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Resize a Photo for 4×6 Printing

The 4×6 is the default print at every drugstore kiosk and photo lab, and its 2:3 ratio happens to match most camera sensors — but not most phone photos, which shoot at 4:3. That mismatch is why labs silently trim the edges off your pictures. Cropping to the print ratio yourself decides what gets trimmed.

Resize by

Output: 1200 × 1800 px, DPI written to the file.

If the shape doesn't match
85%

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Your images are processed on your device and are not uploaded to PNGful.

How it works

  1. 1

    Add your photo

    The resizer is preset to 4×6 in (4″ × 6″) at 300 DPI — that's 1200 × 1800 pixels.

  2. 2

    Choose crop or pad

    Photos rarely match print proportions exactly; crop-to-fill trims the overflow, pad adds borders instead.

  3. 3

    Check the sharpness

    For top quality you want 1200 × 1800 px; 600 × 900 px still looks fine at arm's length.

  4. 4

    Download and print

    The DPI value is written into the file so print software sizes it correctly.

Common uses

  • Crop phone photos to 2:3 so the lab doesn't trim them blindly
  • Check that a photo has enough pixels before ordering prints
  • Prepare a batch of vacation photos for a kiosk or mail-order lab
  • Frame the crop deliberately instead of losing edges to auto-crop

Good to know

  • A sharp 4×6 print needs 1200×1800 pixels (4 in × 300 and 6 in × 300) at the standard 300 DPI print resolution.
  • 600×900 pixels — 150 DPI — still prints acceptably for casual snapshots viewed at arm's length, though fine detail softens.
  • Phone photos are usually 4:3, but this print is 2:3, so some cropping is unavoidable — do it here on your terms.
  • Print from the original photo, not a copy that was compressed by messaging apps, which can quietly cut resolution below print quality.

Your images stay private

Your images are processed on your device and are not uploaded to PNGful.All processing happens locally using your browser's own image engine — there is no upload step, no server-side queue, and nothing to delete afterwards. Read more in our privacy policy.

Frequently asked questions

How many pixels do I need for a 4×6 print?

1200×1800 pixels for full 300 DPI quality. Around 600×900 (150 DPI) is still acceptable for casual prints, but below that, softness becomes obvious.

Can I just change the DPI number to make my photo printable?

No — DPI is only an instruction for how large to print the pixels you already have. Changing 72 to 300 in a file's metadata doesn't add detail; only more actual pixels do that.

Why did the lab cut off the edges of my photo?

Your photo's aspect ratio didn't match the print's 2:3 ratio, so the lab cropped it to fit — usually a center crop with no judgment about the composition. Cropping to 2:3 before ordering prevents it.

Is my photo good enough to print if it looks fine on screen?

Not necessarily. Screens display around 100–200 pixels per inch and forgive a lot; print at 300 DPI is less forgiving. Check the pixel dimensions rather than trusting how it looks on a monitor.

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