Resize Signature for Online Exam Forms

Exact KB + pixel targeting for every major exam portal — with a built-in UPSC triple-signature composer.

100% in your browser — files never uploaded

Resize signature to 10KB–20KB for SSC (CGL, CHSL, GD, MTS)

SSC portals accept signatures only in JPG/JPEG between 10KB and 20KB, scanned at roughly 4.0cm × 2.0cm — about 236 × 79 pixels. Sign with a black ink pen on plain white paper, photograph or scan it, and this tool crops to the exact aspect ratio, flattens the background to pure white, and compresses into the 10–20KB window. Files under 10KB get rejected as over-compressed; over 20KB the portal refuses the upload — the KB-range targeting handles both edges automatically.

UPSC signature size: 20KB–100KB at 350×350 pixels

UPSC CSE requires the signature image between 20KB and 100KB with dimensions in the 350–500 pixel range, black ink on white paper. From the 2026 cycle UPSC asks candidates to sign three times one below the other and scan all three as a single image. Always cross-check the exact figures in your cycle's official notification PDF before submitting.

UPSC triple signature maker — one signature, stacked 3×, one JPG

Don't have a scanner or a clean three-signature sheet? Select the UPSC preset, switch on the Triple-Signature Composer, and upload one clear signature. The tool stacks it three times vertically with even white spacing, then exports a single JPG within 350–500 pixels and 20–100 KB — exactly the one-image, three-signatures format the UPSC portal expects, named signature.jpg. Everything runs in your browser; the signature never leaves your device.

SBI PO signature size: 140×60 pixels, 10KB–20KB

SBI PO 2026 (Advt. CRPD/PO/2026-27/09, apply by 8 July 2026) accepts the signature only as a JPG between 10KB and 20KB at 140 × 60 pixels — signed with a black ink pen on white paper. Critically, signatures in CAPITAL LETTERS are not accepted; sign in your normal running hand, and use the same signature at the exam hall, because a mismatch against the call letter means disqualification. The SBI preset here crops, resizes and compresses to the exact spec from the official notification's Annexure-II.

NEET signature upload: 4KB–30KB in JPG

NTA accepts the NEET UG signature between 4KB and 30KB in JPG format, full signature in running letters with a black ballpoint pen. The NEET preset targets this range while keeping stroke edges sharp — the grayscale and contrast boost makes thin pen lines survive heavy compression instead of dissolving into the white background.

RRB signature size: 10KB–70KB — and why there's no photo upload

The latest RRB cycles (NTPC and Group D) accept the signature as a JPG/JPEG between 10KB and 70KB at approximately 5.0cm × 2.0cm, signed in running hand — signatures in capital letters are rejected outright. Note that your photograph is no longer uploaded at all: the application module captures it live through your webcam or phone camera, and applications made with a pre-existing photo are rejected. That makes the signature the only image file you prepare for an RRB form. Older cycles used a tighter 10–20KB window, so cross-check the annexure of your specific CEN before submitting — the RRB preset here carries the latest-cycle figures.

SSC GD signature size: 10KB–20KB at about 4×2cm

SSC GD Constable forms accept the signature as a JPG/JPEG between 10KB and 20KB at roughly 4.0cm × 2.0cm, black or blue ink on white paper, covering most of the signature box in your normal running hand. Like RRB, the photograph is captured live inside the application module on ssc.gov.in — pre-existing photos are rejected per the official Notice — so the signature is the only file upload. The 2026 window closed on 31 December 2025; the next notification is expected around September 2026, and the preset will be re-verified against its annexure the day it publishes.

CTET signature size: 3KB–30KB at 3.5cm × 1.5cm

The CBSE CTET Information Bulletin specifies the signature in JPG/JPEG format between 3KB and 30KB, with dimensions of 3.5cm (length) × 1.5cm (height). Sign on plain white paper with black or blue ink and crop tight around the signature — loose crops shrink the actual signature so much it becomes illegible at the portal's dimensions. The 3KB floor matters: over-compressed or tiny files get rejected as unreadable, and the KB-range targeting here keeps the file inside both edges automatically.

How the KB targeting works

The tool binary-searches JPEG quality until the output lands inside your target KB range, after resizing to the exact pixel dimensions your exam demands. Everything runs in your browser via the Canvas API — your signature never leaves your device, which matters for a document that authenticates your identity on a government portal.

