--- title: "RRB Technician signature size" description: "Prepare RRB Technician (CEN 02/2026) signature (JPG, 30-49 KB, min 140x60 px) and SC/ST certificate PDF (under 400 KB). Photo live-captured, no upload needed." canonical: "https://sarkaridoc.com/exams/rrb-technician/" generated: "2026-09-04" --- [Home](https://sarkaridoc.com/) [Railway](https://sarkaridoc.com/exams/railway/) RRB Technician # RRB Technician Official Kit Railway Recruitment Boards (RRBs), Ministry of Railways, Government of India · 2026 Resize your signature and certificate PDF (optional) here. The photograph is taken live on the official portal (webcam or phone front camera). There is no photo file to upload. Applications 30 Jun 2026 – 29 Jul 2026 Closed Correction window 1 Aug 2026 – 10 Aug 2026 [Official rules](https://sarkaridoc.com/exams/rrb-technician/#sources) Checked 4 Sept 2026 [Portal: www.rrbapply.gov.in](https://www.rrbapply.gov.in/) RRB Technician captures your photo live on the portal — nothing to prepare here. The portal takes the photograph itself (webcam or phone front camera). What you prepare below: Signature, SC/ST certificate PDF (for Free Train Travel Pass). ### Your documents 0 of 1 files ready Signature Required JPG · min 140 × 60 px · 30–49 KB Dimensions min 140 × 60 px at 100 DPI Max size 30–49 KB Format JPG Crop Wide crop, center focus White paper background. Tap to add signature Upload signatureor pick from your device. Pasting a screenshot works too. JPG or PNG. Select file Advanced settings30–49 KB · JPG · center focus Dimensions px File size KB Format JPGPNG Reset to spec How to prepare 1. Sign in black ink on white paper using your normal running/cursive handwriting - RRB rejects block letters, capital letters and disjointed signatures. 2. Mark a 35 mm x 20 mm box on the paper, sign inside it, and scan the sheet at a minimum of 100 DPI so the signature meets the stated 140 x 60 px minimum. 3. 140 x 60 px is a stated minimum, not a fixed size - do not shrink below it even if a generic resizer defaults to an exact-size output. 4. Never submit a thumb impression in place of a signature; RRB explicitly lists this as a rejection ground for CEN 02/2026. 5. This signature must match what is captured again at CBT, Document Verification, Medical Examination and Appointment stages. Source: Official RRB CEN 02/2026 (Para 17.5.1): scan the signed paper at a minimum resolution of 100 DPI. JPG/JPEG only. File size between 30 KB and 49 KB. Image dimensions: minimum 140 x 60 pixels - this is a floor, not a maximum. The signature must be centered inside a 35 mm (width) x 20 mm (height) scan box marked on the paper before scanning. SC/ST certificate PDF (for Free Train Travel Pass) Optional PDF · up to 400 KB Max size up to 400 KB Format PDF Tap to add photo or PDF Upload sc/st certificate pdf (for free train travel pass)or pick from your device. Pasting a screenshot works too. PDF, JPG or PNG. Select file Advanced settings≤400 KB · PDF File size KB Max 100 KB 200 KB 400 KB 500 KB Reset to spec How to prepare 1. Only upload this if you are an SC/ST candidate opting for the free railway travel pass - it is not required for every applicant. 2. Use a PDF only; convert a scanned certificate into a PDF before uploading. 3. Keep the PDF under 400 KB; RRB states no minimum, so a smaller, legible scan is fine. 4. The certificate must be valid as on the CEN 02/2026 closing date (29.07.2026), not simply 'recent.' Source: Official RRB CEN 02/2026 (Para 17.5.2): SC/ST certificate for candidates requesting the free train travel pass must be uploaded in PDF format only, file size less than 400 KB. No minimum size is stated. The certificate must be the latest and valid certificate as on the closing date of online application submission. 0 of 1 files ready Download package ### Your documents 0 of 1 files ready Signature30–49 KB · JPGRequired SC/ST certificate PDF (for Free Train Travel Pass)up to 400 KB · PDFOptional Download package ## About RRB Technician RRB Technician is running as CEN 02/2026, inviting applications for 6,557 vacancies (323 Technician Grade-I Signal, 6,234 Technician Grade-III). The portal takes the application photograph live on webcam or phone. Prepare the scanned signature, plus an SC/ST certificate PDF if you want the free train travel pass. RRB Technician (CEN 02/2026) applicants preparing the scanned signature, or SC/ST applicants preparing the free train travel pass certificate PDF, for the official RRB application portal. The application photograph is captured live in the portal, not uploaded. Conducting body Railway Recruitment Boards (RRBs), Ministry of Railways, Government of India Official portal [RRB common application portal (rrbapply.gov.in)](https://www.rrbapply.gov.in/) Photo Taken live on the portal (webcam or phone front camera) ## Sources - [RRB CEN 02/2026 — Technician Grade-I Signal & Technician Grade-III](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) - [RRB common application portal (rrbapply.gov.in)](https://www.rrbapply.gov.in/) Checked 4 Sept 2026 · notice dated 30 Jun 2026 Where each rule is written Each file below links to the exact section of the official PDF where its rule is written. - [Important dates table (CEN 02/2026)](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) 4 Sept 2026 Confirms CEN 02/2026 opening 30.06.2026, closing 29.07.2026 (23:59 hrs), and Grand Total vacancies of 6,557 (323 Technician Grade-I Signal, Pay Level-5, initial pay Rs. 29,200; 6,234 Technician Grade-III, Pay Level-2, initial pay Rs. 19,900). - [Para 17.4 Live Photo Capturing of the Candidate during Application](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) 4 Sept 2026 Official text: 'Candidates are not required to upload a pre-existing photograph while applying.' 