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Lizely

CSS Checkbox Generator

Create an accessible native checkbox style and copy synchronized CSS and HTML.

Privacy: your files never leave your device. All processing happens locally in your browser.

How to use

  1. 1.Adjust size, border, radius, and the three colors while toggling the live checkbox preview.
  2. 2.Copy the CSS and HTML, then replace the example label with the real form choice.
  3. 3.Test keyboard focus, Space activation, contrast, zoom, errors, disabled state, and forced colors in the destination.

About CSS Checkbox Generator

CSS Checkbox Generator creates a focused custom appearance for a native HTML checkbox. Set the square size, border width, corner radius, accent color, background color, and checkmark color. The page renders a real interactive checkbox using the generated class, then exposes the exact CSS and accessible HTML used by the preview. Generation and copying happen entirely in the current browser tab, with no account, upload, stylesheet service, or saved design state.

The generated control keeps an input with type checkbox instead of replacing it with a generic div. CSS appearance: none removes the browser's default drawing while the native element still provides checked state, keyboard focus, form participation, and disabled behavior when the surrounding application uses those features correctly. The example HTML pairs the input with visible label text inside a label element, so clicking the text toggles the control and the checkbox has an accessible name. Change the example label to describe the real choice rather than leaving generic wording in production.

Size accepts whole pixels from sixteen through sixty-four. Border accepts one through six pixels. Radius accepts zero through fifty percent. Each color must be a complete six-digit HEX value. The pure generator rejects malformed colors, decimals where integers are required, and out-of-range geometry rather than silently producing misleading code. Browser color controls supply valid values during normal use, and the numeric controls constrain ordinary pointer and keyboard changes.

The checkmark is drawn with a ::after pseudo-element only while the input is checked. Its width, height, and border thickness scale from the chosen box size, with minimum values that keep the mark visible at the smallest supported size. The mark uses only right and bottom borders, rotates forty-five degrees, and is positioned from proportional offsets. These ratios are deliberate product choices, not a universal design standard. At unusual zoom levels, device pixel ratios, or extreme border settings, antialiasing may make one edge appear slightly heavier.

The output includes box-sizing: border-box so the selected size includes the visible border. It also includes cursor: pointer, a checked background and border color, relative positioning for the pseudo-element, and a focus-visible outline with an offset. The outline color matches the selected accent. Focus is not removed. This matters because keyboard users need a visible indication of which control will respond to Space. Your site may need a different outline color or width to meet contrast requirements against its actual surroundings.

The preview uses the exact generated stylesheet in a scoped class name, lizely-checkbox. Click the box or its preview label to exercise checked and unchecked states. Use keyboard Tab and Space during final application testing; the embedded tool page contains many focusable controls, so the preview alone is not a substitute for testing the destination form's order and instructions. The generator does not simulate indeterminate, invalid, required, disabled, read-only, high-contrast, or forced-colors states. Add and verify those states when the real product needs them.

Copy CSS and Copy HTML request clipboard permission separately. A success message identifies which output was copied. If permission is denied, both code blocks remain visible for manual selection and the page does not report a false success. The HTML snippet deliberately contains no inline script. Checkbox state is managed by the browser and the surrounding form. Framework users can translate class to className and connect checked/onChange as required, but should retain a native input and an accessible label relationship.

A visually attractive checkbox is not automatically accessible. Check the accent, background, checkmark, border, focus indicator, surrounding page, hover state, error text, and disabled state in the final theme. Test at 200 percent zoom and with keyboard navigation. Operating-system forced colors may override custom colors; that behavior can be beneficial and should not be defeated without a strong reason. Motion is not generated, so no animation preference handling is needed for this baseline.

MDN documents the appearance property used to suppress native rendering and its compatibility considerations. CSS Basic User Interface defines appearance behavior at the standards level. The tool's dimensions and checkmark ratios are locally defined and covered by exact string and geometry tests, not presented as externally mandated values. The result is best treated as a clean starting point: paste it into a controlled stylesheet, rename the class if needed, preserve the native semantics, and validate the complete form with real content and assistive technology.

Methodology & sources

Validate bounded integer geometry and strict HEX colors, preserve a native labeled checkbox, scale a CSS pseudo-element checkmark from box size, retain focus-visible styling, and keep preview and copied output identical.

Frequently asked questions

Is the generated checkbox still a native form control?
Yes. The HTML uses input type checkbox; CSS changes its drawing while the browser retains native checked state, keyboard activation, and form semantics.
Does the example include an accessible name?
Yes. The input is nested in a visible label, but you must replace the example wording with a meaningful description of the real choice.
Does it cover disabled and error states?
No. The baseline covers unchecked, checked, and focus-visible states; add and test disabled, invalid, required, and contextual help when needed.
Why can the control look different in forced-colors mode?
Operating systems and browsers may override custom colors for user accessibility settings. Test that mode and avoid suppressing useful overrides.

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