JPG to PDF Converter Under 100 KB — Combine Photos into a 50–100 KB PDF
Turn one or more phone photos (Aadhaar front & back, PAN card, marksheet or caste certificate) into a single A4 PDF guaranteed to stay under 100 KB.
JPG, PNG, WebP · up to 50 files at once · nothing is uploaded
JPG to PDF 100 KB specification
| Requirement | Value |
|---|---|
| Input formats | JPG, JPEG, PNG, WebP (up to 60 photos in custom order) |
| Output format | Standard PDF (.pdf), A4 portrait/landscape or fit-to-image |
| Target file weight | Under 100 KB (lands between 82 KB and 97 KB — inside 50–100 KB windows) |
| Common use case | Combining Aadhaar front + back photos or phone-clicked certificates into one <100 KB PDF |
Source: Instructions for uploading documents — UPSC Online candidate portal (current PDF linked from the portal's 'Instructions and FAQs' menu, read September 2026). checked on 2026-09-20.
Specifications change between recruitment cycles. Always check the current official notification before you upload.
Turning Phone Photos into a Strict 50–100 KB PDF
Most candidates do not own a flatbed scanner. When an application form asks for a photo ID proof, caste certificate, EWS annexure, or bank passbook as a PDF under 100 KB (or between 50 KB and 100 KB), you photograph the paper with your smartphone camera.
A modern smartphone camera produces a 3 MB to 6 MB image. If you convert that image to PDF using a generic phone print-to-PDF option, the resulting PDF still weighs 3 MB—thirty times larger than a 100 KB portal limit.
How our client-side JPG-to-PDF builder hits 85–97 KB
Instead of blindly wrapping the raw camera file, the tool above performs three steps inside your browser:
- Print-Scale Normalisation: Each photo is decoded on your device and scaled to A4 print dimensions so excess megapixel noise is removed while text remains sharp.
- Multi-Page Budgeting: Whether you add 1 photo (a marksheet) or 2 photos (Aadhaar card front and back), the byte budget is shared across the entire PDF container.
- 7-Step Quality Binary Search: The builder tests JPEG quality levels inside the
pdf-libcontainer until it finds the highest quality that lands just under 100 KB—typically 88 KB to 97 KB, which satisfies both< 100 KBceilings and50–100 KBwindows (such as UPSC CSE ID proofs at50–300 KBand state forms at50–100 KB).
Best practices when photographing a document for a 100 KB PDF
- Crop out the table or bedsheet first: Dark, textured backgrounds around your paper waste kilobytes that should go toward the text on the page.
- Shoot in daylight with flash off: A glossy glare spot on a laminated marksheet or PVC Aadhaar card cannot be fixed by compression.
- Combine front and back in order: Always place the front of your ID card as Page 1 and the address/back side as Page 2 using the queue arrows before building the PDF.
How it works
- Drop one or more JPG/PNG photos into the box above (100 KB is already pre-filled in the PDF size field).
- Uploading front and back of an ID card? Add both photos and use the ↑ and ↓ arrows to put the front side first.
- Click 'Make my PDF' — the tool scales and re-encodes the photos inside a standard A4 PDF container under 100 KB.
- Verify the final KB size shown on the green result card (typically 88–97 KB) and click Download.
Upload errors and how to fix them
PDF file size must be between 50 KB and 100 KB (or under 100 KB)
A single phone photo wrapped into a PDF normally weighs 2 to 4 MB. With 100 KB pre-filled above, our builder binary-searches the embedded JPEG stream so the finished PDF lands around 88–96 KB.
Both sides of ID proof must be uploaded in a single PDF file
Select both the front photo and the back photo of your Aadhaar, Voter ID or Driving Licence in the tool above, arrange their order with the ↑/↓ buttons, and click 'Make one PDF from 2 photos'.
PDF file is below the 50 KB minimum
If a tiny cropped image produces a 30 KB PDF when the portal requires 50–100 KB, keep 'Exact target bytes' checked so the builder chooses a higher JPEG quality that lands between 85 KB and 98 KB.
Which forms ask for this
Common questions
jpg to pdf 50kb to 100kb — does this land above 50 KB and below 100 KB?
Yes. When 100 KB is set as the target with exact sizing enabled, the binary search picks the highest image quality that still fits underneath 100 KB, which normally lands between 85 KB and 97 KB—safely inside any 50 KB to 100 KB window.
Can I combine two JPG photos (like Aadhaar front and back) into one 100 KB PDF?
Yes. Select both photos together (or click 'Add more' after selecting the first). Both images are placed into a single multi-page PDF and compressed together so the combined file stays under 100 KB.
What if I need a 50 KB or 80 KB PDF instead of 100 KB?
Simply type 50 or 80 into the 'PDF size' box before clicking 'Make my PDF'. The builder will target your exact KB ceiling.
Are my ID card photos uploaded to any server?
Never. The entire JPG-to-PDF assembly runs locally inside your browser using self-hosted pdf-lib. Your Aadhaar, PAN or marksheet photos never leave your device.