Web Share API Tester - Online Demo & Code
Test the Web Share API by sharing text, links, and files directly from the browser. Check compatibility and see example code.
UD5 Toolkit
Test the Web Share API by sharing text, links, and files directly from the browser. Check compatibility and see example code.
Test the Content Indexing API to add a page to the device's content feed. See how your PWA integrates with the OS.
Measure your internet connection speed by downloading and uploading a small test file. Works from your browser.
Enter a URL and see a simulated preview of how the link will appear on major social platforms. Check tags.
Enter a URL and see live mocked previews for Facebook, Twitter, LinkedIn, and Slack based on its meta tags. Find missing tags.
Enter a URL and view it in three iframes: mobile, tablet, and desktop side‑by‑side. Quick responsive check.
Inject dynamic messages into ARIA live regions and monitor how they trigger screen reader announcements. Debug a11y.
Create a QR code that lets people connect to your Wi‑Fi without typing a password. Just scan and join. Secure local.
Quickly estimate your internet connection speed by downloading a small test file. See class and recommendations.
Check if the current page can be loaded offline by examining the service worker cache. Developer tool for PWAs.
Paste multiple HTML snippets (header, footer) and a main content, then combine them into a single preview. Static site helper.
Paste your email body and subject, and get a spam score based on common trigger words and patterns. Improve your cold outreach.
Test the Fullscreen API: request fullscreen on a colored div, detect changes, and copy the JavaScript boilerplate.
Toggle content‑visibility: auto on long blocks and see the rendering time difference. Understand this powerful property.
Compare text‑rendering: auto, optimizeSpeed, optimizeLegibility, geometricPrecision. See kerning and ligature changes live.
Fetch a page and list all loaded assets (CSS, JS, images) with their sizes. See total page weight. Quick performance check.
Add web content to the device’s content index (like Google Discover). See the indexed items and delete them.
Compare font‑display values (block, swap, fallback, optional) on the fly. See how text renders during web font load. Choose the right strategy.
Check if the browser has captured the beforeinstallprompt event. Understand why your PWA is (or isn't) installable.
Paste a Content‑Security‑Policy header and get a human‑readable breakdown. See potential risks and suggestions.
Strip HTML tags and convert web content to plain Markdown. Preserve headings, lists, and links. Perfect for content migration. All processing in browser.
Paste HTML or Markdown to count total words, unique words, heading distribution, and reading time. Content audit helper.
Send HEAD requests to popular websites and measure the round‑trip time. Quick network health check. Client‑side.
Measure your typing speed in words per minute and accuracy. Random word prompts. Compare results over time. No data sent.
Split a long text into blocks of N characters or words. Perfect for token limits or social media threading.
Drop a PNG file and see all its chunks (IHDR, tEXt, etc.). Extract hidden text and color profiles. Pure JavaScript reader.
Turn your text into a random mix of upper and lower case letters. Great for pranks or silly posts. All local.
Drop a folder of images and convert all to the same format at once. Choose quality and download as ZIP. Local only.
Select a short video and convert it to an animated WebP image for faster web loading. Adjust quality and size. Local only.
Analyze text for keyword frequency and density. Highlights over-optimized terms. Perfect for content writers and SEO editors. Entirely browser-based.