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.
UD5 Toolkit
Check your SVG accessibility in seconds. Ensure proper ARIA roles for graphics, symbols, and documents.
graphics-symbol (for icons/signs), graphics-document (complex standalone graphics), and graphics-object (sub-parts). They help screen readers interpret visual information correctly.role="img" with an aria-label or graphics-document makes the graphic perceivable and operable for all users.role="img" is a general image role. graphics-symbol is more specific for icons and simple graphics that convey a single idea (like a gear icon). It tells assistive tech that the graphic is symbolic, often used with aria-label for a short text alternative.<svg role="graphics-symbol" aria-label="Settings">...</svg>. The role defines the type of graphic, and the aria-label provides the accessible name.<svg>, missing accessible names when roles are present, and <g> elements without role="group" when they contain relevant structure. It also suggests roles based on element type (e.g., <path> with aria-label → graphics-symbol).role="img" or graphics-symbol where appropriate, and inserts an aria-label placeholder if missing. You should replace the placeholder with meaningful text.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.
Enter a text color and background color and instantly see if the combination passes WCAG AA and AAA ratio. Safe colors.
Create a fully accessible form by adding fields; the tool generates the proper labels, inputs, and ARIA attributes. Copy the clean HTML.
Validate a language tag like en‑US or zh‑Hans against the IANA registry. Ensure correct HTML lang attribute.
Paste your manifest.json and instantly validate it against the W3C spec. Catch errors and warnings. Client‑side.
Enter an HTML snippet and see a rough transcription of what a screen reader might announce. Check alt texts.
Paste a WebVTT file and instantly check for syntax errors. Validate timestamps and cue formatting. Essential for video devs.
Paste JavaScript and catch syntax errors instantly with line numbers. Lightweight pre‑commit check. Local.
Create a 5‑star rating widget using only HTML and CSS. Customize colors and size. Copy the clean code.
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.
Convert plain text into HTML‑safe strings by escaping <, >, &, and quotes. Insert into code safely. Local copy.
Build a 3D card flip effect and toggle backface‑visibility. See the hidden back face. Copy the complete CSS.
Instantly convert plain text into HTML‑safe escaped characters for secure display in web pages. Prevent cross‑site scripting. All processing local.
See how a PWA can extend content into the title bar area on desktop. Customize the window controls overlay.
Enter original and target color to compute the exact CSS hue‑rotate(deg) filter needed. For precise icon and image tinting.
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.
Automatically restore natural colors to a photo by removing color casts. Gray world algorithm. One‑click fix. Canvas.
Build a simple decision tree by adding yes/no nodes. Flowchart style. Export as text outline.
Paste any DNS record and check if its format is valid for the selected record type (A, AAAA, CNAME, MX, TXT, SRV). Prevents typos.
Convert .srt subtitles to .vtt format for web video players. Preserves all timestamps and formatting. Local.
Interactive visual guide to figure out if a door is left-handed or right-handed. Click through steps. Avoid ordering the wrong door.
Shift the color temperature of your photo towards warm (orange) or cool (blue). Instant canvas filter. Download result.
Search common dream symbols and their traditional meanings. For entertainment and self-reflection. Static data.
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.
Paste a string of weather emojis and get a written weather forecast. Fun and educational emoji tool.
Enter any number up to trillion and get the English word representation. For filling out checks or legal documents.
Create SEO‑friendly slugs that handle characters from any language. Removes accents, converts Cyrillic, Greek, etc. to Latin. Local.
Generate a grand, aristocratic title like 'Duke of Waffleshire'. Perfect for silly fun or RPG characters. Local.