Compress image to 15 KB

Shrink your JPG or PNG to 15 KB online — free, no signup, 100% in your browser. The target is preset to 15 KB, so just upload and download.

15 KB targetJPG / PNG supportedBest for Signatures🔒 No upload
📁 Drop your image here, or click to choose (JPG / PNG)

Where a 15 KB limit is used

A 15 KB limit is most often used for signatures and small scanned marks on many online forms. A 15 KB cap is common for signatures and other small line images on many online application portals. It gives a little more room than 10 KB while keeping the file tiny.

Tip for hitting 15 KB cleanly

If your signature is just over the limit, crop out the white margins first — removing empty space shrinks the file far more than dropping quality does.

⚠️ File-size rules vary between forms and change between exam cycles — always confirm the exact limit in the official notification before you upload.

Frequently asked questions

Why does my signature exceed 15 KB?
Usually because the scan includes a lot of white background or was saved as PNG. Crop tightly and save as JPG, then compress — both steps bring a signature well under 15 KB.
How do I compress an image to 15 KB?
Upload your photo above — the target is already set to 15 KB. Click Compress and the tool lowers the quality just enough to bring the file at or under 15 KB, then lets you download it. Nothing is uploaded to a server.
Will the image still be clear at 15 KB?
The tool keeps the highest quality possible while meeting the 15 KB limit. For signatures and small scanned marks on many online forms, 15 KB is enough to stay clear; very small targets naturally soften the image more.
Is it free and private?
Yes — completely free, no signup, no watermark, and the compression runs entirely in your browser so your file never leaves your device.

By Narender Chaudhary, Editorial & Product Lead · Updated June 2026

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