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Getting a PDF under 150 KB
Registration and scholarship portals often allow 150 KB per document: an ID proof, a caste or income certificate, a fee receipt. Two or three scanned pages usually fit with the text still easy to read.
We run a lossless cleanup first, then step the page images down in resolution and JPEG quality together until the file is under 150,000 bytes. We stop at the first step that fits, so nothing is squeezed harder than it needs to be.
Tips
- Front and back of an ID card fit comfortably on one page. Put them side by side before scanning.
- Check stamps, seals and signatures in the result. Fine, faint marks are the first thing to blur.
- If the portal asks for a PDF but you have a photo, convert it to PDF first, then compress it here.
Questions
Why is my result well under 150 KB instead of right at it?
There are 12 fixed settings, and each one lowers resolution and JPEG quality together by a noticeable step, for example from 150 dpi at quality 70 to 125 dpi at quality 65. We keep the gentlest setting under 150,000 bytes, so the file can land some way below the limit rather than exactly on it.
How much room does each scanned page get in a 150 KB PDF?
Three scanned pages share 150,000 bytes, about 50,000 each. A fourth page cuts every share to 37,500 bytes, and since one setting covers all pages, all four get blurrier together. An ID card's front and back placed on a single page gets the whole 150,000 bytes.
Does a fee receipt downloaded as a PDF need compressing to reach 150 KB?
A receipt generated by a website is mostly text and is often small already. If it is under 150,000 bytes, you get the same file back unchanged. If not, the lossless pass runs first, and image settings are only tried when that is not enough.