Resize Image to 300×400
300×400 is a 3:4 portrait rectangle — the shape used for vertical listing photos, small book and course covers, team profile cards and catalogue entries that stack in a column. Everything runs in your browser — nothing is uploaded. Need a smaller file instead? Compress or convert.
Drag the preview to choose which part of the image is kept. The same framing is used for every image in the batch.
Why choose 300×400?
300×400 gives a portrait canvas with a 3:4 ratio and 0.12 MP of detail. People most often need it for ID photos, small thumbnails and form uploads.
3:4 portrait shape
Every 300×400 image has a portrait 3:4 ratio, so anything you design for it keeps the same proportions on every screen.
Where it is used
300×400 suits ID photos, small thumbnails and form uploads. Using the exact size avoids a website scaling or cropping your image on its own.
Prints 1×1.33 in at 300 DPI
That is 2.5×3.4 cm at photo quality, or 2×2.7 in at 150 DPI for posters viewed from a distance.
About 19 KB–38 KB as JPG
A typical photo at 300×400 saves to roughly 19 KB–38 KB at good JPG quality; WebP is usually 25–35% smaller.
Sharp results
A 12 MP phone photo has 102× more pixels than 300×400, so resizing down keeps it sharp.
Framing control
A 3:4 phone photo already matches this shape, so almost nothing is cropped.
300×400 at a glance
| Pixels | 300×400 (120,000 pixels) |
|---|---|
| Aspect ratio | portrait 3:4 |
| Megapixels | 0.12 MP |
| Orientation | Portrait |
| Print size at 300 DPI | 1×1.33 in (2.5×3.4 cm) |
| Print size at 150 DPI | 2×2.67 in |
| Typical JPG file | 19 KB–38 KB |
| Typical WebP file | 13 KB–26 KB |
| Common uses | ID photos, small thumbnails and form uploads |
| Similar sizes | 350×467, 354×472, 350×450, 413×531 |
Resize an image to 300×400 in 3 steps
- Add your photo (or several) — drag them onto the box above.
- The size is already set to 300×400. 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:
Landscape sizes
Wider than tall — screens, banners, covers and thumbnails:
Portrait sizes
Taller than wide — passport photos, forms and phone screens:
Change the aspect ratio
Paper, print & photo sizes
Paper and photo sizes in mm, cm and inches, plus DPI tools:
Resize for a platform
Ready-made sizes for social profiles and posts:
Resize tools
Batch resizing, DPI and crop tools:
Working at 300×400
3:4 portrait is the native shape of a phone photo held upright, so vertical phone shots land here with no cropping — just a clean downscale. That makes this one of the friendlier small targets.
Landscape sources are the problem. A 4:3 photo turned portrait gives up about 44% of its width, and a 16:9 screenshot loses close to 60%. Everything near the left and right edges goes. If the subject is off-centre, crop the vertical strip you want first with the cropper so the choice is yours rather than the tool's.
At 0.12 megapixels this is a thumbnail-scale image. It reads well as a card in a grid and will look soft if you blow it up on a desktop page. For covers that will be displayed larger, work at double and let the layout downscale.
Format: JPG for photographs, typically 20–60KB at this size. PNG if the image is a cover with a title set in type, because JPG artefacts around lettering are visible even at 300 pixels wide. Smaller version of the same shape: 150×200.
Frequently asked questions
Is 300×400 the same ratio as 150×200?
Yes — both are 3:4 portrait, so an image cropped for one fits the other exactly. 300×400 has four times the pixels, so use it where the image is displayed larger and drop to 150×200 only when a form or upload limit asks for it.
What aspect ratio is 300×400?
300×400 has a portrait 3:4 aspect ratio. Images with a different shape have to be cropped or padded to fit it.
How big will a 300×400 image print?
At 300 DPI (photo quality) 300×400 prints at 1×1.33 inches (2.5×3.4 cm). At 150 DPI it covers 2×2.67 inches, fine for posters seen from further away.
How large is a 300×400 file?
A photo at 300×400 is usually 19 KB–38 KB as a JPG, and about 13 KB–26 KB as WebP. If you need it smaller, run it through the compressor afterwards.
Will my photo lose quality at 300×400?
No — a normal phone photo is much larger, so it is scaled down and stays sharp.
Can I resize to 300×400 without cropping?
Yes. Tick “Keep aspect ratio”: the whole picture is kept, but one side may come out shorter than 300×400. Without it, the image fills 300×400 exactly and the edges that do not fit the 3:4 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.