ARIA Attribute Validator - Online Check HTML Accessibility
Paste an HTML snippet and check for common ARIA mistakes: missing labels, invalid roles, and aria‑hidden misuse. Educate your team.
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<label>, <fieldset>, <legend>, and proper input types (email, tel, date) that convey meaning to browsers and assistive technologies. Screen readers announce these semantics, helping users understand the form's structure. Semantic HTML also enables better autofill behavior, mobile keyboard optimization, and improved SEO.aria-required="true" for required fields, aria-describedby linking inputs to help text, aria-invalid for error states, role="group" on fieldset elements, and proper aria-labelledby references. These attributes ensure screen readers provide complete context to users navigating your form.<fieldset> groups related form controls together, and <legend> provides a descriptive label for the entire group. For radio button and checkbox groups, this is essential—screen readers announce the legend before each option, helping users understand the context (e.g., "Preferred Contact Method: Email, Phone, Mail"). This builder automatically wraps grouped inputs in fieldset elements.autocomplete attribute helps browsers automatically fill in user information (names, addresses, credit card details) from saved data. For users with motor impairments or cognitive disabilities, this dramatically reduces the effort required to complete forms. WCAG 2.1 Success Criterion 1.3.5 requires identifying input purpose, and proper autocomplete values satisfy this requirement.for attribute (explicit association) links to the input's id—this is more reliable and works across all assistive technologies. Implicit association (wrapping <input> inside <label>) is simpler but less robust. This builder uses explicit for/id association, which is the W3C recommended approach for maximum compatibility.for with htmlFor and class with className. For Vue, the HTML works as-is in templates. The semantic structure remains identical across frameworks, and you can layer your framework's state management on top.Paste an HTML snippet and check for common ARIA mistakes: missing labels, invalid roles, and aria‑hidden misuse. Educate your team.
Paste HTML snippet and highlight interactive elements missing accessible labels. Quick a11y audit.
Paste an SVG and check if the graphic‑aria roles are used correctly. Improve accessible diagrams and icons.
Validate a language tag like en‑US or zh‑Hans against the IANA registry. Ensure correct HTML lang attribute.
Convert plain text into HTML‑safe strings by escaping <, >, &, and quotes. Insert into code safely. Local copy.
Create a 5‑star rating widget using only HTML and CSS. Customize colors and size. Copy the clean code.
Convert plain text lines into HTML ordered or unordered lists. Instantly copy the generated HTML to paste into your website. No hassle, fully browser-based.
Instantly convert plain text into HTML‑safe escaped characters for secure display in web pages. Prevent cross‑site scripting. All processing local.
Enter a text color and background color and instantly see if the combination passes WCAG AA and AAA ratio. Safe colors.
Enter an HTML snippet and see a rough transcription of what a screen reader might announce. Check alt texts.
Pick a base color and generate a 10‑step scale where each step meets a specific contrast ratio against white or black. Export as CSS custom properties.
See how a PWA can extend content into the title bar area on desktop. Customize the window controls overlay.
Search common dream symbols and their traditional meanings. For entertainment and self-reflection. Static data.
Paste JavaScript and catch syntax errors instantly with line numbers. Lightweight pre‑commit check. Local.
Generate a grand, aristocratic title like 'Duke of Waffleshire'. Perfect for silly fun or RPG characters. Local.
Build a simple decision tree by adding yes/no nodes. Flowchart style. Export as text outline.
Paste a WebVTT file and instantly check for syntax errors. Validate timestamps and cue formatting. Essential for video devs.
Paste a string of weather emojis and get a written weather forecast. Fun and educational emoji tool.
Paste your manifest.json and instantly validate it against the W3C spec. Catch errors and warnings. Client‑side.
Create SEO‑friendly slugs that handle characters from any language. Removes accents, converts Cyrillic, Greek, etc. to Latin. Local.
Convert .srt subtitles to .vtt format for web video players. Preserves all timestamps and formatting. Local.
Enter any number up to trillion and get the English word representation. For filling out checks or legal documents.
Paste any DNS record and check if its format is valid for the selected record type (A, AAAA, CNAME, MX, TXT, SRV). Prevents typos.
Build a 3D card flip effect and toggle backface‑visibility. See the hidden back face. Copy the complete CSS.
Set your birth date and see a live countdown with days, hours, minutes, and seconds. Shareable link. Pure frontend.
Paste a set of hex colors and simulate how they appear with common color vision deficiencies. Get contrast warnings.
Calculate the perceived brightness of an RGB color and determine if black or white text is more readable. Accessibility tool.
Interactive visual guide to figure out if a door is left-handed or right-handed. Click through steps. Avoid ordering the wrong door.
Enter original and target color to compute the exact CSS hue‑rotate(deg) filter needed. For precise icon and image tinting.
View the moon phase for any date in past or future. See full moon dates and eclipses for a given year.