Will it print sharp
at that size?
Drop the file in, enter the finished size, and get the verdict a pre-press operator would give you — before it goes on the press, not after.
- File
- storefront-banner.jpg
- Pixels
- 7200 × 2400 px
- Print size
- 12 ft × 4 ft
- Effective
- 50 DPI
Read from across a car park. At 20–50 ft, 50 DPI is the target — a banner never needs 300.
- File
- menu-board.png
- Pixels
- 900 × 1200 px
- Print size
- 18 in × 24 in
- Effective
- 50 DPI
Read from two feet away. You want 150 DPI at that distance — this needs a file about 3× larger, or vector artwork.
Resolution on its own means nothing. The number that matters is how far away it gets read from.
Drop your image here, click to browse, or paste it
JPG, PNG, WebP, GIF, SVG — nothing is uploaded
The check runs locally in your browser — files are never uploaded or stored.
Drop an image, enter the size — instant DPI verdict. Captioned; no sound needed.
How much DPI do you actually need?
The farther away a print is viewed, the less resolution it needs. This is why a billboard can print at 20 DPI and still look sharp from the highway — and why chasing 300 DPI on a banner wastes everyone's time.
| Typical use | Viewing distance | Minimum DPI |
|---|---|---|
| Business cards, brochures (in hand) | under 2 ft | 300 |
| Posters, trade-show graphics | 3 – 6 ft | 150 |
| Wall graphics, window signs | 6 – 10 ft | 100 – 125 |
| Yard signs, A-frames | 10 – 20 ft | 75 – 100 |
| Banners across a parking lot | 20 – 50 ft | 50 |
| Billboards | 50 ft + | 20 – 30 |
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Print resolution, answered
What DPI do I need for printing?
It depends on viewing distance. Items read in the hand (business cards, brochures) need 300 DPI. Posters and trade-show graphics viewed from 3–6 feet look great at 150 DPI. Large-format signs viewed from 10+ feet are fine at 75–100 DPI, and billboards viewed from across a road print at 20–50 DPI. This checker computes your file's effective DPI at your print size and grades it against those thresholds.
What resolution does a banner need?
A typical 3×6 ft vinyl banner viewed from 10–20 feet prints well at 75–100 DPI — that's roughly 2,700 × 5,400 pixels at 75 DPI. You rarely need 300 DPI at banner sizes; the file would be enormous and the extra detail is invisible at viewing distance.
My file says 72 DPI — is it unprintable?
Not necessarily. The DPI number saved inside a file is just metadata. What actually matters is pixel dimensions divided by print size — the effective DPI. A '72 DPI' photo that is 6000 pixels wide still prints a 20-inch-wide poster at a crisp 300 DPI. That's exactly what this tool calculates.
Can I increase the DPI of an image?
You can't add real detail that was never captured. Traditional upscaling makes a bigger, blurrier file. Modern AI upscalers can help within reason (2–4×), but the best fixes are getting the original/higher-resolution file — or a vector version (AI, EPS, SVG, vector PDF), which scales to any size with no quality loss.
What about vector files like SVG, AI, or EPS?
Vector artwork has no resolution — it's math, not pixels, so it prints perfectly sharp at any size. If this checker detects an SVG, it will tell you you're good at any dimensions. For AI/EPS/PDF, ask whether the contents are true vector or just an embedded photo — embedded photos still obey the DPI rules.
Is my file uploaded to your server?
No. The checker runs entirely in your browser using local JavaScript — your file is never transmitted, stored, or seen by us. Refresh the page and it's gone. The only thing that can leave your browser is the written report, and only if you ask us to email it: that sends the numbers you can see on screen plus the address you typed. The image itself never goes anywhere.
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