Compress Signature to 20KB

Q: What file size should a signature be for exam forms?

Usually 10–30KB, with 20KB a common target. Check your specific exam's notification — signatures are almost always smaller than the photo limit.

Q: How do I keep my signature readable at 20KB?

Crop tightly to the signature, use black or blue ink on white paper, and let the tool compress from there. Line art stays crisp at small sizes when it is cropped and high-contrast.

Q: JPG or PNG for a signature?

Whichever your portal accepts. JPG is most widely required; PNG can keep the lines slightly sharper for high-contrast line art if it is allowed.

Q: My signature has a grey or shadowed background — will it pass?

Clean it up first so the background is plain white (or transparent), then compress. A shadowed background both looks bad and wastes file size.

Compress a scanned signature to 20KB (or 10–30KB) for exam and application forms. Keeps ink lines crisp on a clean white background. Free, no signup.

Drag & Drop your image here

or click to browse or paste (Ctrl+V)

JPGPNGWEBPHEIC

⚡ Try with a sample photo

A signature upload is its own little puzzle. Exam and application portals want it tiny — usually somewhere in the 10–30KB range, with 20KB a common target — and they want it on a clean white background with the ink lines still readable. A photo of a signature straight off your phone is far too big and often too dark at the edges, so it gets rejected.

Tuned for line art, not faces

This tool is tuned for exactly that: upload your scanned or photographed signature and it compresses to around 20KB while protecting the thing that matters — the sharpness of the strokes. Signatures are line art, so they hold up well at small sizes as long as the compression does not smear the edges. Export as JPG if your portal asks for JPG (most do); if it accepts PNG, PNG can keep the lines even crisper for this kind of high-contrast image.

Two things that make it pass first time

Sign on plain white paper with black or blue ink, and crop tightly to the signature so there is no wasted margin — a tight crop means more of your 20KB goes to the strokes themselves. If your form also needs the signature to be a specific pixel size (often around 140×60px), resize to that first, then compress here. Need to clean up a grey or shadowed background first? Run it through the background remover to get a clean white or transparent backdrop, then come back here to hit the file-size limit.

Common ways people use it

Exam & job-form signatures

Meet the tiny 10–30KB signature cap on recruitment and application portals that reject larger files.

Photo & signature pairs

Prepare the matching passport photo on the 20KB photo compressor for the same form.

Contracts & documents

Shrink a scanned signature to a small, crisp file to drop into a PDF or online agreement.

Frequently asked questions

What file size should a signature be for exam forms?

How do I keep my signature readable at 20KB?

JPG or PNG for a signature?

My signature has a grey or shadowed background — will it pass?

How It Works

Professional results in 3 simple steps.

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