fingerprintDocument Tool
Thumb Impression Resizer
Reduce your left or right thumb impression file size for govt exams. Target exactly 20KB for SSC or 50KB for IBPS/Bank exams.
checklistStandard Thumb Impression Rules
File Size Limit
10-20KB (SSC) or 20-50KB (IBPS)
Allowed Format
JPG/JPEG
Standard Dimensions
3cm x 3cm or 4cm x 3cm
Ink Color
Black or Blue ink pad
Background
Clean white paper
How to take a perfect thumb impression for forms
- Wash and dry your hands to prevent smudging.
- Press your left thumb firmly (but not too hard) onto a blue or black ink pad.
- Press it once onto clean, unruled white paper. Do not roll your thumb.
- Scan the paper at 200 DPI using a scanner app or flatbed scanner.
- Crop the image closely around the thumbprint so there is no unnecessary white space.
- Use the compressor above to ensure the file size is under the required limit (e.g., 20KB).
Common Rejection Reasons
- Smudged print: Lines are not clearly visible due to too much ink.
- Too light: Not enough ink applied.
- Wrong format: Uploaded as PDF or PNG instead of JPG/JPEG.
- Oversized file: File exceeds the 20KB or 50KB limit set by the portal.
Frequently Asked Questions
What is the thumb impression size for SSC?
For SSC exams (CGL, CHSL, MTS), the left thumb impression should be between 10 KB and 20 KB in JPEG format.
What is the thumb impression size for IBPS?
For IBPS and Bank exams, the left thumb impression should be between 20 KB and 50 KB in JPEG format.
Should I use blue or black ink?
Most notifications accept either black or blue ink, but black is often preferred for better contrast when scanning. Always check the specific exam notification.
Is it safe to upload my thumb impression here?
Yes. Our tool is 100% client-side. Your thumb impression never leaves your device and is not stored on any server.