HTML editor
Edit markup with a sandboxed live preview.
Free · Browser-basedMeasure pixels or calibrate centimetres and inches to your display.
Files and tool inputs are processed on your device. Media access starts only after your action and browser permission.
Enter a public URL or select the measurement controls.
Run the checker, open the preview, or inspect your display measurements.
Read the results and the tool-specific browser limitations.
Measure pixels or calibrate centimetres and inches to your display. Provides practical web inspection and display utilities with explicit actions before any external URL is requested.
Sites can block embedding or HEAD requests. Screen values are CSS pixels; physical ruler measurements require calibration.
Enter a public URL or select the measurement controls. Run the checker, open the preview, or inspect your display measurements. Read the results and the tool-specific browser limitations.
Files and tool inputs are processed on your device. Media access starts only after your action and browser permission.
Files and tool inputs are processed on your device. Media access starts only after your action and browser permission.
Privacy detailsFor centimetres or inches, compare the scale with a physical ruler and adjust pixels per inch until they match. Browser zoom and display scaling affect physical accuracy. The cm scale has 2 mm minor ticks.