'The application module is designed to capture a live photograph of the candidate at the time of filling up the application form.' 'Live photo may be captured by web cam or by front camera (screen side camera) of the mobile phone.' An 'Important Note' warns that submitting a picture of a printed or digital pre-existing photograph will be summarily rejected. Confirms no photo-upload artifact exists for this exam's current cycle. - [signature · Para 17.5.1 Candidate Signature - Specifications for signature](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) 4 Sept 2026 Official text: 'Scan the signed paper using a minimum resolution of 100 DPI.' 'Image file format: JPG/JPEG only' 'File size: Between 30 KB and 49 KB' 'Image dimensions: Minimum 140 pixels (width) x 60 pixels (height)' 'The scanned signature must be positioned within the designated scan box on the application form: Box size: 35 mm (width) x 20 mm (height). The signature image should be centered within this box.' 140 x 60 px is a stated minimum only, no maximum given. 'Thumb impression in place of signature' is listed as a rejection ground. - [certificate PDF · Para 17.5.2 SC/ST Certificate (For Candidates Requesting Free Train Travel Pass)](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) 4 Sept 2026 Official text: 'The document must be in PDF format only.' 'File size should be less than 400 KB.' 'The certificate must be legible, clear, and easily readable.' 'It must be the latest and valid certificate as on the closing date of online application submission.' No minimum size stated; only applies to SC/ST candidates opting for the free rail travel pass. - [Para 17.7 Modification of submitted Application Details, and Para 19.0 Websites of RRBs](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) 4 Sept 2026 Official text: 'The modification window will open from 01-08-2026 to 10-08-2026.' 'Requests for modification will not be accepted after 10-08-2026.' Para 19.0 lists 21 zonal RRB websites (Ahmedabad, Ajmer, Bengaluru, Bhopal, Bhubaneswar, Bilaspur, Chandigarh, Chennai, Gorakhpur, Guwahati, Jammu-Srinagar, Kolkata, Malda, Mumbai, Muzaffarpur, Patna, Prayagraj, Ranchi, Secunderabad, Siliguri, Thiruvananthapuram) as the CEN's own application entry points, plus the centralised rrb.indianrailways.gov.in website. - Signature Read as: notice says 30 KB; stored as KiB - Signature Read as: notice says 49 KB; stored as KiB - Signature Read as: minimum only (floor) - Signature Read as: minimum only (floor) - SC/ST certificate PDF (for Free Train Travel Pass) Read as: notice says 400 KB; stored as KiB Sources checked 2 Sept 2026 · 1 unchanged, 0 changed Notice history · 1 change since Sept 2026 - 4 Sept 2026 Initial RRB Technician spec, sourced from the official CEN 02/2026 (Technician Grade-I Signal & Grade-III) detailed notification, published 30.06.2026. [View source](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments) [View the source log](https://sarkaridoc.com/sources/) ## Questions about RRB Technician What is the RRB Technician signature size? JPG, min 140 × 60 px at 100 DPI, 30–49 KB. RRB CEN 02/2026 — Technician Grade-I Signal & Technician Grade-III states this as a minimum, not a fixed size — a larger image is fine. What is the RRB Technician SC/ST certificate PDF (for Free Train Travel Pass) size? PDF, up to 400 KB, as listed in RRB CEN 02/2026 — Technician Grade-I Signal & Technician Grade-III. The source does not fix a pixel size for this file, so keep it clear and easy to read. What is the last date to apply for RRB Technician? Closing date for Submission of Online Application 29.07.2026 (23:59 hrs) (Source: [RRB CEN 02/2026 — Technician Grade-I Signal & Technician Grade-III](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments)) Can I correct my RRB Technician application form after submitting it? The modification window will open from 01-08-2026 to 10-08-2026. (Source: [RRB CEN 02/2026 — Technician Grade-I Signal & Technician Grade-III](https://rrb.indianrailways.gov.in/-/image/1783081193700Detailed_CEN_02_20262.pdf/examsDocuments)) What if RRB Technician signature upload failed? First check the current official notification. Then resize the rejected signature on this page and upload the new file on the portal. White paper background. Is this an official website? No. This is a helper page built from official sources. 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