TNPSC Signature Size
Learn what TNPSC’s 230 × 75 px JPEG signature and 10–20 KB instructions mean, why white background and clear strokes matter, and how to inspect the saved file.
By TNPSC Photo · Published · Updated
Quick Answer
TNPSC Instructions to Applicants specify approximately 230 × 75 px, 10–20 KB, JPEG, with a 6.0 × 2.0 cm signature box on white paper and 200 DPI scanning as a reference. Use blue or black ink and preserve the complete signature. Verify the active recruitment notice too: the portal’s separate general resize guide gives different ranges.
What each measurement controls
Pixel dimensions describe the raster. DPI describes a scanning or printing reference and is not a substitute for pixel width and height. Our tool does not set DPI metadata; it outputs the selected pixels, JPEG format and measured bytes.
| Check | Applicant-instructions value | What to inspect |
|---|---|---|
| Dimensions | 230 × 75 pixels | Width and height of the final decoded image |
| File size | 10–20 KB | Actual saved bytes, not only a rounded preview |
| Format | JPEG / Signature.jpg | Genuine JPEG encoding, not a renamed PNG |
| Scan reference | 200 DPI; 6.0 × 2.0 cm box | Scanner setup and the applicable original instructions |
TNPSC Photo & Signature Size Guide — sources and verification
Keep source scope visible
The Instructions to Applicants source is distinct from the portal’s general guideline, which gives 200–300 px horizontally, 150–250 px vertically and below 20 KB. Group IV Notification No. 11/2026 §3.5 separately states 230 × 75 px and 10–20 KB. Consult the source applicable to your recruitment instead of combining their ranges.
Why a transparent PNG needs a white JPEG background
PNG can store transparent pixels; JPEG cannot. Converting requires a solid fill behind the strokes. White preserves the paper-like background described by the instructions and avoids a dark fill obscuring the signature. The signature tool fills transparent areas with white during export.
This does not remove shadows or cream paper already visible in a scan. Capture a clear source and crop around the complete signature with a small margin. Avoid shaving off the first or last stroke to fit a rectangle.
Why stronger compression is not always a better fix
At a small output size, thin pen strokes can lose contrast. Repeated JPEG saves can introduce artifacts around ink; processing a clearer original once is preferable to compressing each previous result. View the saved image at full size, not just as a thumbnail.
Some very simple signatures produce less than the minimum KB even at full quality. The tool reports that condition rather than adding bytes unrelated to the image. Do not assume the file must pass because it is under the maximum: compare both ends of the active range.
Before replacing a rejected signature
- Make sure you selected the signature field and read its own limit.
- Check all strokes remain inside the crop and the background is suitable.
- Confirm dimensions, JPEG encoding and actual KB after downloading.
- Reopen the final file; if the message remains unexplained, consult the portal’s official help contact.
Official sources and verification
TNPSC Instructions to Applicants — signature preparation ↗
Source type: official-applicant-instructions. Verification: verified. Last verified: .
Group IV Notification No. 11/2026 — Annexure I, §§3.3–3.6, pages 24–25 ↗
Source type: official-recruitment-notification. Verification: verified. Last verified: .
TNPSC Photo / Signature Resize Guideline ↗
Source type: official-general-guideline. Verification: verified. Last verified: .