Signature Scan Requirements Across Indian Exam Portals

Every major recruitment and entrance portal — SSC, UPSC, SBI, RRB, NEET, CTET — asks for the same underlying thing: a scanned signature in running hand, black or blue ink on plain white paper, saved as JPG within a specific KB and pixel window. The window itself differs by portal (SSC and SSC GD sit around 10–20KB, NEET runs 10–100KB, UPSC 20–100KB), which is why a signature that clears one portal often gets rejected by another. Selecting the matching preset here applies the correct crop ratio, dimensions and compression target in one pass, instead of guessing at generic export settings.

Why UPSC Now Wants Three Signatures in One Image

From the 2026 cycle, UPSC CSE asks candidates to sign three times one below the other and upload all three as a single JPG between 20KB and 100KB, sized in the 350–500 pixel range — a format change that trips up candidates using an old single-signature scan. The built-in Triple-Signature Composer removes the need to redo the physical signing: upload one clean signature and it stacks three evenly spaced copies into a single compliant image automatically, matching the exact one-file, three-signature layout the portal now expects.

The Three Reasons Portals Reject a Signature Upload

Rejections almost always trace to one of three causes: the file sits outside the required KB range, the pixel dimensions or aspect ratio don't match the spec, or the format isn't JPG. Several portals add a fourth silent rejection — signatures written in capital letters instead of a normal running hand, which SBI PO and RRB explicitly disallow. This tool fixes the file-side problems in one step by cropping to the exact ratio and binary-searching JPEG quality until the size lands inside the target window; the handwriting itself is on the candidate.

Frequently asked questions

What is the correct signature size for SSC CGL 2026?

10KB to 20KB in JPG/JPEG format, approximately 4.0cm wide × 2.0cm high (about 236 × 79 pixels). Sign with black ink on white paper. Blurred or miniature signatures are rejected.

What is the UPSC signature size limit?

20KB to 100KB, with image dimensions in the 350–500 pixel range. UPSC 2026 onwards requires three signatures signed one below the other, scanned as a single image. Verify against your notification PDF.

How do I make the UPSC triple signature image?

Either sign three times one below the other on white paper and scan it as one image, or upload a single signature to this tool with the Triple-Signature Composer enabled — it stacks the signature 3× vertically and exports one compliant JPG (350–500 px, 20–100 KB) automatically.

What is the signature size for SBI PO 2026?

140 × 60 pixels, JPG format, between 10KB and 20KB — black ink on white paper, per the official notification's Annexure-II. Capital-letter signatures are rejected. Registration closes 8 July 2026.

What signature size does NEET accept?

4KB to 30KB in JPG format. Sign in full running letters with a black ballpoint pen on white paper — initials or capital-letter signatures can be treated as invalid.

What is the RRB NTPC signature size?

Latest cycle: 10KB to 70KB in JPG/JPEG at about 5.0cm × 2.0cm, running hand — capital letters are rejected. Older cycles used 10–20KB, so verify your CEN's annexure. The photo itself is captured live on the portal, not uploaded.

Do I upload a photo for RRB or SSC GD forms?

No. Both portals now capture your photograph live through a webcam or phone camera during the application, and reject pre-existing photos. The signature is the only image file you prepare and upload.

What is the SSC GD signature size?

10KB to 20KB in JPG/JPEG at roughly 4.0cm × 2.0cm, black or blue ink on white paper, running hand. Verify against the annexure when the next SSC GD notification publishes (~September 2026).

What is the CTET signature size?

3KB to 30KB in JPG/JPEG at 3.5cm × 1.5cm, per the official CBSE CTET Information Bulletin. Handwritten in black or blue ink on white paper, cropped tight around the signature.

Why does the portal keep rejecting my signature file?

Almost always wrong KB range, wrong aspect ratio, or a non-JPG format (PNG/PDF/HEIC). This tool fixes all three in one pass: exact pixels, JPG output, and compression targeted inside the required KB window.

Is my signature uploaded to a server?

No. All cropping, resizing, and compression happen entirely in your browser. The file never leaves your device.

Signature ka size kam kaise kare?

Pick your exam preset, upload a photo of your signature on white paper, and download — the tool crops to the exact pixel spec and compresses inside the required KB window automatically.

Signature 20KB me kaise banaye?

Choose the SSC preset, which targets the 10KB–20KB window SSC portals accept, upload your signature and download. The tool binary-searches JPEG quality until the file lands inside the range.

Data verified: 2026-07-02 · All processing happens in your browser — no files are ever uploaded.