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Compress PDF to 100 KB

Get a PDF under 100 KB for an upload form, with text kept selectable where possible. Set to 100 KB already; runs in your browser, nothing uploaded.

Private · on device. Runs in your browser: your file is not uploaded. No sign-up.

One PDF, any size

Getting a scan under 100 KB

100 KB is tight for scanned documents, and the scan itself decides most of the outcome. Before compressing:

  1. Scan or photograph only the page the form asks for, not the whole booklet.
  2. Use greyscale (black and white) unless colour matters, such as a coloured stamp the portal checks.
  3. 150 DPI is plenty for a certificate; 300 DPI or more only makes the file bigger.
  4. Crop away the table or bed around the paper if you photographed it with a phone.

Rough sizes to expect

DocumentFits in 100 KB?
Typed letter or form, 1–5 pagesUsually, with the text kept selectable
One scanned certificateYes, re-rendered at about 150 DPI, greyscale if needed
Scanned mark sheets, 2–3 pagesOften, in greyscale
A 10-page scanned documentNot readably: split it or ask whether a larger limit applies

Need a bit more room? The 200 KB page is the same tool with a larger target, and the main PDF compressor takes any size.

Frequently asked questions

Can any PDF be made smaller than 100 KB?

Most one- or two-page documents can. A typed document (exported from Word or a website) is usually well under 100 KB already, unless it carries photos. A scanned page is the hard case: one A4 page scanned in colour at 300 DPI is a picture of about 8.7 million pixels, and squeezing that into 100 KB means re-rendering it at a lower resolution and in greyscale. Scans of more than three or four pages rarely fit in 100 KB while staying readable.

Why do forms set such a small limit?

Recruitment and scholarship portals receive lakhs of applications, each with several certificates, so they keep every upload small. A 100 KB limit is common for single documents such as a caste, income or domicile certificate, a class 10 mark sheet or an NOC.

Will my document still be readable at 100 KB?

For a one-page certificate, yes: a page rendered at about 150 DPI in greyscale is perfectly readable on screen and in print. The result is shown before you download it, so you can zoom in and check that stamps, signatures and small print are still clear.

It says it could not get under 100 KB. What can I do?

Turn off "Keep my text selectable" so pages can be re-rendered as images, and turn on greyscale. If it still does not fit, the document has too many pages for the limit: upload only the page the form asks for (use Split PDF to extract it), or crop away the blank margins of a scan before compressing.

Is 100 KB counted as 100,000 or 102,400 bytes?

Portals differ, so the tool aims for at most 100,000 bytes, which passes either way. The exact byte count is shown with the result.

Requirements this tool handles