A wrong-sized upload can end an application before a single answer is marked. Government exam portals — UPSC, SSC, the banking exams, railway recruitment, and most college admission systems — check the photo and signature at the moment of upload, and a file that is too large, too small, or in the wrong format is rejected on the spot. The form doesn't explain why. It simply refuses the file, or flags it later during document verification.
The fix is to prepare both files to the exact specification before the form is even opened. This guide covers the photo and signature sizes commonly required across the major Indian exams, and a single repeatable method to hit any of them precisely.
One rule above all others: specifications change between exam cycles, and they differ from one authority to the next. Always cross-check the figures below against the official notification PDF for the specific exam and year you're applying in. The values here are accurate for recent cycles and useful for preparation, but the notification is the final word.
Why exam portals are so strict about file size
The photo and signature aren't formalities — they're identity documents used to verify a candidate at the exam centre and again during final document checks. That's why the rules are enforced by the form itself rather than reviewed later by a person.
The consequences are specific. A file over the KB ceiling is usually rejected silently — the upload button appears to do nothing, or the form throws a generic error. A file under the minimum is accepted but looks blurry to verifiers, which can trigger a rejection at the document-authentication stage even after the form was submitted. And a file in the wrong format — a PNG, or an iPhone HEIC where the portal demands JPG — is refused outright. Each of these is avoidable with the right preparation.
Common photo and signature specs
The table below lists the file-size and format requirements most frequently published for these exams. Treat the ranges as a starting point and confirm against the official notification.
| Exam | Photograph | Signature | Format | Background |
|---|---|---|---|---|
| UPSC CSE | 20–300KB, face ~75% of frame | 20–100KB | JPG | Plain white |
| SSC (CGL / CHSL / GD / MTS) | 3.5×4.5cm, 20–50KB | ~4×2cm, 10–20KB | JPG | White |
| IBPS / banking | ~20–50KB | ~10–20KB | JPG | White |
| College / university admission | typically 10–200KB | typically 10–50KB | JPG | White / plain |
A few details that catch candidates out:
- UPSC wants the face to fill roughly 75% of the photo — a tighter, more zoomed-in crop than SSC or banking exams use. A standard rectangular portrait often needs re-cropping for UPSC specifically.
- The portal validates the exact byte count. A photo at 298KB is inside a 300KB limit and will upload; a photo at 301KB will not. There's no rounding.
- Signatures must be on plain white paper in dark ink, scanned or photographed cleanly, then sized down to the small KB target — usually the smallest file in the whole application.
How to resize your photo and signature to an exact KB size
Sukat handles every step in the browser. For identity documents this matters twice over: the process is fast, and because everything runs locally, the photo and signature never leave the device.
- Crop to the required shape. Crop the photograph to the exam's ratio — a tight crop with the face filling most of the frame for UPSC, or the standard 3.5×4.5cm proportion for SSC. Crop the signature to a clean rectangle with minimal surrounding white space.
- Fix the background if it must be white. Most portals require a plain white background and reject grey, cream, or patterned ones. If the photo's background isn't clean white, remove and replace it before sizing — Sukat does this locally, no upload involved.
- Set the exact file-size target. Enter the target in KB — 50KB for an SSC photo, 20KB for a signature, whatever the notification states. Sukat runs a binary search on the quality level to land on that exact size at the best quality the size allows.
- Export as JPG. Indian exam portals require JPG/JPEG, not PNG or WebP. Export the photo, then repeat for the signature at its own smaller target. If the original photo is a HEIC file from an iPhone, convert it to JPG first — the portals don't accept HEIC.
Two files, two targets, no installed software — and nothing uploaded to a third-party server along the way.
Mistakes that get an application rejected
- Under-compressing. Pushing a photo well below the minimum KB to "be safe" makes it blurry, and verifiers reject blurry identity photos.
- Going over the ceiling. A file one kilobyte over the cap is refused; the form doesn't round down.
- Wrong format. Uploading a PNG, a screenshot, or an unconverted HEIC where JPG is required.
- Non-white background. Studio backdrops with a slight tint, walls, or gradients get flagged — especially by UPSC, which checks this closely.
- Reusing an old photo. A portal may accept the upload, but a clearly dated photograph can be grounds for rejection during in-person verification.
Preparing both files correctly the first time removes every one of these.
Frequently asked questions
What size should a UPSC photo be?
For recent cycles, a UPSC photograph is a JPG between 20KB and 300KB on a plain white background, with the face covering about 75% of the frame; the signature is a JPG between 20KB and 100KB. Always confirm the exact figures in the official UPSC notification for the year you're applying in.
What is the SSC signature size?
SSC typically requires the signature as a JPG of about 4×2cm with a file size between 10KB and 20KB — usually the smallest file in the whole application. The SSC photograph is 3.5×4.5cm at 20–50KB.
How do you reduce a photo to exactly 50KB?
Set 50KB as the target file size in Sukat and let it compress. Rather than guessing a quality percentage, Sukat runs a binary search to find the quality level that lands the file at or just under 50KB.
Is it safe to resize identity photos online?
With Sukat, yes — the compression and background editing run entirely in the browser on your device. The photo and signature are never uploaded to a server, which is the relevant safeguard for documents tied to your identity.
Can you resize a photo and signature without installing software?
Yes. The entire workflow — crop, background fix, and compress to an exact KB target — runs in the browser with no download and no account. It also works offline once the page has loaded.
About Sukat
Sukat builds free, privacy-first browser tools for compressing images and verifying published content. Everything runs in your browser — nothing is uploaded.
