Compress Image to 15 KB

Reduce an image to 15 KB — the comfortable middle of the 10–20 KB window most signature uploads specify.

Supports JPEG, PNG, WebP, GIF, BMP and more — up to 50 MB

How to compress an image to 15 KB.

The target is preset, so this takes three steps — plus what to expect at 15 KB.

1
Step 1

Upload your image

Click upload or drag and drop any JPEG, PNG, WebP, SVG, or GIF file from your device.

2
Step 2

Target is already set to 15 KB

This page is preset to 15 KB, so there is nothing to type. Choose JPEG or WebP output for the most efficient result at this size.

3
Step 3

Compare, then download

Press compress and check the result against your original in the slider. Roughly 550 × 550 px is the realistic pixel budget at 15 KB — download when it looks right.

Getting the best results

Aim for the middle of a stated range

A form asking for 10–20 KB is describing a window, not a maximum. Landing at 15 KB gives you margin on both sides, so a re-upload after a minor edit will not suddenly fall outside the limit.

Trim the whitespace around a scan

Scanned signatures usually sit in a large margin of blank paper. Cropping tight to the ink costs nothing visually and hands the saved bytes back to the part of the image that matters.

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Compressing an image to 15 KB.

What 15 KB is actually for, what it can hold, and how to get there without wasting quality.

What 15 KB is good for

15 KB is where a lot of upload forms actually want you to land. When a portal states a 10 KB to 20 KB range, the midpoint is the safest target: far enough above the floor that the scan does not look degraded, far enough below the ceiling that rounding differences never push you over.

It is also a practical size for interface graphics. At 15 KB you can serve a small illustration or an icon set without it registering against a page-weight budget, which matters when a page has dozens of them.

Where this size is required

Signature and thumb-impression scans that specify a 10–20 KB range, small illustrations in a user interface, and avatar images on forums and comment systems that cap uploads tightly.

What to expect at 15 KB

Document scans and signatures come out clean with room to spare. Photographs reach roughly 550 × 550 pixels before artefacts show, which is enough for a small profile picture but not for anything viewed at full width.

Frequently asked questions.

Everything you need to know about compressing images to 15 KB.

It is generous for a signature and tight for a photograph. Most portals set separate limits for the two — commonly 10–20 KB for the signature and 20–50 KB for the photo — so check which field you are filling before targeting 15 KB.

No. If it already meets the requirement and looks acceptable, compressing again only discards detail for no benefit. Compression is worth running when you need to come down, not as a routine step.

For a signature or a short handwritten line, comfortably. For a full page of body text, no — a document scan needs roughly ten times this budget to keep small print legible.

Yes. The tool runs in the mobile browser, so you can select a photo from your camera roll, compress it to 15 KB, and upload it to a form without installing anything.

Considerably. JPEG suits photographic content while PNG suits the ink-on-paper look of a signature. At this size the wrong choice is the difference between crisp and smudged.

For a photographic JPEG, roughly 550 × 550 px is the practical ceiling before compression becomes visible. Flat graphics, screenshots, and document scans do considerably better, because they contain less fine detail to preserve.

No. Images are processed on our secure server only to perform the compression and are deleted immediately after your download. They are never stored, shared, or accessed by anyone.