HTML Headings Outline Generator - Online From Webpage
Enter a URL and see a nested list of all headings (h1‑h6). Check your document structure for SEO and accessibility. Pure fetch.
UD5 Toolkit
Enter a URL and see a nested list of all headings (h1‑h6). Check your document structure for SEO and accessibility. Pure fetch.
Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.
Encode or decode data to/from Base58 (Bitcoin alphabet). Useful for cryptocurrency address generation testing. Fully local, no data sent.
Lay down a beat on a grid sequencer for kick, snare, and hi-hat. Play, loop, and adjust tempo. All sound via Web Audio API.
Create a basic Playwright script with browser launch, page navigation, and screenshot. Start E2E testing instantly.
Practice CSS selectors by targeting plates on a virtual restaurant table. 30+ levels. Perfect for beginners.
Structure your episode with timed segments. Includes call to action notes. Export as text.
Convert numbers between binary, octal, decimal, and hexadecimal bases. See real-time conversion as you type. Clean and simple programmer utility.
Start/stop timer per project to log hours. See daily and weekly totals. Data stays in localStorage. Export summary as CSV. No account needed.
Practice aligning grid items and tracks with the place‑items, align‑content, and justify‑content properties. Visual guide.
Searchable table of well‑known TCP and UDP ports with their services. Check 80, 443, 3306, and many more.
Paste CSV and get a beautiful HTML table with sortable headers (optional). Copy the full HTML/CSS snippet. Local.
Create colorful digital sticky notes on a corkboard. Drag, edit, and delete. Notes persist in local storage. No login.
Enter a domain and see public WHOIS info via a free API with rate limiting. Quick domain check.
Use SSML <mark> tags to fire events during TTS. See text highlighted as it is spoken. Understand speech synthesis timing. local.
Convert a simple black and white image into an SVG path using edge detection. Extract vector outlines. Local canvas processing.
Paste an SVG path d string and parse it into an array of commands and coordinates. Useful for animations.
Scroll a container and see how sticky elements behave. Adjust top, bottom, and scroll margins. Copy the code.
Keep track of stitches and rows for your knitting projects. Multiple counters with increase/decrease shortcuts. Data saved in your browser.
Answer questions and see typical milestones for 0-5 years. Educational reference for parents. Not a diagnostic tool.
Generate a CSS background that shows a baseline grid. Adjust line‑height and offset. Perfect for aligning text.
Place multiple grid items into the same cells to create overlapping layouts. Learn the technique visually. Copy code.
Log the hours you slept each night and rate the quality. See a weekly bar chart. Local storage.
Simulate different cache strategies (Cache First, Network First, Stale‑While‑Revalidate) and see responses. Learn offline patterns.
Paste CSV and get a list of SQL INSERT statements. Define table name and column mapping. All local conversion.
Record daily systolic/diastolic readings and pulse. See a trend chart. All data saved locally in your browser.
Calculate exact elapsed time between two dates in years, months, weeks, and days. Countdown or time already passed. Simple, visual, and local.
Enter any date and get its ISO week number, plus the start and end dates of that week. Quick reference.
Paste a SQL CREATE TABLE statement and extract just the column names as a CSV header row. For data migration.
Convert between Base32 encoded strings and hexadecimal. Work with low‑level data representations. All local.