Note (updated September 26, 2026): RRB notices publish different photo and signature limits from year to year, and we could not confirm the current numbers from an official source. Treat the figures below as typical, and always follow your own CEN notification. The RRB NTPC kit lets you pick the range your form shows.
RRB NTPC, Group D, and ALP Photo and Signature Specifications
The Railway Recruitment Boards (RRBs) conduct examinations for various positions in Indian Railways, including NTPC (Non-Technical Popular Categories), Group D (Level 1), and ALP (Assistant Loco Pilot). The online application process requires uploading a photograph and signature with strict technical specifications.
With RRBs receiving millions of applications for each recruitment cycle, the upload portal is under tremendous load during the application window. Having your files pre-compressed and ready saves valuable time and ensures you do not miss the deadline while troubleshooting file size errors.
RRB Photo Requirements
- File Size: 20KB to 50KB in some notices, 30KB to 70KB in others. Use the range in your CEN notification.
- Dimensions: published figures include 200×230 and 320×240 pixels. Follow your notification.
- Format: JPEG only
- Background: Plain white or light-colored
- Specifications: Recent passport-style photo, no sunglasses, no cap, neutral expression
RRB Signature Requirements
- File Size: 10KB to 20KB
- Dimensions: check your notification. Signatures are wide rather than tall.
- Format: JPEG only
- Specifications: Handwritten in black ink on white paper, scanned or photographed clearly
Step-by-Step: Prepare Your RRB Application Files
- Take a fresh passport photo against a white background with even, diffused lighting.
- Open the photo compressor to 50KB — the 50KB target ensures your photo fits within the RRB limit while maintaining excellent quality.
- Upload your original photo and use the quality slider to reach 50KB. The tool provides real-time file size feedback.
- Download the compressed JPEG and check it against the size and dimensions in your notification.
- Prepare your signature — sign on clean white paper with black ink.
- Use the signature compressor to get your signature to 10KB at the correct dimensions.
- Upload both files to the RRB application portal at rrbapply.gov.in.
Document Uploads for RRB Exams
In addition to photo and signature, RRB applicants typically need to upload scanned copies of:
- Class 10 Marksheet (proof of age) — PDF under 500KB
- Class 12 / ITI Certificate (educational qualification) — PDF under 500KB
- Caste/Category Certificate (if applicable) — PDF under 500KB
- PwBD Certificate (if applicable) — PDF under 500KB
Use the PDF compressor to ensure all document PDFs are under 500KB each. For detailed RRB NTPC specifications, visit the exam guides section (RRB specifications are similar to SSC requirements).
Common RRB Upload Errors
- Overcompressed photo: Compressing below 20KB may make the photo pixelated and unrecognizable, leading to rejection during document verification.
- Incorrect file dimensions: keep to the dimensions in your notification. Very large images may be rejected.
- Wrong format: Only JPEG is accepted for photos and signatures. Convert any PNG files to JPEG before uploading.
Private & Secure Processing
RRB applications involve uploading personal photographs and signatures that, combined with your identity details, constitute sensitive biometric data. CompressKaro processes your images entirely in your browser using HTML5 Canvas API — zero uploads, zero server storage. Your railway exam application materials remain completely private and under your control.