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 500 KB

Set to 500 KB already. Choose a photo and the tool shrinks the frame — and the quality if it has to — until the file sits just under 500 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 500 KB means in pixels

500 KB still has a frame. It is large enough for a full-width web image or a detailed photograph at moderate dimensions, so most pictures reach it by giving up a little width rather than being crushed. The number on the form is still a ceiling, not a target to hit exactly.

Why shrinking the frame beats crushing the quality

A 4000-pixel phone photo forced into 500 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 500 KB

A JPEG spends bytes on detail, so the number of pixels 500 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	10,240,000	about 3,700 × 2,780
Passport or ID photo	4,266,667	about 2,390 × 1,790
Scanned document page	2,560,000	about 1,850 × 1,390
Detailed photograph	1,551,515	about 1,440 × 1,080

Estimates from typical JPEG output at everyday quality. A detailed photograph gets about 1,551,515 pixels to work with at 500 KB — near enough 1,440 × 1,080. 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 500 KB?

Choose the file on this page. The target is already 500 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 500 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 500 KB?

Around 1,440 by 1,080 for a detailed photograph, and much larger — around 3,700 by 2,780 — for a signature or a flat scan. The tool measures your file instead of guessing.

Why does the resized file sit just under 500 KB instead of on it?

Because the form rejects anything over 500 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.