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DPI Checker

See exactly how big an image prints at your chosen DPI and whether resolution is high enough for a full paper page — without downloading anything.

  • No upload — processed on this device
  • No account needed
  • Free to use
Open the tool
Check DPI
300 DPIprints sharp on A4
Passes

Keep going

The natural next step

WorkflowCyber café & service centre workflowsThe tools a cyber café or online service centre runs all day: print customers' passport and ID photos, prepare documents for printing, combine application pages, and keep the queue moving without uploading anyone's files.GuideHow to check an image's dimensions before submittingTwo minutes of verification prevents most rejections. What to check, which tools read it, and what the numbers should tell you.Related toolDocument Print PrepScale and re-embed a PDF's pages so they print clean and centered on your chosen paper size, in your browser.

The details

How it works and what to expect

How it works

  1. Add the images you plan to print.
  2. Choose the paper size (A4, A5, A3, Letter or Legal) and a target DPI (150–600).
  3. Read the report: print size at that DPI, the effective DPI on your paper, and whether the whole page is safe.

What the numbers mean

  • Print size — how large the photo would be at the target DPI (300 DPI is the standard for good prints).
  • DPI on page — the resolution actually reached when the image width fills the full page width.
  • Whole page — if the shorter side also has enough pixels, the image can fill the whole sheet without softening.

Quick guide

  • 150 DPI — acceptable for everyday photocopy-quality documents.
  • 300 DPI — crisp office documents and clear text.
  • 600 DPI — archival scans and small type.

Privacy

Image information is read from file headers only, entirely on this device. Nothing is uploaded.

Practical guidance

Using this tool well

When it is the right answer, what tends to go wrong, and what to check before you rely on the result.

Why use it

Whether an image will print acceptably is a calculation — pixels against intended size — not an impression. The tool does that arithmetic so you can decide before committing ink and paper.

Typical situations

  • You must check whether a photo has enough pixels for a full page print.
  • You need the printed dimensions of an image at a chosen DPI.
  • Two files look identical on screen and you need to know which prints better.

Common problems

  • The DPI value itself was changed, not the image

    DPI only describes how existing pixels map to physical size. Changing the label never adds detail — the pixel count is what carries quality.

  • The result says the image is too small

    Reduce the intended print size, or start from a higher-resolution original. Enlarging pixels cannot recover detail that was never captured.

  • Screen and print numbers disagree

    Screens ignore DPI entirely; only the printer applies it. Judge screen quality by pixels and print quality by the reported DPI at your size.

Check before you submit

  1. Confirm the intended print size matches what the report assumed.
  2. Compare the reported pixel density against roughly 300 DPI for close viewing, 150 DPI for larger output.
  3. Keep the original file — the tool reports, it does not modify.

Read next

Guides and reference

The reading that goes with this tool — a walkthrough of the job, and the terms it uses.

Terms used on this page

Defined in the site glossary, with the practical context that matters here.

Guided

This tool inside a workflow

A ready-made sequence that solves a whole job — this tool is one step in it.