CAT signature size & KB

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Prepare a clean white-background signature JPG for CAT on your device.

Quick answer

CAT signature: aim for 8×3.5 cm @ 150 dpi (472×207 px) · 3.15×1.38 in and 10–80 KB JPG. This tool thresholds ink onto white, then resizes and compresses in your browser.

Offline note
After assets load, many browsers (Chrome/Edge/Firefox) can keep the tool usable offline. Some browsers (e.g. Tor) or private modes block service workers — the tool still runs online without uploading your files to our servers for processing.

Make my CAT signature photo (prep)

Upload → frame with the face guide → resize to 472×207 px and compress to ≤80 KB JPG. Unofficial prep only — not uploaded to our servers for processing.

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Target checklist

  • Black/blue ink on white paper
  • Running signature (not printed name)
  • Under 80 KB JPG
  • Verify official notice

    Unofficial prep only. Specs change by year and notice. TryQuickImg is not affiliated with any government, embassy, exam board, or employer. Confirm the official bulletin before you submit — we do not guarantee acceptance.

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    Photo upload instead? CAT photo size & KB

    Other exam signature sizes: CUET · UGC NET · Kerala PSC · TNPSC · NEET · JEE Main

    How the CAT signature spec compares

    We track a signature specification for 14 exams. The CAT box is 472×207 px — about 2.3 times wider than it is tall, which is why a square crop of a signature almost always gets rejected here even when the file size is right. No other exam we track uses this exact box, so a signature prepared for a different application will need resizing rather than reuse.

    The 10–80 KB file-size band is tighter than 3 of the exams we track and looser than 10 of them. Note that it sets a minimum of 10 KB as well as a maximum. Compressing below the floor is rejected exactly like exceeding the ceiling, so aim for the middle of the band rather than the smallest file you can produce.

    Disclaimer: the official CAT notice always overrides these prep targets.

    Frequently asked questions

    What size should my CAT signature be?

    Common prep target: 8×3.5 cm @ 150 dpi (472×207 px) · 3.15×1.38 in and 10–80 KB JPG on a white background. Confirm the current CAT notice — rules change by year.

    How does white-background cleanup work?

    The tool thresholds dark ink onto pure white in your browser so scanned signatures look portal-ready. The image is not uploaded to our servers for processing.

    Is my signature uploaded?

    No. TryQuickImg processes the image locally — not uploaded to our servers for processing. After the page loads you can go offline and still finish.

    Where this spec comes from

    These figures are commonly-cited ranges, read from the official notice by hand and re-checked on a set date — nothing here is scraped, so a number never changes without a person confirming it. The notice for your own exam year always wins.

    CAT signature spec — CAT official notice

    Checked 2026-08-03 · next re-check due 2027-08-03

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