How many pixels does a print need?

Most labs print at 300 dpi, so multiply the print size in inches by 300. A 5×7 in print needs 1500×2100 px, 8×10 in needs 2400×3000 px, 11×14 in needs 3300×4200 px and 16×20 in needs 4800×6000 px. Posters seen from a few steps away look fine at 150 dpi, which halves those numbers.

Which option should I pick?

Match the long side to your print. 2K (2560 px) covers about 8 inches at 300 dpi, or a 17-inch poster at 150 dpi. 4K (3840 px) covers about 13 inches at 300 dpi and suits 11×14 and 12×16 in prints. 8K (7680 px) is for 16×20 in and larger, and reaches about 50 inches at 150 dpi. If your photo already has enough pixels, you do not need to enlarge it.

How do I check the pixel size of my photo?

On Windows, right-click the file, open Properties and then Details. On a Mac, open it in Preview and choose Tools, then Show Inspector. Phones show it in the photo’s info panel. Look for width × height in pixels.

Will a blurry or tiny photo print sharp after upscaling?

Upscaling gives a photo more pixels and cleaner edges, so it prints much better than a stretched copy. It cannot add detail the camera never captured: a blurry face stays soft and a thumbnail is still a thumbnail.

Can I print the free result?

Fast 2× is free, but free results are limited to 2048 px with a small watermark, which suits a size check or a print up to about 7 inches. For clean print files, use 2K, 4K or 8K.

You can try one photo a day without an account. Signed in with Google, you get 10 free credits every day for Standard runs, up to 2 photos. Free results are JPGs up to 2048 px with a small watermark; credit packs and Pro give full-size results without a watermark and unlock every model.

What happens to my photos?

They are used only to run your edit. Files without an account are deleted after 24 hours; signed-in history keeps them for 7 days, then they are deleted.

Upscale image for printing

Upscale image for printing so large prints stay sharp

A photo that looks fine on a screen can turn soft or blocky on paper. Check how many pixels your print size needs, then enlarge the photo to 2K, 4K or 8K in one step.

After — Example · drag to compareUpload to try it on your photo

Before — Example · drag to compareUpload to try it on your photo

Upload an image

Drop a file here, pick one, or paste from the clipboard. JPEG, PNG, WebP or HEIC up to 15 MB.

Model

Format

Models and file formats unlock with credits.

No account required

Files are deleted automatically: 24 hours without an account, 7 days in your history. We don’t use your photos to train AI.

Small photos, enlarged

A portrait and a product shot, each enlarged from a small file. Drag the slider to compare.

BeforeAfter

Example

Portrait with a flower crown

Skin, hair and petals keep their detail when the small file gets more pixels. It is still the same woman.

BeforeAfter

Example

Headphones on yellow

Edges and surfaces of a small product photo come out smooth instead of blocky.

How to upscale an image for printing

Step 1
Work out the pixels you need
Multiply the print size in inches by 300. For an 8×10 in print that is 2400×3000 px. Posters viewed from further away can use 150 dpi.
Step 2
Upload and choose a size
JPEG, PNG, WebP or HEIC up to 15 MB. Pick 2K, 4K or 8K to match the long side you need. The cost is on the button.
Step 3
Compare, then download
Slide across faces and edges to check them. Paid runs can be saved as JPG, PNG or WebP at full size, ready to send to a print lab.

At a glance

Price: 2 to 8 credits per image
Free: 1 photo a day free; with Google sign-in, 10 free credits a day (up to 2 photos)
Files: JPEG, PNG, WebP or HEIC, up to 15 MB
Account: Not needed to buy credits
Privacy: Deleted after 24 hours without an account; kept 7 days in your history when signed in

Pixels, dpi and print size

A printer needs enough pixels to cover the paper. At 300 dpi, which most photo labs use, one inch takes 300 pixels: a 4×6 in print needs 1200×1800 px, 8×10 in needs 2400×3000 px and 16×20 in needs 4800×6000 px. With fewer pixels than that, the lab stretches the photo and the print looks soft or blocky.

Posters and canvases are looked at from further back, so 150 dpi is usually enough. That halves the numbers: 3600×5400 px covers a 24×36 in poster.

The upscaler adds pixels to reach the size you choose and rebuilds edges and texture as it goes, which looks cleaner than the plain stretch a printer or an editor would do. 2K reaches 2560 px on the long side, 4K reaches 3840 px and 8K reaches 7680 px.

Which size for which print

2K: 4×6 to 8×10 in prints and A4 pages. 4K: 11×14 and 12×16 in prints and framed photos. 8K: 16×20 in and larger, canvases and posters.

What you get

01
Sized for print
Pick a long side of 2560, 3840 or 7680 px, from a desk print to a wall poster.
02
Real edges, not stretching
Hair, fabric and fine lines are rebuilt as the photo grows, instead of the pixels being smeared.
03
Priced by size
2K costs 2 credits, 4K costs 4 and 8K costs 8. Fast 2× is the free option.

Print size guide: how many pixels you need

A sharp print needs about 300 pixels for every inch. The table shows the pixels each common size needs, and the option that gets a typical 1000–1500 px phone photo or scan there.

Print size guide: how many pixels you need
Print size	Pixels at 300 dpi	Pick
4 × 6 in	1800 × 1200 px	Fast 2× (free)
5 × 7 in	2100 × 1500 px	2K
8 × 10 in	3000 × 2400 px	4K
11 × 14 in	4200 × 3300 px	4K (about 270 dpi), or 8K for a full 300 dpi
A4 (210 × 297 mm)	3508 × 2480 px	4K
16 × 20 in	6000 × 4800 px	8K
24 × 36 in poster	10800 × 7200 px	8K (about 210 dpi), enough for a poster

Pixels are long side × short side. Posters are viewed from further away, so 150 dpi is fine: a 24 × 36 in poster then needs only 5400 × 3600 px. The 2K, 4K and 8K options enlarge the long side to about 2560, 3840 and 7680 px.

What it does not do

It cannot add detail the photo never had. A blurry or tiny photo prints cleaner but not sharp.
It does not change the aspect ratio. A 3:2 photo prints at 3:2, so a 4:5 frame crops it or leaves a border.
It does not convert colors for print or replace a good printer and paper.
Without an account, your upload and the result are removed after 24 hours.

Need further adjustments?

Download it as it is, or take it further with one of these tools:

BeforeAfter
Image upscaler
All six sizes, including Pro 2× and 4×.
Try this tool
BeforeAfter
Fix pixelated image
Clean up blocky files before you enlarge them.
Try this tool
BeforeAfter
AI image extender
Add room around the photo to fit a frame.
Try this tool