Does this tool support left thumb impressions?

Yes. Left thumb impressions follow the same size guidelines (usually under 20KB) and clean background requirements as signatures. You can crop, clean, and compress them here.

What color ink should I use for signatures?

Most portals prefer black or blue ink on plain white paper. Avoid ruled paper or background shadows, as automated screening systems might reject them.

Will my signature lose its original lines?

No, the image compression algorithms preserve line outlines while shrinking the solid background data to keep the file size minimal.

What size should the UPSC signature file be?

The UPSC signature file must be between 10KB and 20KB in JPEG format. If your scanned signature is larger, use our Signature Compressor to bring it within the 20KB limit.

Can I use a digital signature for UPSC?

No. UPSC requires a handwritten signature on plain white paper, scanned and uploaded as a JPEG. Digital or typed signatures are not accepted.

What are the dimensions for the UPSC signature?

The signature must be between 350x350 pixels and 1000x1000 pixels in a square or proportional layout.

What ink should I use for my signature?

You must use either a black or dark blue ink pen on plain white paper without any lines.

Compress Signature for UPSC Signature

Optimize signatures and fingerprints under strict size limits. Clean background contrast and scale dimensions.

Official Requirements for UPSC Signature

To ensure your signature is accepted by the India official platform, it must meet the following strict criteria:

Maximum File Size: 20 KB
Signature must be between 10KB and 20KB.
JPEG format only.
Minimum 350×350 pixels.
Signature must be on white paper using black or blue ink.
No digital signatures — must be a scanned handwritten signature.

Disclaimer: These requirements are verified based on official guidelines. However, platform rules and guidelines can change. Always consult the official UPSC Signature portal before final submission.

Common Rejection Reasons

File size outside the 10KB–20KB range.
Digital or typed signature (not handwritten).
Low contrast — signature not visible against background.
Cropped or incomplete signature.

Official Guidelines Compliance

UPSC Signature Resizer & Compressor

Signature and left thumb impression uploads on exam portals usually have strict requirements, requiring files to be between 10KB and 20KB. Furthermore, shadow-heavy phone camera scans can result in low-contrast signatures which get rejected. Our tool lets you resize dimensions, increase contrast to create a clean white background, and compress files securely to ensure compliance under 20KB. The Union Public Service Commission uses strict optical character recognition algorithms, meaning illegible or incorrectly sized signature scans will halt your exam application. This dedicated signature processor swiftly adjusts your scanned autograph to the exact 350x350 pixel minimum while locking the file size between 20 KB and 300 KB.

How to Use Compress Signature for UPSC Signature

Follow these simple steps to ensure your file meets all requirements for UPSC Signature.

Upload Signature Scan - Step 1

Select the photo of your signature or thumb impression (captured on plain white paper). Sign clearly on completely blank white paper using a dark blue or black ink pen.

Adjust Scale & Contrast - Step 2

Clean up background shadows and scale to standard dimensions (e.g., 350x350 pixels or 140x60 pixels). Scan and upload the signature, then use the cropping tool to remove all excess white space around the text.

Download Signature JPG - Step 3

Preview the file size to verify it is under 20KB, then download the optimized signature. Save the resized JPEG, confirming it fits perfectly within the UPSC 20-300 KB weight restrictions.

Frequently Asked Questions about UPSC Signature

Answers to common questions regarding requirements for UPSC Signature.

Does this tool support left thumb impressions? Yes. Left thumb impressions follow the same size guidelines (usually under 20KB) and clean background requirements as signatures. You can crop, clean, and compress them here.: Yes. Left thumb impressions follow the same size guidelines (usually under 20KB) and clean background requirements as signatures. You can crop, clean, and compress them here.
What color ink should I use for signatures? Most portals prefer black or blue ink on plain white paper. Avoid ruled paper or background shadows, as automated screening systems might reject them.: Most portals prefer black or blue ink on plain white paper. Avoid ruled paper or background shadows, as automated screening systems might reject them.
Will my signature lose its original lines? No, the image compression algorithms preserve line outlines while shrinking the solid background data to keep the file size minimal.: No, the image compression algorithms preserve line outlines while shrinking the solid background data to keep the file size minimal.
What size should the UPSC signature file be? The UPSC signature file must be between 10KB and 20KB in JPEG format. If your scanned signature is larger, use our Signature Compressor to bring it within the 20KB limit.: The UPSC signature file must be between 10KB and 20KB in JPEG format. If your scanned signature is larger, use our Signature Compressor to bring it within the 20KB limit.
Can I use a digital signature for UPSC? No. UPSC requires a handwritten signature on plain white paper, scanned and uploaded as a JPEG. Digital or typed signatures are not accepted.: No. UPSC requires a handwritten signature on plain white paper, scanned and uploaded as a JPEG. Digital or typed signatures are not accepted.
What are the dimensions for the UPSC signature? The signature must be between 350x350 pixels and 1000x1000 pixels in a square or proportional layout.: The signature must be between 350x350 pixels and 1000x1000 pixels in a square or proportional layout.
What ink should I use for my signature? You must use either a black or dark blue ink pen on plain white paper without any lines.: You must use either a black or dark blue ink pen on plain white paper without any lines.

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