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TNPSC Signature Size (230 × 75 px, 10–20 KB): How to Make a Clean Signature File

How to sign, photograph and crop your signature so it stays sharp at TNPSC's 230 × 75 px and 10–20 KB, plus fixes for faint strokes, grey paper and PDF signatures.

· 5 min read

The TNPSC signature file is 230 × 75 px, 10–20 KB, JPG, saved as Signature.jpg. The notice writes this as 6.0 × 2.0 cm and asks for blue or black ink on white paper. The numbers are easy. Keeping a signature readable at 75 pixels high is the hard part.

Sign for a small, wide box

The file is roughly three times wider than it is tall. Sign so your signature already has that shape:

  • Draw a light 6 × 2 cm box on a plain white sheet, not ruled or coloured paper, and sign inside it at your normal size.
  • Use a dark ballpoint or gel pen. Pencil and pale blue ink thin out to almost nothing when reduced.
  • Leave some white space around it, so you can crop cleanly.

Photograph it flat and evenly lit

A flatbed scan at 200 DPI is ideal, but a phone photo works if you:

  1. Lay the paper flat near a window in daylight.
  2. Hold the phone straight above the page, keeping your own shadow off the paper.
  3. Fill most of the frame with the signature and check that it's in focus.

Shadow is the main enemy. A grey corner or gradient on the paper becomes a dirty smear at 230 × 75 px.

Crop tight, then resize

In the tool, switch to Signature, choose your image and use Crop adjustments to frame just the signature with a small margin. Rotate it if the photo is sideways. Prepare signature then resizes and compresses it to 10–20 KB.

Crop before resizing. If you resize a square photo straight to 230 × 75 px, the signature gets squashed flat. If you leave a wide margin, the signature itself ends up tiny in the middle of a white strip.

Fixing common signature problems

Strokes look broken or faint. Sign again with a darker, thicker pen. Lowering compression won't add back ink that was too thin to begin with.

The paper looks grey. The tool doesn't whiten paper. Re-photograph it in even daylight. It is a two-minute fix and gives a far better result than an editing app.

Your signature is in a PDF. TNPSC wants a JPG, and renaming the file won't convert it. Screenshot the signature from the PDF, or export the page as an image, then prepare it.

The background turned black. This happens when a transparent PNG cut-out is saved as JPEG. The TNPSC tool fills transparent areas with white automatically. Other converters may not.

Over 20 KB. The file wasn't resized to 230 × 75 px, or it was saved as PNG. Under 10 KB: it was compressed more than once. Start from the original photo. The tool tops up a very simple signature to the 10 KB minimum without changing it.

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