YAML to JSON Schema Converter - Online OpenAPI Infer Structure
Paste a YAML example and generate a JSON Schema draft that matches the structure. Helps build API specs. Pure client-side inference.
UD5 Toolkit
Generate JSON‑LD structured data for blog posts & news articles — Google‑ready
<script type="application/ld+json"> block and that the data is consistent across all blocks.<head> or <body> of your HTML. Google recommends placing it in the <head> section for cleaner code organization, but the <body> works equally well. Most CMS plugins (like Yoast SEO, Rank Math) insert it in the <head> automatically.Paste a YAML example and generate a JSON Schema draft that matches the structure. Helps build API specs. Pure client-side inference.
Paste CSV data and instantly get a formatted MediaWiki table code. Ideal for Wikipedia editors and internal wikis.
Paste the content of an XML sitemap and extract a plain list of all the URLs. For further analysis. Local.
Parse an iCalendar file and output the events as a clean JSON array. For developers integrating calendar data. Client‑side only.
Paste a MySQL ENUM definition and get a TypeScript union type string literal. For type‑safe database schemas.
Convert between scientific notation (a × 10^n) and decimal form. Also supports engineering notation. Instant, local.
Transliterate English text into Anglo‑Saxon runes (Futhorc). Different from Elder Futhark. For history and art.
View thousands of digits of Euler's number (e). Click to copy a block. For math enthusiasts.
Check if a number of the form 2^p‑1 is a Mersenne prime. Quick Lucas‑Lehmer test simulation for small p.
Fetches a random Wikipedia article summary via API. Read interesting facts. Simple knowledge discovery tool. No data collected.
Paste N‑Triples data and convert it to a compact JSON‑LD representation. Work with linked open data. Local.
Convert JSON‑LD structured data into Turtle (TTL) notation. For semantic web and linked data developers. Client‑side.
Create a Review or aggregateRating structured data. Perfect for star ratings in search results. Copy the code.
Create a Product structured data with reviews, price, and availability. Boost your ecommerce visibility in search.
Build a complete Event structured data with performer, location, and dates. Get Google‑ready JSON‑LD for tickets.
Generate a LocalBusiness structured data snippet with name, address, phone, and opening hours. Boost local SEO.
Create a breadcrumb schema for your website. Fill in the pages and get the ready‑to‑paste JSON‑LD snippet for rich results.
Paste a GraphQL SDL schema and get auto‑generated Markdown documentation. Perfect for API docs. All local.
Create a sticky scroll progress bar for blog posts. Choose colors and height. Copy the minimal CSS and HTML.
Generate a plausible technical blog post title. Useful for practice writing or placeholder content. All local.
Paste your JSON‑LD or Microdata and test it against Google's Rich Results criteria. Get warnings. Local linter.
Add columns with types and constraints, then generate a SQL CREATE TABLE statement. Supports MySQL/PostgreSQL.
Build a recipe rich snippet by filling out ingredients, cook time, and nutrition. Get the valid JSON-LD code.
Enter your FAQ questions and answers, and get ready‑to‑paste JSON-LD structured data. Boost search appearance.
Create JSON-LD structured data snippets for articles, products, and events. Fill in fields and copy the code. SEO helper.
Execute GraphQL queries against any endpoint with variables and headers. Explore schema via introspection. All requests made directly from your browser.