A 150KB ceiling is common for email attachments on slow connections and for document uploads in many South Asian job and admission portals. Our free tool compresses your PDF toward 150KB automatically, in your browser, with no signup and no file ever leaving your device.
It iteratively lowers page render quality and rebuilds the document until the target is met, then reports the exact final size. Two-to-four-page documents with mixed text and images are the sweet spot for this target.
If the file will not fit, the tool says so plainly and gives you the smallest version it managed — you can then split the PDF into parts and compress each one.
Compress PDF to 150KB
Shrink a PDF down to approximately 150KB.
Drop your file(s) here or click to browse
Your files never leave this browser — everything is processed locally on your device.
The tool keeps lowering quality until the file fits in about 150KB. Text-heavy PDFs compress best; scanned pages may not reach very small targets.
How to compress a PDF to 150KB
- Drop your PDF into the box above.
- Click “Compress to 150KB”.
- Let the tool iterate through quality levels.
- Download the result and confirm the size and readability.
FAQs
How long does it take?
Usually 10–30 seconds for a few pages. Large scanned documents take longer because every page must be re-rendered several times.
Can I compress a 50-page PDF to 150KB?
Unlikely while staying readable — that is about 3KB per page. Split it into smaller parts first.
Is the compressed file still a real PDF?
Yes. It opens in every PDF reader; only the internal page images are more compressed.