HTML editor
Edit markup with a sandboxed live preview.
Free · Browser-basedPreview a URL in a resizable frame; some sites disallow embedding.
The URL you choose is loaded in an embedded frame. That website receives the browser request.
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.
Preview a URL in a resizable frame; some sites disallow embedding. 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.
The URL you choose is loaded in an embedded frame. That website receives the browser request.
The URL you choose is loaded in an embedded frame. That website receives the browser request.
Privacy detailsThe embedded site receives a browser request. Some websites block framing or need permissions excluded by this sandbox. Width is simulated by the frame; device identity remains your browser.