Your PAN card photo must be under 50 KB in JPEG format, and your signature must be under 20 KB in JPEG format. These limits apply to both NSDL (onlineservices.nsdl.com) and UTI (utiitsl.com). If your file exceeds these sizes, the portal will block the upload — often with a vague error that doesn’t mention KB at all.
Exact File Size and Dimension Requirements
| Document | Max File Size | Format | Dimensions | Portal |
|---|---|---|---|---|
| Passport photo | 50 KB | JPEG / JPG | 3.5 cm × 4.5 cm (passport size) | NSDL & UTI |
| Signature | 20 KB | JPEG / JPG | White background, black ink | NSDL & UTI |
| Supporting document (proof of identity/address) | 300 KB (PDF) | — | NSDL & UTI |
These requirements are set by the Income Tax Department and are identical across both authorised PAN service agencies. A photo or signature file larger than the limit cannot be uploaded — there is no workaround on the portal side.
Why Photo Files Are So Often Over 50 KB
A smartphone camera in 2024 produces JPEG files between 1 MB and 5 MB for a standard portrait photo. That is 20–100 times the 50 KB ceiling. The file is large not because it is high-resolution in any meaningful way, but because modern camera sensors capture more detail than a portal’s identity verification system needs or can use.
Here is the part most guides skip: JPEG compression is not linear. Compressing a 2 MB photo to 45 KB does not noticeably reduce visible quality at passport-photo dimensions. JPEG uses a block-by-block algorithm that handles smooth gradients (skin tones, backgrounds) far more efficiently than fine texture or sharp edges. A plain-background passport photo at 50 KB is indistinguishable from one at 500 KB when printed at 3.5 × 4.5 cm — which is why the portals can set such a tight limit without affecting print quality.
Signatures are different. A black pen on white paper has hard, high-contrast edges everywhere — JPEG compresses this much less efficiently than a smooth face photo. A signature scanned at 300 DPI can easily exceed 150 KB. This is why the signature limit (20 KB) is actually tighter relative to original file size than the photo limit, and why signatures fail more often.
How to Resize Your PAN Card Photo to Under 50 KB
The free PAN card photo resizer at pancardphotoresizer.in compresses and crops your photo to meet the exact KB and dimension requirements. The tool runs in your browser — your photo never leaves your device.
- Go to pancardphotoresizer.in. Select whether you are applying through UTI or NSDL.
- Upload your photo. JPG, JPEG, or PNG accepted. If your photo is a HEIC file (iPhone default), convert it to JPG from your Photos app first: tap Share → Save as JPEG.
- Crop to passport size. The tool provides a crop overlay locked to the 3.5 × 4.5 cm ratio. Centre your face with a small gap above your head.
- Download. The tool outputs a JPEG under 50 KB. Save it and upload to the NSDL or UTI form directly.
For your signature: use the Signature tab on the same tool. Upload a photo or scan of your signature on plain white paper, and the tool compresses it to under 20 KB.
Common Reasons the Portal Still Rejects the File After You Resize
Dimension check fails before the KB check. Portals validate file dimensions before file size. If your photo is landscape-oriented (wider than it is tall), it will fail the dimension check and you will see a generic upload error — not a KB error. Crop to portrait orientation first, then compress. The resizer handles this automatically if you use the crop step.
The file is PNG, not JPEG. Even if your PNG is under 50 KB, the portal rejects it. JPEG is the only accepted format. The resizer always outputs JPEG regardless of what format you upload.
The file was renamed to .jpg but is still a PNG internally. This happens when you take a screenshot on an iPhone or Android and rename the file. The extension says .jpg but the actual format is PNG or WEBP. Portals check the file header, not just the extension. Use a proper converter or the resizer tool.
The signature has a coloured or ruled background. Portals are not strict about background shade on photos, but they are on signatures — a cream background or blue lines from notebook paper will cause rejection. Sign on blank white A4 paper and photograph it against a white surface.
Checking Your File Size Before Upload
On Windows: right-click the file → Properties → look at Size under the General tab. On a Mac: select the file → press Command-I → look at Size. On Android: open Files by Google or any file manager → tap and hold the file → Details. On iPhone: open the Files app → tap and hold the image → Info.
Compare the number to the limit. If it shows “48 KB” or “0.048 MB”, you are within the 50 KB limit. If it shows “1.2 MB” or “1,200 KB”, it needs compression.
Frequently Asked Questions
What is the PAN card photo size in KB for NSDL?
NSDL requires your passport photo to be under 50 KB in JPEG format. Your signature must be under 20 KB in JPEG format. Supporting documents (proof of identity/address) must be under 300 KB in PDF format.
What is the PAN card photo size in KB for UTI?
UTI (utiitsl.com) uses the same limits as NSDL: photo under 50 KB in JPEG, signature under 20 KB in JPEG. Both agencies operate under Income Tax Department specifications, so the requirements are identical.
Can I use a photo that is exactly 50 KB?
Yes. The portal accepts files up to and including 50 KB. A file of exactly 50,000 bytes (50 KB) will pass. Aim for 40–49 KB to leave a small margin, since some file systems report sizes slightly differently.
My file shows 45 KB on my phone but the portal says it is too large — why?
KB means different things in different contexts. In computing, 1 KB = 1,024 bytes (kibibytes). In storage and telecoms, 1 KB = 1,000 bytes (kilobytes). A “45 KB” file on your Android phone may be 45 × 1,000 = 45,000 bytes, while the portal measures in kibibytes and sees it as 43.9 KiB — well within limits. This is rarely the actual cause of rejection. More likely causes: wrong format (not JPEG), wrong dimensions, or the file manager showing the wrong size. Re-download and re-check.
Does compressing to under 50 KB affect the print quality on the physical PAN card?
No. UIDAI and Income Tax Department PAN printing runs at fixed DPI with a fixed print area of 3.5 × 4.5 cm. A JPEG at 45 KB with proper passport-photo dimensions contains enough data for that print size. The quality difference between a 50 KB JPEG and a 500 KB JPEG at 3.5 cm width is not visible to the human eye on the printed card.
