Resize an image to 300 × 400 pixels

300 × 400 pixels is a portrait 3:4 size, often used for 3:4 portrait photos for online applications. Choose your photo, place it in the frame and download a JPG that is exactly 300 × 400 px and under your form’s KB limit.

Stays on your device. Nothing is uploaded.

01Size the form asks for

WidthpxHeightpxUnit

02File size limit

Max KBKBMin KB (optional)KB

03Fill for empty edges

Fills only empty edges when you zoom out or rotate. It doesn’t remove the background you were photographed against.

Drop your photo here

JPG, PNG or WebP. A phone photo is fine.

Choose imageTake photo

or drag and drop

04Your file

Choose an image to begin.

About 300 × 400 px

Aspect ratio: 3:4
Orientation: Portrait
Total pixels: 120,000 (0.12 MP)
Printed at 300 DPI: 25.4 × 33.9 mm (1 × 1.33 in)

Printed size by DPI

DPI	mm	inch
72	105.8 × 141.1	4.17 × 5.56
96	79.4 × 105.8	3.13 × 4.17
150	50.8 × 67.7	2 × 2.67
200	38.1 × 50.8	1.5 × 2
300	25.4 × 33.9	1 × 1.33

How it works

01Enter the width and height your form asks for (pixels, or mm/cm/inch with DPI), or tap a common size.
02Set the maximum KB from the form, and a minimum if it has one.
03Choose your photo. Drag to place your face in the guide; pinch or use + and − to zoom.
04Check the KB meter, then press Download. The file is the exact size and never over the limit.

Questions

How do I resize a photo to 300 × 400 pixels?

Open the tool on this page, choose your photo, drag it into the 3:4 frame and press Download. The file is always exactly 300 × 400 px; you never need to type the numbers.

What is 300 × 400 pixels in mm?

It depends on the DPI it is printed at. At 300 DPI it is 25.4 × 33.9 mm; at 96 DPI (screens) it is 79.4 × 105.8 mm. The table on this page lists more.

How many KB is a 300 × 400 photo?

It varies with the picture and the JPEG quality. Set your form’s maximum KB in the tool; it keeps the best quality that fits. A plain background and even light keep the file smaller.