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Base64 Encoder / Decoder Encode any string to Base64 — or decode a Base64 string back to its original text. Used in URLs, basic auth, data: URIs, JWTs, email attachments, and just about everywhere data needs to travel as text. Input Text to encode or decodeModeEncode (text → Base64)Decode (Base64 → text)URL-safe encode (Base64Url)URL-safe decode […]
HTTP Header Analyzer Paste raw HTTP response headers (from curl, browser DevTools, or any tool) and instantly see an audit: status code, caching policy, security headers, compression, and redirects. Spot misconfigurations that hurt performance, SEO, and security. Paste Raw Headers Paste headers (one per line, Header-Name: value) Header Audit Audit appears here How to use […]
Schema Validator (JSON-LD) Paste any JSON-LD structured-data block and instantly validate the JSON syntax, check required @context and @type fields, flag common missing required properties for the schema type, and link to Google\u2019s official Rich Results Test for the live URL. Paste JSON-LD Block Paste your JSON-LD structured data Validation Report Validation report appears here […]
Is It Down? Site Status Checker Enter any URL to instantly check whether a site is down for everyone — or just for you. One-click links to the major outage trackers, DNS checkers, status pages, and SSL inspectors. URL or domain Website URL or domain Status Check Links Enter a URL to generate status checks […]
Mobile-Friendly Test Paste a page\u2019s HTML and instantly see how it renders at every common mobile breakpoint — iPhone SE (375px), iPhone Pro (390px), Pixel (412px), iPad (768px). Plus an audit of viewport meta, font sizes, and tap-target spacing. Paste HTML Paste page HTML source
Website Links Count Checker Paste any page\u2019s HTML and instantly see the total link count, broken down by internal vs. external, dofollow vs. nofollow, and anchor-text quality. Spot links that bleed authority and pages with too many or too few outbound links. Paste HTML Paste page HTML source
Google Cache & Wayback Checker Enter any URL to instantly generate one-click links to Google\u2019s indexed cache, the Internet Archive Wayback Machine, and Google\u2019s site: search — the three best ways to confirm your page is indexed, see when it was last crawled, and check historical versions. URL to check Page URL Cache & Archive […]
Page Size Checker Paste a page\u2019s HTML and instantly see total weight, breakdown by content type (HTML, scripts, styles, images), and Core Web Vitals implications. Fast pages rank higher and convert more — knowing your weight is step one. Paste HTML Paste page HTML source
HTML Sitemap Generator Paste a list of URLs and instantly generate a clean, browsable HTML sitemap page — automatically grouped by section and styled for direct copy-paste into your site. Helps users find pages and search engines discover deep content. Your URLs URLs (one per line)Group byFirst path segment (recommended)No grouping (single list) HTML Sitemap […]
Spider Simulator (Bot’s-Eye View) Paste a page\u2019s HTML and see what a search-engine crawler actually reads: clean visible text, every link with its anchor text, image alt attributes, and the rendered title and meta description. Spot hidden content issues before they hurt your rankings. Paste Page HTML Paste full HTML source (View Source → copy)