Compress PDF to 100 KB: Squeeze a one-page scan or form under 100 KB. Input: PDF, image files and values you enter. Output: Results shown on the page and a downloaded file. Privacy: Runs in your browser: inputs and files stay on your device and are not uploaded.
How to compress a PDF to 100 KB
- Drop your PDF, or several PDFs and photos of documents, on the box. They are combined into one file in the order you add them.
- The target is already set to 100 KB. Tick Black and white if colour is not needed.
- Press Compress to target. The tool picks the best quality that still fits and shows a before and after preview.
- Check that the text is readable, then download.
What fits in 100 KB
A 100 KB limit leaves room for about one scanned page at a readable resolution, or a few pages of plain text kept as text. Black and white can help here. If the target cannot be reached without making text unreadable, the tool tells you and offers the smallest readable version.
The limit is counted in decimal units (1 KB = 1,000 bytes, 1 MB = 1,000,000 bytes), so the file is accepted whichever way a website counts. Everything runs in your browser; nothing is uploaded.
FAQ
Where would I need a PDF under 100 KB?
On strict application portals that give each supporting document, such as a certificate or proof of address, its own small upload box. The limit is normally printed next to the box or in the instructions for the form, so check it there, along with any minimum size.
Is 100 KB enough for a readable page?
For one page, yes, in black and white. 100 KB is very little room for colour or several pages: tick Black and white, keep only the page that is asked for, and crop the scan to the document edges.
What if the tool says 100 KB cannot be reached?
It then offers the smallest version that is still readable. Splitting the document, removing pages or rescanning with better light (a cleaner white background compresses better) usually closes the gap.
Is 100 KB counted as 100,000 or 102,400 bytes?
The tool aims for 100,000 bytes, the smaller of the two, so the file passes whichever way the website counts.