Clog and missing-line detector

Free printer nozzle check test page for clogged printheads

Print a free nozzle check test page to spot clogged printheads, missing lines and weak ink channels before running an ink-heavy cleaning cycle on inkjet printers.

Free and private A4, Letter, A5, Legal and A3 No download required

Open print preview

Print setup

Preview and print this diagnostic page

The pattern prints locally from your browser. No file or printer information is uploaded.

Scale: 100% or Actual size Enable background graphics Use the matching paper size

To download a PDF, choose “Save as PDF” in the print dialog.

PRINTTEST.ORG

Printer Nozzle Check

Inspect every staircase for missing segments or white gaps

Black

Cyan

Magenta

Yellow

Good patternEvery segment is continuous and evenly saturated.

Possible clogRepeatable gaps can indicate nozzles that are not firing.

What this sheet checks

What is the nozzle check printer test page?

A printer nozzle check is a test page of fine staggered lines printed in black, cyan, magenta and yellow that reveals clogged or non-firing printhead nozzles as white gaps before you run an ink-heavy cleaning cycle.

Missing line segments
Weak individual color channels
Repeated horizontal gaps
Post-cleaning improvement

When to use it

When to use the nozzle check test page

This browser-based pattern is a fast visual screen for gaps, white streaks, and weak channels. Your printer's built-in nozzle check remains the authoritative model-specific test because it can address individual nozzle groups directly.

Read the result

Common nozzle check printing problems and how to fix them

Compare the physical sheet with the on-screen structure. Paper, driver settings, supplies, and maintenance state can all affect the result.

What you seeWhat it may meanWhat to do next

A color pattern contains clean white gapsSome nozzles in that channel may not be firing.Run the printer's built-in nozzle check, then follow its cleaning guidance if the same gaps appear.

Every pattern is faintDraft mode, low supplies, incorrect paper selection, or a broader delivery problem may be involved.Check driver quality, supplies, and paper settings before using repeated deep-clean cycles.

Gaps move between repeated printsInk flow may be intermittent or paper fibers may be affecting the output.Allow the printer to rest, use clean recommended paper, and follow manufacturer instructions.

How to print the nozzle check test page accurately at 100% scale

Load clean, uncreased paper and choose the same paper size in this page, your browser, and the printer driver. Open the print dialog, select 100% or Actual size, and enable background graphics so solid patches and gradients are retained. Use the paper type that matches the sheet in the tray.

Start with normal quality. Draft mode intentionally reduces density, while high-quality or photo modes can use different passes and inks. A standard print establishes a useful baseline before you change driver controls or run maintenance.

Frequently asked questions about this printer test page

Should I clean the printhead every time a nozzle test has gaps?

Use the manufacturer's sequence. Repeated cleaning consumes ink and may not solve alignment, cartridge, or mechanical problems.

Is this the same as my printer's built-in nozzle check?

No. This general pattern can reveal visible gaps, but built-in utilities are designed for the exact nozzle arrangement and maintenance system in your printer.

What this browser test page can and cannot tell you

This page reveals visible output symptoms but cannot read ink levels, identify a failed component, or control your printer. Built-in manufacturer diagnostics are model-specific and should be used for maintenance decisions. Avoid repeating deep cleaning cycles without consulting the applicable printer guidance because cleaning can consume substantial ink.