How to Reduce PDF Size to Under 100KB
Why Under 100KB?
Many job application portals, government websites, and university submission systems cap PDF uploads at 100KB, 200KB, or 500KB. Your scanned resume or document often exceeds 2-5 MB. Getting under 100KB requires aggressive optimization, but it's possible while keeping text readable.
Use a PDF Compressor
Upload your PDF to CocoConvert's compressor and select the maximum compression level. The compressor reduces embedded image quality, strips unnecessary metadata, removes duplicate fonts, and optimizes the PDF structure. For text-heavy PDFs, this alone often gets you under 100KB.
If It's Still Too Large
Convert the PDF to grayscale — color data takes significant space. Reduce image DPI to 100-150 (enough for screen reading). If the PDF contains large images, consider extracting the text and recreating the document. For scanned documents, re-scanning at 200 DPI in grayscale produces much smaller files than 300 DPI color scans.
The Nuclear Option
If nothing else works, convert the PDF to a Word document, copy the text content into a new document with minimal formatting, and export back to PDF. A text-only PDF with basic formatting weighs 20-50KB for a typical resume. You lose custom design elements but meet the size requirement.
Specific Size Targets
100KB target: achievable for 1-2 page text documents with a small logo. 200KB target: reasonable for documents with a few images. 500KB target: comfortable for most standard documents. 1MB target: easy for almost any document. The key is matching image quality to the actual viewing size — nobody zooms into a resume at 300% magnification.