TNPSC Signature Compressor 2026 – Size, Exact Dimensions, KB Limit & Fixing Upload Errors

If your TNPSC OTR application is stuck on the signature upload step, you’re dealing with one of the most common last-mile errors in the entire registration process. Unlike your photo, your signature has a much tighter file-size window — which means even a slightly-too-large scan will bounce back with an error. This guide covers the exact TNPSC signature size requirement, why signature uploads fail more often than photo uploads, and how to fix it using a TNPSC signature compressor.

TNPSC Application – Why Signature Uploads Fail More Often Than Photos

Your signature file has a narrower KB range than your photo — typically 10 KB to 20 KB, compared to 20–50 KB for the photo. That’s a tighter margin to hit, and most scanned or photographed signatures come in at several hundred KB or more straight out of the camera. On top of the size problem, signatures are small, detail-sensitive images — over-compress it even slightly and the ink strokes blur into illegible smudges, which can itself cause rejection at the verification stage later, even if the upload technically goes through.

TNPSC Signature Size Specification – OTR Portal

Before finalizing your signature file, always check the exact dimension printed in the current notification PDF for the specific exam you’re applying to — don’t assume last year’s spec still applies.

TNSPC 2026 – How to Prepare Your Signature Correctly (Before You Even Compress It)

Getting the compression right starts before you open any tool:

1. Sign on plain white, unruled paper — using a black or dark blue ballpoint pen, not a gel pen or marker that bleeds ink.
2. Sign naturally — your normal, everyday signature style. Signing in all-capital block letters is a common and entirely avoidable rejection reason.
3. Keep the signature box reasonably sized — roughly matching the 3.5 cm x 1.5 cm target area so you’re not cropping out important strokes later.
4. Photograph or scan it in good, even light — avoid shadows falling across the signature, since shadows compress into visible noise and can make the file harder to clean up later.

How to Use a TNPSC Signature Compressor – Step-by-Step

1. Take a clear photo or scan of your signature on white paper.
2. Crop tightly around just the signature — remove excess white space so the aspect ratio is closer to 3.5:1.5 before resizing.
3. Upload to a signature compressor tool and set the target dimension (3.5 cm x 1.5 cm, or the specific dimension listed in your notification) and file size range (10–20 KB).
4. Check the output for legibility — zoom in on the compressed result before uploading. If your signature looks blurred or the strokes have merged, the compression is too aggressive; try a slightly higher KB target within the allowed range (closer to 20 KB rather than 10 KB).
5. Rename the file if required — some TNPSC notifications specify an exact filename convention; check this before uploading rather than after an error.
6. Verify the final KB size manually — check file properties on your device rather than trusting only the tool’s on-screen preview.

Common TNPSC Signature Compressor Errors & Fixes

TNPSC Signature vs Photo: Quick Comparison

Signature specifications can vary between different TNPSC recruitment notifications and may be revised over time. Always confirm the exact dimension and file-size requirement printed in your specific exam’s official notification PDF on tnpsc.gov.in before finalizing your signature upload.