How small do the dimensions have to go to fit {{kb}} KB?

Around {{pw}} by {{ph}} for a detailed photograph, and much larger — around {{fw}} by {{fh}} — for a signature or a flat scan. The tool measures your file instead of guessing.

Resize an image to 30 KB

Set to 30 KB already. Choose a photo and the tool shrinks the frame — and the quality if it has to — until the file sits just under 30 KB.

Choose an image or drag one onto this box — JPG, PNG, WebP, GIF or HEIC

Target size KB Maximum width If quality alone cannot get there

Choose an image and it will be compressed here, in this browser. Nothing is uploaded.

Your image is never uploaded. Compression runs in this browser using the canvas API, and there is no server to send it to. This tool is provided free and without warranty — open the result before you submit it anywhere.

What 30 KB means in pixels

30 KB is the size people type when a form says "photo under 50 KB" or "image not more than 100 KB" and they want to know the frame, not the JPEG slider. A passport-style picture at sensible dimensions usually fits; a phone photo at full resolution does not, until the width comes down.

Why shrinking the frame beats crushing the quality

A 4000-pixel phone photo forced into 30 KB on quality alone turns to mush, because there are too many pixels to describe. Dropping the width first — 800, 600, 400 — keeps edges readable. The tool does that when quality alone cannot get under the limit.

Your image is never uploaded

The resize happens in your browser. The image is never transmitted, never stored, and disappears when you close the tab — which matters, because a file with a size limit attached is usually an identity document.

What fits inside 30 KB

A JPEG spends bytes on detail, so the number of pixels 30 KB can hold depends entirely on how busy the picture is. These are the rough budgets, and they are why a signature can stay large while a photograph of the same size limit has to shrink.

Kind of image	Pixels it can afford	Roughly, at 4:3
Signature or line drawing	614,400	about 910 × 680
Passport or ID photo	256,000	about 580 × 440
Scanned document page	153,600	about 450 × 340
Detailed photograph	93,091	about 350 × 260

Estimates from typical JPEG output at everyday quality. A detailed photograph gets about 93,091 pixels to work with at 30 KB — near enough 350 × 260. Anything bigger has to give up either dimensions or detail, and dimensions are almost always the better thing to give up.

Common questions

How do I resize a photo to 30 KB?

Choose the file on this page. The target is already 30 KB. The tool drops quality first and then the dimensions, so the file lands just under the limit instead of overshooting a form that will reject it.

What width and height fit in 30 KB?

It depends on how busy the picture is. A detailed photograph needs fewer pixels than a signature at the same file size. The table on this page is the working estimate; the tool measures your actual file.

How small do the dimensions have to go to fit 30 KB?

Around 350 by 260 for a detailed photograph, and much larger — around 910 by 680 — for a signature or a flat scan. The tool measures your file instead of guessing.

Why does the resized file sit just under 30 KB instead of on it?

Because the form rejects anything over 30 KB. The tool treats the number as a ceiling and stops once it is close, rather than risking an overshoot that gets the upload bounced.