Resize Image to 40×40

40×40 is a common avatar size in comment threads, chat sidebars and contact lists — big enough to recognise a face, small enough to stack dozens down a page. Everything runs in your browser — nothing is uploaded. Need a smaller file instead? Compress or convert.

or drop images here — or press Ctrl + V to paste

JPG · PNG · WebP · GIF · BMP — no size limit, no sign-up

Width (px)

Height (px)

Unit

DPI

Keep aspect ratio (set one, the other follows)

Scale 50%

Aspect ratio

Width in pixels (optional)

Fit whole image inside instead of cropping to fill (result may be smaller than the preset)

Output format

Output quality 90

Position & zoom

Zoom 100%

Drag the preview to choose which part of the image is kept. The same framing is used for every image in the batch.

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resized

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new size

Added 0 files

Why choose 40×40?

At 40×40 pixels, an image holds 0 megapixels in a square (1:1). It is a common choice for icons, emoji and favicons.

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1:1 square shape

Every 40×40 image has a square (1:1) ratio, so anything you design for it keeps the same proportions on every screen.

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Where it is used

40×40 suits icons, emoji and favicons. Using the exact size avoids a website scaling or cropping your image on its own.

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Prints 0.13×0.13 in at 300 DPI

That is 0.3×0.3 cm at photo quality, or 0.3×0.3 in at 150 DPI for posters viewed from a distance.

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About 0 KB–0 KB as JPG

Expect around 0 KB–0 KB for a JPG photo at this size. Simple graphics are smaller, PNG photos several times larger.

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Sharp results

A 12 MP phone photo has 7,620× more pixels than 40×40, so resizing down keeps it sharp.

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Framing control

Filling 40×40 from a 4:3 phone photo trims about 25% of it. Drag the preview to choose what stays, or tick “Keep aspect ratio” to keep it all.

40×40 at a glance

Pixels	40×40 (1,600 pixels)
Aspect ratio	square (1:1)
Megapixels	0 MP
Orientation	Square
Print size at 300 DPI	0.13×0.13 in (0.3×0.3 cm)
Print size at 150 DPI	0.27×0.27 in
Typical JPG file	0 KB–0 KB
Typical WebP file	0 KB–0 KB
Common uses	Icons, emoji and favicons
Similar sizes	32×32, 50×50, 28×28, 64×64

Resize an image to 40×40 in 3 steps

Add your photo (or several) — drag them onto the box above.
The size is already set to 40×40. Drag the preview to frame it, or tick “Keep aspect ratio” to avoid cropping.
Click Resize and download, or save everything as one ZIP.

New to image resizing? Read the full resizing guide.

Square sizes

Same width and height — profile photos, icons, product shots:

8 × 8 10 × 10 16 × 16 28 × 28 32 × 32 40 × 40 50 × 50 64 × 64 96 × 96 98 × 98 100 × 100 112 × 112 120 × 120 128 × 128 144 × 144 150 × 150 180 × 180 184 × 184 192 × 192 200 × 200 240 × 240 250 × 250 256 × 256 300 × 300 320 × 320 350 × 350 360 × 360 400 × 400 450 × 450 480 × 480 500 × 500 512 × 512 600 × 600 640 × 640 700 × 700 800 × 800 840 × 840 900 × 900 1000 × 1000 1024 × 1024 1080 × 1080 1100 × 1100 1200 × 1200 1300 × 1300 1400 × 1400 1500 × 1500 1600 × 1600 1920 × 1920 2000 × 2000 2048 × 2048 2400 × 2400 2500 × 2500 3000 × 3000 4000 × 4000 5000 × 5000 6000 × 6000

Landscape sizes

Wider than tall — screens, banners, covers and thumbnails:

64 × 32 140 × 110 150 × 100 200 × 150 300 × 80 300 × 250 320 × 240 400 × 150 480 × 360 512 × 128 512 × 256 555 × 425 600 × 240 600 × 400 (3:2) 640 × 360 640 × 480 (4:3) 680 × 240 800 × 600 (4:3) 851 × 315 900 × 600 1000 × 500 1024 × 576 (16:9) 1080 × 566 1128 × 191 1200 × 628 1200 × 630 1200 × 675 (16:9) 1200 × 800 1200 × 900 1280 × 700 1280 × 720 (HD) 1366 × 768 1500 × 500 1500 × 1000 (3:2) 1600 × 900 1920 × 1080 (Full HD) 1920 × 1200 (16:10) 2048 × 1152 (2K) 2560 × 1440 (1440p) 2660 × 1140 (banner) 3000 × 1500 3440 × 1440 3840 × 2160 4080 × 3060

