CTET Photo & Signature Resizer (CBSE Official Format)
Crop and compress photograph (10KB–100KB, 3.5×4.5 cm) and signature (3KB–30KB) for CBSE CTET teacher eligibility forms. CBSE Central Teacher Eligibility Test (CTET) mandates that candidate photographs be sized strictly between 10KB and 100KB with 3.5 cm × 4.5 cm dimensions, while the signature scan must be between 3KB and 30KB (3.5 cm × 1.5 cm). Our client-side engine formats both in 2 seconds with zero compression blur.
Indian Govt Exam Photo & Signature Specifications (2026-27)
| Recruitment Portal | Target Size (KB) | Dimensions | Name & Date? | Background |
|---|---|---|---|---|
| SSC (CGL, CHSL, MTS, GD) | 20 KB – 50 KB | 3.5 × 4.5 cm (100×120 px) | Yes (Mandatory) | White / Light |
| UPSC Civil Services (OTR) | 20 KB – 300 KB | 350 × 350 px (Square 1:1) | Recommended | White / Plain |
| Bank (IBPS, SBI, RRB) Signature | 10 KB – 20 KB | 140 × 60 px (2:1 Ratio) | No | Pure White Ink |
| NTA NEET UG Passport & Postcard | 10 KB – 200 KB | Passport & 4×6 inch Postcard | Yes (DOP Stamp) | White Background |
| Railway RRB (ALP, Tech, NTPC) | 30 KB – 70 KB | 35 × 45 mm | Optional | White / Plain |
How to Use CBSE Central Teacher Eligibility Test (CTET) Resizer Online
- 1Upload your portrait photograph or scanned signature.
- 2Adjust crop area to center your face (70% coverage).
- 3Set target size slider between 10KB and 100KB (recommended: 50–70KB).
- 4Download your CTET-ready JPG file.
Official Requirements: CBSE Central Teacher Eligibility Test (CTET)
CBSE CTET guidelines: 10-100KB JPG photo (3.5x4.5cm) and 3-30KB signature (3.5x1.5cm).
- Photo dimensions: 3.5 cm (width) × 4.5 cm (height).
- Photo file size: 10 KB to 100 KB in JPG/JPEG.
- Signature dimensions: 3.5 cm (width) × 1.5 cm (height).
- Signature file size: 3 KB to 30 KB in JPG/JPEG.
Always verify the latest requirements on the official application website before final submission. Last verified: Verified October 2026.
Pro Tips to Prevent Form Rejection
- Use a white background with good contrast.
- Sign with black pen for crisp scanning without gray background.
Official CBSE CTET Photo & Signature Resizer Specifications & Upload Manual
Authoritative guide for Central Teacher Eligibility Test candidates: 10KB–100KB passport photo formatting, 3KB–30KB signature cleanup, and 3.5×4.5 cm aspect ratio compliance.
1CTET Candidate Photograph Specifications (10KB to 100KB)
The Central Teacher Eligibility Test (CTET), administered by the Central Board of Secondary Education (CBSE), requires hundreds of thousands of aspiring school educators to submit verified digital credentials. The CTET application portal applies automated file verification filters upon file selection. Uploads that deviate from authorized aspect ratios or file weights produce immediate validation errors.
Candidate photographs must be in JPG/JPEG format with file size strictly between 10.0 KB and 100.0 KB. The standard geometric dimensions are 3.5 cm in width by 4.5 cm in height. The photograph must be a clear portrait with 70% facial coverage against a light or white background. Candidates must face forward with a neutral expression and unblocked eye contact.
- File Size Range: 10.0 KB minimum to 100.0 KB maximum.
- Physical Dimensions: 3.5 cm (width) × 4.5 cm (height).
- Facial Coverage: 70% to 80% facial framing from forehead to chin.
- Accepted Formats: JPG / JPEG only.
2CTET Signature Scan Requirements (3KB to 30KB)
CBSE enforces distinct dimensional criteria for CTET signatures. The signature image file size must reside between 3.0 KB and 30.0 KB, with dimensions of 3.5 cm in width by 1.5 cm in height. Signatures must be executed on pure white unruled paper using a black ink ballpoint pen.
FileZenith crops your signature to exact 3.5 × 1.5 cm proportions, suppresses background paper shadows, and optimizes the compression curve to achieve a crisp 15–25 KB file weight that uploads effortlessly without rejection.
- Signature Size Range: 3.0 KB to 30.0 KB strictly.
- Dimensions: 3.5 cm (width) × 1.5 cm (height).
