RRB Signature Resizer
Instantly prepare your signature (20KB - 30KB) for all Railway Recruitment Board online application forms.
Tap to Select Your Signature
Supports JPG, PNG images directly from your mobile or PC
Crop Signature to RRB Rules
Drag the corners to frame your signature securely.
RRB Form Format
RRB requires signatures to be between 20KB and 30KB.
How to Format Your Signature for RRB Exams
Upload Your Signature
Sign your name in running letters (not block letters) on a blank white paper using a black or blue pen. Take a clear photo and upload it here.
Crop to RRB Dimensions
Our tool automatically locks the crop box to the official 50mm x 20mm wide rectangle required by the Railway board. Simply drag the corners to fit.
Download Instantly
Click the green download button. The tool will cleanly crop the image, enforce the 20KB-30KB limit, and give you a JPEG file ready for upload.
Why Use Our RRB Signature Resizer?
Prevents "Invalid Format" Errors
Applying for RRB NTPC, ALP, JE, or Group D? The recruitment portal will reject signatures that are too square or too large. We mathematically enforce the strict 50x20mm ratio to guarantee acceptance.
Absolute Signature Privacy
Your signature is a highly sensitive document. Our cropping and compression algorithms run securely inside your own browser. Your signature is never uploaded to remote internet servers.
Hits the 30KB Limit Safely
Compressing a signature file down to 30KB can often make the ink look blurry or pixelated. Our tool carefully balances the compression so your handwriting remains sharp and legible.
Mobile Friendly & Free
You don't need a computer or a trip to a cyber cafe. Snap a photo of your signature with your smartphone and use this free tool to format it instantly, anywhere you are.
Frequently Asked Questions
The Railway Recruitment Board requires your scanned signature to be in JPEG format. The dimensions must be exactly 50 mm in width and 20 mm in height. Crucially, the file size must be kept strictly between 20 KB and 30 KB. Also, signatures in all CAPITAL LETTERS are usually rejected.
Yes! Use the dropdown menu in the settings box to switch from "RRB Signature" to "RRB Photo". The crop box will automatically adjust from a wide rectangle to a 35x45mm portrait shape, and the file size target will shift to 70KB.
If your original photo is taken in very low light or from very far away, zooming in to crop the signature will cause blurriness. For best results, use a thick black pen, sign on pure white paper, and hold your camera close when taking the original picture.
It is completely safe on Toolszu. We utilize client-side JavaScript processing. The cropping, measuring, and file shrinking happen inside the memory of your own browser. Your signature is never transmitted to our web servers.