KB reduce the page count or quality of text?
No. Compression never removes pages, and text remains vector-sharp. Only embedded images are recompressed, and at 300 KB they retain good detail.
Is there a file-size limit on the upload?
You can upload PDFs up to 100 MB. Large originals simply take a little longer to compress.
The 300 KB target is the one to reach for when your document is a stack of scans and the form is willing to accept a slightly larger file. Below roughly 200 KB, multi-page colour scans start to lose the crispness of small text; 300 KB gives the engine enough budget to keep resolution high while still landing well within typical portal limits. As with every target-size run, the tool measures each compression pass and stops as soon as it is under your ceiling, so you never over-compress. If your portal is stricter, drop to the 200 KB or 100 KB targets; if it is generous, the 500 KB target preserves near-original image quality. For documents that are mostly text, you will often be far under 300 KB already.
Need the full Compress PDF tool?
Open Compress PDF with every option available — quality levels, exact target sizes, and more.
Open Compress PDF