Updated · how we check
CTET photo and signature size
The CTET form takes a photo of about 35 × 45 mm, 10 KB–100 KB and a signature of about 35 × 15 mm, 3 KB–30 KB, both as JPG/JPEG.
CTET photo
JPG · 10-100 KB (10,240-100,000 bytes) · 35x45 mm at 300 DPI · white background
PixelFit aims between 10,240 and 100,000 bytes, so the file passes whether the form counts 1 KB as 1,000 or 1,024 bytes. 35x45 mm at 300 DPI is 413x531 pixels.
Fit, background and padding crop to fill · white background · padding off
Saving presets is part of Pro.
The result appears here: the exact byte count, pixel size and quality, the size before and after, a preview and a download button.
The batch kit (one ZIP for up to 500 photos, several photos merged into one PDF) is part of Pro.
CTET upload specifications
Values for the CTET September 2026 online application, copied from CTET September 2026 Information Bulletin (linked from ctet.nic.in), checked 31 October 2026; "not stated" means the source gives no figure for it.
| Upload | Pixel size | Print size | File size | Format | Background |
|---|---|---|---|---|---|
| Photo | 413 × 531 px at 300 DPI (computed; the tool uses this) | 35 × 45 mm | 10 KB–100 KB | JPG/JPEG | not stated |
| Signature | 413 × 177 px at 300 DPI (computed; the tool uses this) | 35 × 15 mm | 3 KB–30 KB | JPG/JPEG | not stated |
CTET sizes in pixels and millimetres
Print sizes become pixels at a resolution (pixels = mm ÷ 25.4 × DPI); pixel sizes become print sizes the other way round. Computed for the CTET uploads at 200 and 300 DPI.
| Upload | Aspect ratio | Megapixels | At 200 DPI | At 300 DPI |
|---|---|---|---|---|
| Photo | 7:9 (print size) | 0.22 MP at 300 DPI | 276 × 354 px | 413 × 531 px |
| Signature | 7:3 (print size) | 0.07 MP at 300 DPI | 276 × 118 px | 413 × 177 px |
What the CTET KB limits mean in bytes
The CTET photo range of 10 KB–100 KB is 10,240 to 100,000 bytes if you want a file that passes whether the portal counts 1,000 or 1,024 bytes per KB: a window of 89,760 bytes to aim for.
The CTET signature range of 3 KB–30 KB is 3,072 to 30,000 bytes if you want a file that passes whether the portal counts 1,000 or 1,024 bytes per KB: a window of 26,928 bytes to aim for.
Estimated JPG file size for CTET uploads
Estimated from sizes measured with sharp 0.35.5 / libvips 8.18.7 on public-domain sample images (31 October 2026), interpolated to each target size. Your own scan can land 30-50% either side, which is why the tool measures the real file.
| Upload | Pixel size used | Quality 60 | Quality 75 | Quality 85 | Quality 95 | Limit |
|---|---|---|---|---|---|---|
| Photo | 413 × 531 px | 24.4 KB | 31.2 KB | 41.2 KB | 72.2 KB | 10 KB–100 KB |
| Signature | 413 × 177 px | 5.0 KB | 7.0 KB | 10.0 KB | 19.2 KB | 3 KB–30 KB |
Will the CTET photo fit the limit?
For the CTET photo at 413 × 531 px (35 × 45 mm at 300 DPI), even quality 95, the highest setting estimated here, stays under 100 KB at about 72.2 KB, and quality 85 (41.2 KB) clears the 10 KB minimum.
For the CTET signature at 413 × 177 px (35 × 15 mm at 300 DPI), even quality 95, the highest setting estimated here, stays under 30 KB at about 19.2 KB, and quality 85 (10.0 KB) clears the 3 KB minimum.
CTET rejection checklist
Upload checks computed from the CTET specification; a file that fails any one of them is usually refused at upload or flagged later.
- Photo: File type is JPG/JPEG (a PNG or HEIC renamed to .jpg is still rejected).
- Photo: The CTET photo file is no larger than 100 KB (100,000 bytes is safe under both KB definitions).
- Photo: The CTET photo file is at least 10 KB (10,240 bytes or more); files under the minimum are rejected even when they look sharp.
- Photo: Printed size is 35 × 45 mm.
- Signature: File type is JPG/JPEG (a PNG or HEIC renamed to .jpg is still rejected).
- Signature: The CTET signature file is no larger than 30 KB (30,000 bytes is safe under both KB definitions).
