Resize Image to 640×640

640×640 is the square Instagram used for feed posts before it moved to 1080, and it is still a common size for app assets, cached thumbnails and API image responses. 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.

—

resized

—

new size

Added 0 files

Why choose 640×640?

At 640×640 pixels, an image holds 0.41 megapixels in a square (1:1). It is a common choice for social posts and product photos.

▢

1:1 square shape

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

🎯

Where it is used

640×640 suits social posts and product photos. Using the exact size avoids a website scaling or cropping your image on its own.

🖨

Prints 2.13×2.13 in at 300 DPI

That is 5.4×5.4 cm at photo quality, or 4.3×4.3 in at 150 DPI for posters viewed from a distance.

💾

About 64 KB–130 KB as JPG

Expect around 64 KB–130 KB for a JPG photo at this size. Simple graphics are smaller, PNG photos several times larger.

✨

Sharp results

A 12 MP phone photo has 30× more pixels than 640×640, so resizing down keeps it sharp.

✂

Framing control

Filling 640×640 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.

640×640 at a glance

Pixels	640×640 (409,600 pixels)
Aspect ratio	square (1:1)
Megapixels	0.41 MP
Orientation	Square
Print size at 300 DPI	2.13×2.13 in (5.4×5.4 cm)
Print size at 150 DPI	4.27×4.27 in
Typical JPG file	64 KB–130 KB
Typical WebP file	45 KB–90 KB
Common uses	Social posts and product photos
Similar sizes	600×600, 700×700, 512×512, 800×800

Resize an image to 640×640 in 3 steps

Add your photo (or several) — drag them onto the box above.
The size is already set to 640×640. 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

640×640 in practice

If you are working with an older integration, an archived export or an API that returns fixed-size images, 640×640 is a number you will meet. It was the Instagram feed standard for years, so a lot of tooling built around that era still expects it.

For anything going onto Instagram today, 640 is too small — the current feed square is 1080×1080 and uploading 640 means the app upscales it, which looks soft. Use 1080×1080 for that. This page is for the cases where 640 is genuinely what the system wants.

Where it still earns its place is app and cache assets. 640×640 is a sensible mid-weight square: sharp on a phone at typical display sizes, around 80–180KB as a JPG, and small enough that you can ship a lot of them without bloating the bundle. It is also double 320, so it downscales to a profile square cleanly.

Square crop rules apply — the long edge of a non-square source goes. Crop first with the cropper if that matters. If the target is a product image that will be zoomed, go up to 1200×1200 instead.

Frequently asked questions

Should I still use 640×640 for Instagram?

No. Instagram's feed square is 1080×1080 now, and uploading 640 means the app enlarges it, which looks soft on modern phones. 640×640 is only the right choice when an older system or API specifically requires it.

What aspect ratio is 640×640?

640×640 has a square (1:1) aspect ratio. Any size with the same ratio — for example 600×600, 700×700 — can be scaled to it without cropping.

How big will a 640×640 image print?

At 300 DPI (photo quality) 640×640 prints at 2.13×2.13 inches (5.4×5.4 cm). At 150 DPI it covers 4.27×4.27 inches, fine for posters seen from further away.

How large is a 640×640 file?

A photo at 640×640 is usually 64 KB–130 KB as a JPG, and about 45 KB–90 KB as WebP. If you need it smaller, run it through the compressor afterwards.

Will my photo lose quality at 640×640?

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

Can I resize to 640×640 without cropping?

Yes. Tick “Keep aspect ratio”: the whole picture is kept, but one side may come out shorter than 640×640. Without it, the image fills 640×640 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.