RPF Constable Signature Compressor
Official 2026 Size & Format
Compress your signature to the strict 30KB–70KB limit required by Railway Recruitment Board. Enforces blue or_black ink rules.
Why format your signature for RPF Constable?
The Railway Recruitment Board (RRB) strictly mandates that all uploaded signatures must be between 30KB and 70KB for the 2026 RPF Constable application. Furthermore, the portal will reject your application if the signature is not done in blue or_black ink on plain white paper. Our free RRB signature compressor uses secure client-side processing to guarantee your file meets these exact specifications and ensures your signature remains crisp and legible for the final admit card.
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.
Next Steps for RPF Constable
Continue preparing your application documents with official specifications.