- Signature: The CTET signature file is at least 3 KB (3,072 bytes or more); files under the minimum are rejected even when they look sharp.
- Signature: Printed size is 35 × 15 mm.
How to resize your photo for CTET
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Take or scan the photo
Use a recent photo. Frame it in the 35 × 45 mm shape.
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Load the preset
Drop the file into the tool at the top of this page. The "CTET photo" preset is already set to 35 × 45 mm and 10 KB–100 KB, as JPG/JPEG.
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Check the result
Read the before and after sizes: the CTET photo must end between 10,240 and 100,000 bytes. If it ends under 10 KB, open "Fit, background and padding" and tick the option to pad a file that ends up below the minimum. Download it.
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Switch to the signature
Pick the "CTET signature" preset, set to 35 × 15 mm and 3 KB–30 KB as JPG/JPEG, and repeat with the signature file. If it ends under 3 KB, open "Fit, background and padding" and tick the option to pad a file that ends up below the minimum.
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Upload and preview
Upload the files on the CTET form and check the preview before you submit; verify the figures with the official notice first.
CTET compared with similar forms
Of these 5 forms, the CTET photo limit of 100 KB is the most generous; a file made for a stricter form usually passes a more generous one only if it also meets the minimum and the pixel size.
| Form | Photo size | Photo file size | Signature file size |
|---|---|---|---|
| CTET (this page) | 35 × 45 mm | 10 KB–100 KB | 3 KB–30 KB |
| NBEMS | no pixel size stated | at most 80 KB | at most 80 KB |
| IBPS PO | 200 × 230 px (preferred) | 20 KB–50 KB | 10 KB–20 KB |
| ISRO ICRB | 200 × 230 px (preferred) | 20 KB–50 KB | 10 KB–20 KB |
| MAH B.P.Ed CET | 200 × 230 px (preferred) | 20 KB–50 KB | 10 KB–20 KB |
Where the CTET figures come from
This page covers Central Teacher Eligibility Test, September 2026 (22nd edition).
Verify with the official CTET notice before you submit: forms change between application cycles and the check on the live portal is final.
Sources
- CTET September 2026 Information Bulletin (linked from ctet.nic.in), Central Board of Secondary Education (CBSE), CTET unit, checked 31 October 2026: cdnbbsr.s3waas.gov.in/s3443dec3062d0286986e21dc0631734c9/…
- Measured by PixelFit with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026, interpolated to each CTET target size, on these samples: head-and-shoulders portrait, Pete Souza (Official White House photo), public domain: commons.wikimedia.org/wiki/File:President_Barack_Obama.jpg; handwritten letter with signature, Ulysses S. Grant (via DPLA), public domain: commons.wikimedia.org/wiki/File:Ulysses_S._Grant_letter_t…
Frequently asked questions
What is the photo size for CTET in KB?
The CTET photo must be 10 KB–100 KB (keep it at or under 100,000 bytes to be safe), 35 × 45 mm, as JPG/JPEG.
What is the signature size for CTET?
The CTET signature must be 3 KB–30 KB, 35 × 15 mm, as JPG/JPEG.
How do I resize my photo to 100 KB for CTET?
Open the tool on this page with the CTET photo preset, drop the file and download the result: it searches JPG quality until the file is under 100 KB and over 10 KB; at 413 × 531 px expect about 41.2 KB at quality 85. Nothing is uploaded.
What pixel size should the CTET photo be?
35 × 45 mm. At 300 DPI that is 413 × 531 px; at 200 DPI 276 × 354 px.
Can I upload a PNG or PDF for the CTET photo?
Only JPG/JPEG; PNG, PDF, HEIC are not listed. The tool can turn a PNG, WebP or (in Safari) HEIC file into JPG while it resizes.
Related
Similar forms
- NBEMS photo and signature size at most 80 KB
- IBPS PO photo and signature size 20 KB–50 KB
- ISRO ICRB photo and signature size 20 KB–50 KB
- MAH B.P.Ed CET photo and signature size 20 KB–50 KB
- SBI photo and signature size 20 KB–50 KB
- TGPSC Departmental Tests photo and signature size at most 50 KB
Compress to the CTET limits
- Compress an image to 100 KB CTET photo limit 10 KB–100 KB
- Compress an image to 30 KB CTET signature limit 3 KB–30 KB
Resize to the exact size
Change the file format
- PNG to JPG CTET accepts JPG/JPEG
- WEBP to JPG CTET accepts JPG/JPEG
- HEIC to JPG CTET accepts JPG/JPEG