Signature Size Checker
Not sure if your signature will pass the portal's upload requirements? Drop it here to check dimensions, file size, format, and aspect ratio - before you submit and risk rejection.
Drop your signature image here or click to browse
What gets checked
Dimensions (width x height)
Most exam portals require exactly 140x60 px. Even 1 pixel off can trigger a rejection.
File size (KB)
SSC requires 10-20 KB. IBPS allows 10-20 KB. UPSC goes up to 30 KB. Going over = instant rejection.
Format (JPG/PNG)
Almost every portal requires JPEG (.jpg). PNG, HEIC, and WebP files are rejected silently by many forms.
Aspect ratio
A signature that is too tall or too square suggests excess whitespace. The expected ratio is approximately 2.3:1.
Failed the check? Fix it instantly
Complete Guide to Checking & Verifying Exam Signatures Online
Digital signatures serve as the official legal authentication method on government job applications, competitive examination admit cards, and banking recruitment portals. Because millions of applications are processed automatically through Optical Character Recognition (OCR) and automated portal scripts, recruitment boards enforce strict validation checks on uploaded signature files. Even a minor discrepancy in pixel dimensions, aspect ratio, file size in KB, or image format will cause an application form to reject your file instantly.
Our free Signature Size Checker acts as a comprehensive pre-flight verification tool. By simulating the exact validation logic employed by official government application portals, it inspects your file across four critical dimensions: pixel width and height, total storage size in kilobytes, aspect ratio proportion, and MIME file container format.
boltQuick Solution (TL;DR)
Simply drag and drop your signature image into the inspection box above. Within milliseconds, the tool checks whether your signature meets standard exam specifications (such as exactly 140 x 60 pixels, 10 KB to 20 KB file size, and JPEG format). If any parameter fails verification, one-click links guide you to our dedicated fixing tools to crop, resize, or compress your signature immediately.
When Should I Use This Tool? (Exam-Specific Use Cases)
Always run your signature through this pre-check before starting application registration for any major examination:
- SSC (Staff Selection Commission - CGL, CHSL, MTS, GD Constable): SSC forms demand a signature sized between 10 KB and 20 KB with dimensions of 140 x 60 pixels. Signatures that are blurry, vertical, or exceed 20 KB are rejected by the application server.
- IBPS (Banking PO, Clerk, SO, RRB): IBPS notifications strictly require signatures signed in black ink on white unruled paper, sized between 10 KB and 20 KB at 140 x 60 pixels. Blue ink or dark background scans often lead to disqualification during verification.
- UPSC (Civil Services CSE, NDA, CDS, CAPF): UPSC portals allow signatures between 20 KB and 30 KB with pixel dimensions ranging from 350 x 350 to 1000 x 1000 pixels. Our checker verifies that your file stays strictly within these boundaries.
- Railway Recruitment Board (RRB NTPC, ALP, Group D): RRB portals enforce a 10 KB to 20 KB requirement with clear horizontal proportions so signatures fit neatly inside admit card signature boxes.
- State Public Service Commissions (TSPSC, APPSC, UPPSC, MPSC): State portals frequently check aspect ratio alongside file size to ensure candidate signatures do not appear squished or illegible on printed hall tickets.
Examples: Before & After Scenarios
A candidate photographs their signature signed on notebook paper using a smartphone. The file is a 2.4 MB PNG image measuring 3000 x 1500 pixels. The portal throws: "Error: Signature file size must not exceed 20 KB and format must be JPG."
The candidate checks the file here, identifies the PNG format and oversize KB error, and uses our linked 140x60 Signature Maker. The resulting 15 KB JPEG passes all four verification checks and uploads smoothly on the first attempt.
Troubleshooting Common Upload Rejections
- "Aspect ratio out of range": If your signature image is square (1:1) or taller than it is wide, portals reject it because signatures must be horizontal. Crop excess whitespace above and below your ink strokes using our Signature Cropper.
- "Invalid file type": Even if your file is named
signature.jpg, if it was originally saved as a WebP or PNG without proper re-encoding, portal headers will reject it. Convert cleanly to true JPEG format. - "Image too blurry or illegible": Avoid compressing a tiny 5 KB signature down even further. Ensure your signature is signed with a thick black ballpoint pen on bright white paper before scanning.
Best Practices for Exam Signature Uploads
- Always sign on plain white, unruled paper using a black ink pen for maximum contrast and scanner readability.
- Crop tightly around the ink strokes leaving only a 2-3 pixel margin before resizing to 140 x 60 pixels.
- Verify your signature file on desktop before submitting your final exam application form.
Privacy & Browser Compatibility
This Signature Size Checker executes entirely within your web browser using client-side JavaScript image decoding and File API inspection. Your signature is never uploaded to any remote server or stored in any external database. All checks happen instantaneously on your own device, guaranteeing complete security and privacy for your official legal signature. The tool operates smoothly on Google Chrome, Firefox, Safari, Microsoft Edge, and all mobile web browsers.
Frequently Asked Questions
What is the correct signature size for SSC?
SSC CGL, CHSL, and MTS exams require signatures to be exactly 140x60 pixels, between 10KB and 20KB, in JPEG format. Use this checker to verify all three requirements before uploading.
Why does the portal reject my signature even though the file size is correct?
File size is only one of several checks. Portals also validate dimensions (width x height), format (JPG only), and sometimes aspect ratio. A file can be under 20KB but still fail because it is 200x100 px instead of the required 140x60 px.
Is this checker accurate for all exams?
The checker uses the most common requirements for SSC, IBPS, UPSC, and RRB exams. However, always verify against the specific exam notification, as some portals occasionally change their requirements.
Does this tool upload my signature anywhere?
No. The checker runs entirely in your browser. Your signature file never leaves your device - no upload, no storage, no server processing. 100% private.