RPF Constable Official
Signature Compressor (2026)
Compress your signature to the strict 30KB–70KB limit required by Railway Recruitment Board. Enforces blue or_black ink rules.
Official Signature Specifications
- File size: 30KB – 70KB
- Dimensions: 590 × 236 px
- Ink color: blue or_black
- Must be in running handwriting, not block/capital letters.
- Scanned signature must strictly fit within a 50mm x 20mm physical box.
- Sign on plain white paper with black or blue ink.
How to Use
Upload Signature
Take a clear photo of your signature on plain white paper.
Auto-Process
Our tool removes dark backgrounds and compresses to the strict 30KB–70KB RRB requirements.
Download
Save the processed file. It is now ready for the RRB portal.
FAQ
Is this signature tool officially provided by RRB?
No. FreeApplyTools is an independent utility. The engine follows official RRB notification rules for 2026.
Why is my signature being rejected?
Signatures are often rejected if in wrong ink color (e.g., blue when black is required), on lined paper, or over 70KB. Our tool fixes the file size.
Common RPF Constable Signature Upload Errors
"File size exceeds 70KB"
The RRB portal blocks uploads above 70KB. Our compressor automatically reduces to 30–70KB.
"Signature not in blue or_black ink"
Many applicants sign in blue or pencil. RRB explicitly requires blue or_black ink on plain white paper.
"Signature scanned on lined/ruled paper"
Use blank white paper. Notebook lines in the scan are a common rejection reason across government exam portals.