How to compress a PDF to 100 KB or 200 KB for an online form
Job, scholarship, passport and admission portals often accept only small files: 50 KB, 100 KB, 200 KB or 1 MB. Here is how to get under the limit and keep the document readable.
Why your PDF is too big
Most PDFs are big because of pictures, not text. A scanned certificate or a page photographed with a phone is stored as a large, detailed image. One phone photo can be 3 to 5 MB on its own, while a page of typed text is usually only a few KB.
So the trick is to make the pictures smaller while keeping the words readable.
Steps
- Open PDF or photo under X KB.
- Pick the limit the portal asks for: 50 KB, 100 KB, 200 KB, 1 MB, or type your own number.
- Drop your PDF, Word file or photos.
- Download the file. Its size is shown, and it is under your limit.
- Open the downloaded file once and zoom in to check that names, numbers and seals can still be read.
PatraPDF first tries to keep text sharp and only shrinks the pictures. Pages are turned into pictures only if that is the only way to reach the limit.
If it still does not fit
- Too many pages for the limit. 10 scanned pages in 100 KB is very hard to read. Check whether the portal really wants every page, or whether it allows more than one upload.
- Scan again at a lower setting. If you are scanning, choose 150 or 200 DPI and "grayscale" (black and white) instead of colour. The file starts much smaller and stays clearer after compression.
- Crop the edges. Large empty margins and the table around the paper in a phone photo still take space. Crop to the paper first.
- Use a photo instead of a PDF, if the portal accepts JPG. One page as a JPG is often smaller than the same page as a PDF.
Common size limits
| What the portal asks | What it usually means |
|---|---|
| Under 50 KB | One page, black and white |
| Under 100 KB | One or two clear pages |
| Under 200 KB | A few pages, or one colour page |
| Under 1 MB | Most documents with several pages |
Questions
Will the text become blurry?
Typed text stays sharp in most cases, because PatraPDF shrinks pictures first. Very low limits for many scanned pages can make small print hard to read, so always open the result and check.
Is 1 MB the same as 1000 KB?
Portals differ: some count 1 MB as 1000 KB and some as 1024 KB. If you are close to the limit, aim a little lower, for example 950 KB for a 1 MB limit.
Does it work on a phone?
Yes. Open patrapdf.in/compress-pdf-to-kb in your phone's browser, pick the limit and choose the file.