- Color: Crisp black or dark blue ink on clean white background.
3CBSE Gateway Upload Validation Engine & Error Code Mitigation
The Central Board of Secondary Education (CBSE) utilizes an automated server-side pre-validation script on the CTET application portal (ctet.nic.in). During document upload, this gateway inspects the incoming multipart HTTP payload against four strict binary criteria: exact byte size boundaries (photograph: 10,240 to 102,400 bytes; signature: 3,072 to 30,720 bytes), JPEG image header magic bytes (FF D8 FF), dimensional bounding ratios (3.5 cm width by 4.5 cm height for photographs), and MIME content-type headers.
If a candidate's file deviates by even a single byte—such as an image measuring 10.1 KB or 102.5 KB—the portal rejects the submission with generic error codes such as 'Invalid Image Format', 'Upload Failed: Size Out of Range', or 'Image Dimension Mismatch'. FileZenith's specialized CTET engine applies deterministic binary-search compression loops to ensure the final exported file lands squarely in the center of the permissible buffer range (e.g., ~45KB for photographs and ~15KB for signatures), guaranteeing 100% first-pass acceptance without server rejection.
- Byte Range Safeguard: Automatically targets the median buffer zone (30KB–60KB for photos, 10KB–20KB for signatures) to eliminate boundary rejection.
- MIME Header Normalization: Strips non-standard container metadata and forces compliant baseline JPEG JFIF headers (0xFFD8FFE0).
- Direct Portal Calibration: Formatted specifically for CTET July & December examination cycles administered by CBSE.
4CTET Admittance Card Biometric Facial Recognition & Exam Hall Verification
Photograph compliance for CTET is not merely an administrative portal formality—it is the foundational biometric identity record printed onto the candidate's CTET Admit Card (Hall Ticket) and Certificate of Eligibility. At the examination center, invigilators compare the printed photograph against the candidate's physical appearance and government identity proof (Aadhaar Card, Voter ID, or Passport).
Photographs featuring excessive digital beauty filtering, skewed selfie angles, heavy headwear, dark sunglasses, or poor contrast can lead to candidate disqualification or biometric mismatch flags during digital center entry. By adhering to the 3.5×4.5 cm format with a clear, neutral white background and crisp facial visibility across 80% of the image frame, candidates prevent exam-day administrative disputes and ensure smooth credential verification for subsequent teacher recruitment selections (KVS, NVS, DSSSB, and state public schools).
- Facial Frame Ratio: Calibrated for 80% vertical face coverage from crown to chin, complying with CBSE biometric guidelines.
- Neutral Contrast Profile: Balances shadows and skin tones without artificial smoothing, ensuring verifiable facial feature clarity.
- Lifetime Credential Validity: Produces clean, professional image assets that reproduce faithfully on printed CTET eligibility certificates.
Frequently Asked Questions (FAQ)
Q1.What is the photo size for CTET 2026 application form?▼
Q2.What is the signature file size and dimension for CTET?▼
Q3.Can I take a CTET photo on mobile and compress it here?▼
Q4.Is Name and Date of Photo mandatory for CTET?▼
Q5.Why does the CTET portal say 'Invalid image format or size'?▼
Q6.Can I wear religious headgear in the CTET photograph?▼
Q7.What resolution should I use for CTET signature scanning?▼
Q8.Are my files stored on FileZenith during compression?▼
Popular Government Exam & Sarkari Recruitment Portals
FileZenith’s binary-search compression engine is calibrated to the official photograph and signature submission guidelines of all major central and state government examinations:
SSC CGL, CHSL, MTS, CPO SI, GD Constable, Stenographer Grade C & D, Selection Posts (3.5×4.5 cm, 20–50 KB with Name & Date DOP).
UPSC IAS, IPS, IFS, NDA, CDS, CAPF (AC), IES, and OTR One-Time Registration (350×350 px, 20–300 KB).
IBPS PO, IBPS Clerk, IBPS RRB Scale I/II/III, SBI PO, SBI Clerk, RBI Grade B, LIC AAO (Photo 20–50 KB, Signature 10–20 KB).
RRB NTPC, RRB Group D, RRB ALP, Technician, Delhi Police, UP Police SI, Bihar Police (30–70 KB, white background).
Related Govt Exam & ID Tools
View All Govt Tools →CBSE Central Teacher Eligibility Test (CTET) Quick Specs
Official Application Portals
All image compression, dimension cropping, and name stamping occur purely inside your browser memory using HTML5 Canvas. Your biometric photos never touch our servers.