Compress PDF to 100KB for certificates, mark sheets and ID proofs, the most common limit on Indian application portals. Pick your PDF and get a version under 100 KB that is still clear to read, without installing anything. Scanned on your phone? Compress documents for online form uploads in one go, or merge PDF files before you shrink them.
How to compress PDF to 100KB
- Select the PDF you need to upload.
- Leave the target at 100 KB, or tick “Black and white” for text-only documents.
- Tap “Compress to 100 KB”. Pages are processed one by one with progress shown.
- Download the PDF under 100 KB and check the size shown before uploading.
What fits in 100 KB
| 1–2 page certificate or mark sheet | Clear and readable, even in colour |
|---|---|
| 3–5 page document | Readable; black and white recommended |
| 10+ pages | Too small to stay readable; use 500 KB or split the PDF |
Frequently asked questions
Which documents usually need to be under 100 KB?
Many recruitment and admission portals cap uploads such as Class 10 and 12 mark sheets, caste and income certificates, domicile certificates and ID proofs at around 100 KB. Always check the exact limit and format in your notice, since some ask for JPG instead of PDF.
What if my document is a photo, not a PDF?
Use Compress Documents for Online Form, which turns photos of pages into one PDF under your limit and cleans up the paper. Or use JPG to PDF first and then compress here.
Does compressing change my document's page size?
No. Each page keeps exactly its original width and height, so an A4 certificate prints as A4 and looks normal in the portal's preview.
How long does it take?
A few seconds for one or two pages on most phones. Longer documents take longer because each page is rendered and compressed in turn.
Can I compress several PDFs to 100 KB at once?
One at a time for now. Each file needs its own compression run so that every one ends up under the limit.
Step-by-step guide: How to Reduce PDF Size for Online Form Uploads
Related tools
- Compress PDF to 200KBShrink a PDF to under 200KB for uploads.
- Compress PDF to 50KBShrink a PDF to under 50KB for strict upload limits.
- Compress PDFReduce PDF size losslessly or to any target in KB or MB.
- JPG to PDFTurn photos and scans into one PDF, A4 or image size.
- Compress Documents for Online FormShrink certificates and ID scans under 100–500 KB as JPG or one PDF.
- Merge PDFCombine several PDF files into one, in any order.