Skip to content
GivenTool

Compress a PDF to 100 KB

Shrink a scanned PDF to 100 KB or less for an upload form. Image-based output: text will not be selectable.

Loading tool…

A 100 KB limit is common on older government and exam portals and on some job application systems, which often ask for scanned certificates, ID proofs and signatures as separate small PDFs. Choose your PDF and the tool rebuilds it at the best quality that fits under 100 KB.

How it works, honestly: each page is rendered to an image and the PDF is rebuilt from those images. That is what allows large reductions without uploading anything, but the text in the result can no longer be selected, searched or copied, and links and form fields are removed. It is the right choice for scanned documents and for uploads to portals with a size limit; keep the original for everything else.

Be realistic about page count: 100 KB is a small budget, and every extra page lowers the resolution each page can have. For multi-page documents, check whether the portal allows one file per document, then split the PDF or remove pages you do not need before compressing. Turn on black and white for text scans; it often halves the size.

How to use it

  1. Choose the PDF; the target is already set to 100 KB.
  2. Turn on black and white for scans of printed text.
  3. Click Compress PDF and check the size and the resolution reported.
  4. Open the result and zoom in on the smallest print before you upload.

Frequently asked questions

Are my files uploaded?

No. The file is read and processed by your browser on your device; nothing is sent to a server. You can load the page, switch off Wi-Fi and it still works.

Why is the text no longer selectable?

Browsers cannot re-encode the fonts and vector graphics inside a PDF, so the only way to shrink any PDF on your device is to turn each page into a compressed image. The pages look the same, but they are pictures. For a scan this changes nothing, because it was already pictures.

What if the result is larger than my file?

Text-only PDFs made by Word or a web browser are often already tiny, and turning them into images can make them bigger. The tool tells you when that happens; keep the original.

My PDF did not get under 100 KB. What now?

The tool stops lowering the resolution before pages become unreadable. Remove pages that are not required, split the document into separate uploads, or rescan at 150 dpi in black and white.

Is 100 KB the same as 0.1 MB?

Roughly. Here 1 KB is 1,024 bytes, so 100 KB is 102,400 bytes. A portal that counts 1 KB as 1,000 bytes allows only 100,000 bytes; to be safe there, use the main PDF compressor with a target of 95 KB.

Related tools