Compress PDFs to fit a 100KB upload limit — a common cap for government forms, exam portals, and university applications. Browser-side compression via pdf-lib.
100KB is one of the most common PDF size caps for online forms in India and elsewhere. Hitting it reliably depends on what's in your PDF: text-only documents shrink easily, image-heavy documents need image down-sampling. The 100KB target is achievable for most simple documents with a single compression pass.
Choose your PDF. The tool applies pdf-lib's object-stream compression and saves the result. For PDFs that don't reach 100KB this way, try Adobe Acrobat's Save As Optimized, ilovepdf.com/compress_pdf, or convert images to grayscale first.
Use it when uploading certificates, ID proofs, or transcripts to portals that cap PDF size at 100KB. Common scenarios: SSC, UPSC, university entrance applications, scholarship portals.
Pre-compress source images before creating the PDF — start with photos at 600×800 pixels and 70% JPG quality. Scan documents at 150 DPI grayscale instead of 300 DPI colour. The smaller the source content, the easier 100KB becomes.
Your scanner probably saved at 300+ DPI colour. Re-scan at 150 DPI grayscale and the file will be tiny.
Not in browser — for image down-sampling use Acrobat or ilovepdf.com.
Yes — object-stream compression is lossless. Image quality is unchanged.
Explore more pdf tools on the tool hub — or jump straight to the Merge PDF, Rotate PDF, Unlock PDF.