Left Thumb Impression Scanner & Resizer (20KB - 50KB for SBI / IBPS / SSC Forms)
Invert, clean background noise, enhance ink ridges, and resize left thumb impressions to exact 20-50 KB / 240x240 px standards for SBI Clerk, IBPS PO, and SSC forms.
🔒 Processed 100% locally. No biometric data ever leaves your device.
Official Commission Thumb Impression Standards
Click any preset to auto-configure exact dimensions, background contrast, and strict KB file size ceilings.
SBI Clerk / PO (20 - 50 KB)
Black/Blue ink on white paper (240x240 px)
IBPS PO / Clerk (20 - 50 KB)
Clear left thumb impression strictly under 50 KB
SSC CGL / CHSL / GD
Horizontal or square thumb imprint
UPSC Civil Services
High resolution crisp ink impression
Railway RRB ALP / NTPC
Clear ridge pattern thumb scanner
State Police Bharti
Left thumb fingerprint capture
Frequently Asked Questions on Thumb Impressions
1. What is the required thumb impression dimension for IBPS and SBI forms?
IBPS and SBI mandate a 240 × 240 pixel dimension (square) with a file size strictly between 20 KB and 50 KB in JPG/JPEG format on pure white paper.
2. How does the background noise cleaner work on mobile phone photos?
The client-side scanner applies adaptive thresholding and contrast boosting to eliminate shadows and uneven paper tints while enhancing the blue/black fingerprint ridges.
3. Is my fingerprint data private and safe?
Yes, 100% private. All processing executes inside your browser canvas with zero server uploads.
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