Resize Image to 400×400

400×400 is the profile photo square used by Twitter/X and LinkedIn, and a common avatar size across forums, Slack-style tools and company directories. 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 400×400?

400×400 is a square image of 160,000 pixels (0.16 megapixels) in a square (1:1), mostly used for X (Twitter) and many other profile pictures.

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1:1 square shape

The square (1:1) proportion decides how your photo is framed: plan the subject around that shape before you crop.

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The exact size needed

400×400 is the exact size for X (Twitter) and many other profile pictures, so your image is shown as-is instead of being re-scaled or cropped by the platform.

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Prints 1.33×1.33 in at 300 DPI

That is 3.4×3.4 cm at photo quality, or 2.7×2.7 in at 150 DPI for posters viewed from a distance.

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About 25 KB–50 KB as JPG

Expect around 25 KB–50 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 76× more pixels than 400×400, so resizing down keeps it sharp.

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Framing control

Filling 400×400 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.

400×400 at a glance

Pixels	400×400 (160,000 pixels)
Aspect ratio	square (1:1)
Megapixels	0.16 MP
Orientation	Square
Print size at 300 DPI	1.33×1.33 in (3.4×3.4 cm)
Print size at 150 DPI	2.67×2.67 in
Typical JPG file	25 KB–50 KB
Typical WebP file	18 KB–35 KB
Common uses	X (Twitter) and many other profile pictures
Similar sizes	360×360, 450×450, 350×350, 480×480

Resize an image to 400×400 in 3 steps

Add your photo (or several) — drag them onto the box above.
The size is already set to 400×400. 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

Profile photos at 400×400

400×400 gives you enough resolution that the image still looks sharp when a high-DPI screen renders it in a 200-pixel slot, which is why the bigger professional networks landed here rather than on something smaller.

Both Twitter/X and LinkedIn display profile photos as circles, so the corners of your square are decorative at best. Keep the face or mark centred with margin around it. Test it small: the version most people actually see next to a post is around 48 pixels wide.

For a headshot, JPG at this size lands around 40–100KB and looks fine. For a company logo, use PNG — the lossless edges matter when the mark has thin lettering, and you can keep the background transparent so it sits correctly on both light and dark themes.

If your source is a full-body or group photo, crop to the head and shoulders first with the cropper. Scaling a wide photo directly to 400×400 leaves a face maybe 40 pixels tall, which is unreadable at display size. Platform requirements shift periodically, so confirm the current spec before a rebrand. Related: 320×320 and 512×512.

Frequently asked questions

Is 400×400 big enough for a LinkedIn or Twitter profile photo?

Yes — both accept and display it well, and it has enough resolution to stay sharp on high-DPI screens. Uploading something much larger gains you nothing because the platform downscales it anyway; uploading something much smaller will look visibly soft.

What aspect ratio is 400×400?

400×400 has a square (1:1) aspect ratio. Any size with the same ratio — for example 360×360, 450×450 — can be scaled to it without cropping.

How big will a 400×400 image print?

At 300 DPI (photo quality) 400×400 prints at 1.33×1.33 inches (3.4×3.4 cm). At 150 DPI it covers 2.67×2.67 inches, fine for posters seen from further away.

How large is a 400×400 file?

A photo at 400×400 is usually 25 KB–50 KB as a JPG, and about 18 KB–35 KB as WebP. If you need it smaller, run it through the compressor afterwards.

Will my photo lose quality at 400×400?

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

Can I resize to 400×400 without cropping?

Yes. Tick “Keep aspect ratio”: the whole picture is kept, but one side may come out shorter than 400×400. Without it, the image fills 400×400 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.