Portrait sizes

Taller than wide — passport photos, forms and phone screens:

Change the aspect ratio

Fit an image to a ratio without choosing pixels:

Any aspect ratio 16:9 4:3 3:2 1:1 4:5 5:4 3:4 2:3 9:16 21:9 5:2

Paper, print & photo sizes

Paper and photo sizes in mm, cm and inches, plus DPI tools:

A5 A4 A3 Letter Legal 4R (4 × 6 in) Postcard Stamp size Signature 2.5 × 2.5 cm 3 × 4 cm 3.3 × 4.8 cm 3.5 × 2.5 cm 3.5 × 3.5 cm 3.5 × 4.5 cm 3.5 × 5 cm 3.81 × 3.81 cm 4 × 3 cm 4 × 4 cm 4 × 5 cm 4 × 6 cm 4.5 × 3.5 cm 5 × 5 cm 5 × 7 cm 5.08 × 5.08 cm 25 × 25 mm 30 × 40 mm 32 × 26 mm 33 × 48 mm 35 × 35 mm 35 × 45 mm 35 × 50 mm 35 × 54 mm 36 × 36 mm 38.1 × 38.1 mm 40 × 50 mm 45 × 35 mm 45 × 38 mm 47 × 36 mm 50 × 50 mm 50 × 70 mm 50.8 × 50.8 mm 51 × 51 mm 52 × 40 mm 1.18 × 1.57 in 1.30 × 1.89 in 1.38 × 1.38 in 1.38 × 1.77 in 1.5 × 1.5 in 1.97 × 2.76 in 2 × 2 in 3 × 3 in 4 × 6 in 5 × 7 in 6 × 4 in 8 × 10 in 8.5 × 11 in Resize in pixels Resize in cm Resize in mm Resize in inches Resize by percentage 72 DPI converter 100 DPI converter 150 DPI converter 200 DPI converter 300 DPI converter 600 DPI converter

Resize for a platform

Ready-made sizes for social profiles and posts:

Resize tools

Batch resizing, DPI and crop tools:

Bulk image resizer Resize for printing Image DPI converter Image DPI checker Circle crop Square crop

Getting a face to read at 40 pixels

At 40×40 a face is roughly 30 pixels across once you allow for a little background. That is enough to be recognisable only if the face fills the frame. A full-body shot or a group photo resized this small becomes anonymous.

Crop to head and shoulders first. Use the cropper with the square ratio, frame from just above the hair to the top of the shoulders, then resize here. The eyes should sit roughly a third of the way down.

Circles cut the corners. Many sites display avatars as circles, which hides the four corners of your square. Keep anything important away from the edges.

Deliver at 2× if you can. A slot drawn at 40 CSS pixels uses 80 real pixels on a high-DPI phone. If you control the site, upload an 100×100 or larger and let the page scale it. Use exact 40×40 when a form or template insists on it.

Format. JPG is fine for photos and tiny in file size at this scale. Use PNG if the avatar is a logo or needs a transparent background.

Slightly bigger options: 50×50 for older templates, 64×64 for sharper list icons.

Sizes similar to 40×40

Close in shape and size — each one opens the tool already set to it:

32 × 32 96 × 96 98 × 98 16 × 16 128 × 128 150 × 150 10 × 10 180 × 180

Frequently asked questions

Why does my 40×40 avatar look blurry on my phone?

Phones have high-DPI screens, so a 40-pixel slot is drawn with 80 or 120 real pixels. A 40×40 file has to be stretched to fill it. If the site allows, upload a larger square such as 120×120 or 200×200 and let it scale down.

What aspect ratio is 40×40?

40×40 has a square (1:1) aspect ratio. Any size with the same ratio — for example 32×32, 50×50 — can be scaled to it without cropping.

How big will a 40×40 image print?

At 300 DPI (photo quality) 40×40 prints at 0.13×0.13 inches (0.3×0.3 cm). At 150 DPI it covers 0.27×0.27 inches, fine for posters seen from further away.

How large is a 40×40 file?

A photo at 40×40 is usually 0 KB–0 KB as a JPG, and about 0 KB–0 KB as WebP. If you need it smaller, run it through the compressor afterwards.

Will my photo lose quality at 40×40?

No — a normal phone photo is much larger, so it is scaled down and stays sharp.

Can I resize to 40×40 without cropping?

Yes. Tick “Keep aspect ratio”: the whole picture is kept, but one side may come out shorter than 40×40. Without it, the image fills 40×40 exactly and the edges that do not fit the 1:1 shape are trimmed.

Are my images uploaded?

No. Resizing happens entirely in your browser. Nothing is transmitted or stored, and you can disconnect from the internet after the page loads and it still works.