Compress PDF to 100 KB

How to compress a PDF below 100 KB

1. 1

   Choose a PDF

   Click Choose PDF or drag the file onto the page. It is loaded only in your browser.

2. 2

   Start compression

   The 100 KB target is already set. The tool tries structural rewriting, image reduction, font subsetting and, when needed, page rendering.

3. 3

   Review the result

   You will see the original size, final size and method used. If the target cannot be reached, you receive the smallest verified result.

4. 4

   Download the file

   The result is reopened and checked for page count and retained text before download.

What to expect from a 100 KB limit

The 100 KB value is an upper limit, not an exact requested size. Text-only documents usually compress more easily than colour scans or image-heavy files. If the target cannot be met without unacceptable loss, the tool returns the smallest result that passes verification and can offer a lower-resolution attempt. Review fine print, signatures, stamps and thin lines before sending the file, and keep the original as a backup.

When a 100 KB limit is useful

A 100 KB limit is most likely to be used for small attachments in online forms and record systems. The selected value is an upper limit for the result, not a promise of an exact file size. Before processing, check how the receiving service measures its allowance. This tool uses 1,024 bytes per kilobyte and applies the same binary calculation to megabytes. Read the particular form requirements before you begin.

A short text document may fit, while photographs and scanned pages require considerably more space. Page count is only one factor: embedded fonts, photographs, scans and unused objects all affect the result. A simple document may meet the target without a visible change, while an image-heavy file may require softer detail. After downloading, compare important figures, signatures, stamps and fine lines with the original.

What to do if the PDF stays above 100 KB

The tool compares four approaches and chooses the smallest verified result that meets the target. If none does, it returns the smallest verified file and offers page rendering at a lower resolution between 120 and 72 DPI. That additional step can soften images and fine rules, so open the finished document and inspect it before submitting or sharing it.

If lower resolution is still not enough, reduce the document rather than sacrificing more readability. Use Extract pages from PDF to keep only the required pages, Remove pages from PDF to discard blank or unnecessary material, or Split PDF to create smaller separate files. When the receiving system accepts a larger ceiling, choose the corresponding Compress PDF page instead.

Privacy

All processing takes place in your browser. Your PDF is never uploaded to a server, and no data remains after you close the page.

FAQ