Compress PDF to 300 KB

Reduce your PDF below 300 KB online — free, no signup, 100% in your browser. The target is preset to 300 KB, so just drop your file and download.

📁 Drop a PDF here, or click to choose — target 300 KB

Best for scanned or image-heavy PDFs. The target is preset to 300 KB.

Get your PDF under 300 KB for any form

Exam, bank and job portals cap how large an uploaded PDF can be, and a 300 KB limit is a common one. A scanned document or an image-heavy PDF from your phone is usually far bigger, so the form rejects it. This page presets the compressor to 300 KB and shrinks your file to fit, keeping the pages as clear as possible.

It works best on scanned and photo-based PDFs (the kind portals reject). Need a different limit or a general compressor? Use Compress PDF, and for the rest of your application try our full PDF toolkit. Your file never leaves your device.

⚠️ Upload limits vary between portals — always confirm the exact maximum size in the official instructions.

Frequently asked questions

How do I compress a PDF to 300 KB?
Upload your PDF above — the target is preset to 300 KB. The tool rasterises the pages and lowers the quality just enough to bring the file at or under 300 KB, then lets you download it. Everything runs in your browser; nothing is uploaded.
Why won't my PDF upload to the exam/bank portal?
Most portals cap the PDF size — often 300 KB or a similar limit — and a scanned or image-heavy PDF is usually far larger. Compressing it below 300 KB lets the form accept it.
Will the text still be readable after compression?
Yes — the tool keeps the highest quality that fits under 300 KB, so the pages stay legible. Very small targets on a heavy scan will look softer; scanning in greyscale first helps a lot.
Is it free and private?
Completely free with no sign-up or watermark, and the PDF is processed entirely on your device — it is never uploaded to a server.

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