NDA and CDS Photo, Signature and PDF Upload Guide
NDA and CDS applications look simple until the upload step starts arguing with you. A photo that is clear on your phone may still fail because it is HEIC, too small in pixels, or outside UPSC's KB range. A signature that looks fine in the gallery may become unreadable after compression. And after the written exam, SSB document work becomes even stricter. This guide keeps the application-stage files ready before you enter the UPSC OTR portal.
UPSC NDA/CDS Upload Requirements - Photo, Signature and PDF
| Upload Type | Dimensions | Format | File Size |
|---|---|---|---|
| Photograph | 350 x 350 px minimum guidance | JPG / JPEG | 20-300 KB |
| Signature | Follow portal preview; keep clear | JPG / JPEG | 20-100 KB in document table; FAQ allows up to 300KB |
| Photo Identity Proof | Readable scan | Usually 20-300 KB | |
| Certificates if applicable | Readable PDF | As per current portal |
Verified May 2026: UPSC's official OTR FAQ says photograph/signature images should be JPG/JPEG and should not be below 20KB or above 300KB. Its newer document-upload instruction table lists signature as JPG, 20KB-100KB. Always follow the live NDA or CDS notification and portal validation if it is stricter.
Free Tools for UPSC NDA and CDS Applications
Photo Resize
Use the NDA/CDS preset for a UPSC-style 350 x 350px JPG and compress within 20-300KB.
Open toolSignature Crop
Crop your black-ink signature from white paper and keep it readable before upload.
Open toolImage Compress
Compress photo and signature JPG files when the portal reports a file-size error.
Open toolImage to PDF
Convert photo ID scans or certificate images into PDF files for UPSC upload fields.
Open toolPDF Merge
Combine front/back ID proof or multi-page certificates into one clean PDF.
Open toolPDF Compress
Reduce photo ID and certificate PDFs when UPSC's upload limit rejects the scan.
Open toolHow to Prepare NDA/CDS Upload Files in 5 Steps
Start with a fresh, plain-background photograph
Use a recent front-facing photograph with a plain light background. Avoid caps, dark glasses, filters, shadows, and heavily cropped faces. NDA and CDS admit cards, exam attendance, and later SSB identity checks all depend on the same application photograph, so choose a photo you can recognise clearly even after compression.
Resize and compress to the UPSC OTR range
Open Photo Resize, select the NDA/CDS preset, and export a JPG in the 20KB-300KB range. If your form or notification asks for name/date on the photo, add it before final compression. Do not rename PNG or HEIC files to .jpg; the portal checks real file encoding.
Make the signature readable, not just small
Sign on plain white paper using a black ink pen. Photograph or scan it in good light, crop out extra paper, and use Signature Crop. UPSC may show a preview before final submission; zoom in mentally and ask whether the signature would still be readable on an admit card. A tiny or faded signature can create problems later.
Prepare photo ID and certificates as PDFs
UPSC applications commonly ask for photo identity proof in PDF format, and some candidates need additional certificates. Scan documents flat, keep all corners visible, and use Image to PDF if you photographed the document. If the PDF is too large, use PDF Compress; if it has multiple pages, use PDF Merge.
Save the final files for SSB and future UPSC forms
After submitting NDA or CDS, keep the final photo, signature, application PDF, fee receipt, and photo ID PDF in one folder. If you clear the written exam, SSB document work moves quickly. Having clean digital copies ready saves time when you need to print, upload, or email documents for interview and medical stages.
NDA/CDS Upload Mistakes That Cause Rejection
Uploading PNG, HEIC, or renamed files
UPSC photo and signature fields expect JPG/JPEG. Renaming an iPhone HEIC file does not convert it.
Photo below minimum clarity
A tiny, blurry, dark, or over-compressed photo can pass KB checks but still fail visual review later.
Signature too faint or cut off
Crop around the whole signature and keep enough contrast. Do not let the signature touch the border.
Unclear photo ID PDF
The ID number and name should be readable after compression. If not, rescan instead of compressing harder.
About NDA, CDS and UPSC OTR
NDA and NA is the entry route for candidates aiming at the Army, Navy, and Air Force wings of the National Defence Academy and Naval Academy after Class 12. CDS is for graduate candidates applying for IMA, INA, Air Force Academy, and OTA. Both are conducted by UPSC, and both use UPSC's online application and OTR ecosystem.
The application upload stage is only the first document checkpoint. NDA candidates later need age proof, education proof, identity proof, and academy-specific documents. CDS candidates usually need graduation proof, final-year certificates where applicable, NCC certificates where claimed, identity proof, and category documents. A clean digital document set now makes SSB preparation easier later.
PrepTools is built for this exact paperwork stage. The files are processed inside your browser, so your photo ID, certificates, and signature do not leave your device.
Also applying for UPSC Civil Services?
Use the broader UPSC guide for Civil Services, CAPF, CMS, and DAF-style document preparation.