Keyword Extractor - Online Rapid Text Analysis
Paste any article and get a list of the most relevant keywords using a simple TF‑IDF‑like model. Skip stop words. All local.
UD5 Toolkit
Analyze keyword frequency in your text to improve on-page SEO. Paste your content and instantly get density metrics.
| Keyword | Count | Density % |
|---|
Paste any article and get a list of the most relevant keywords using a simple TF‑IDF‑like model. Skip stop words. All local.
Enter a URL and get a one‑page report of titles, description, headings, image alts, and broken links. All from browser.
Paste HTML or Markdown to count total words, unique words, heading distribution, and reading time. Content audit helper.
Paste text to compute reading ease and grade level using Flesch-Kincaid, SMOG, and ARI. Improve your writing clarity. All in browser.
Analyze text for subjective and emotionally charged words. Helps identify potential bias in writing. Purely heuristic, local operation.
Paste text to accurately count sentences, average sentence length, and longest sentence. For editors and writers.
Enter a URL and fetch its text/background colors to perform a bulk contrast check. See warnings for WCAG violations.
Paste text with mixed Arabic/Hebrew and English. See the Unicode bidi class of each character and ordering. i18n debugger.
Compute multiple readability scores (Flesch Reading Ease, Grade Level, ARI, SMOG). Paste any English text and see which grade level it's suitable for. Local.
Find out if a word is an isogram (no repeating letters). Different types: first-order, second-order. Word nerd fun.
Paste text and get a rough analysis of its emotional tone (happy, sad, angry, etc.) based on keyword matching. Local.
Paste your email body and subject, and get a spam score based on common trigger words and patterns. Improve your cold outreach.
Drop a PDF and count the total words, characters, and pages. Text extraction is done locally. Privacy‑friendly.
Type text and set a gradient, then check contrast against a solid background. Ensure readability.
Enter a URL and extract the font stacks and web font URLs used on that page. Quick typography research.
Analyze letter/symbol frequency with an interactive bar chart and heatmap. Useful for breaking simple ciphers, linguistics, and SEO keyword analysis. Local processing.
Detect browser support for font‑tech() and font‑format() values in @font‑face src. Check COLRv1, variable, etc.
Enter a URL and fetch its Twitter card meta tags. See a live preview of how the tweet will appear. Debug social sharing.
Compare text‑rendering: auto, optimizeSpeed, optimizeLegibility, geometricPrecision. See kerning and ligature changes live.
Upload a PDF and quickly see which pages contain color and which are pure black & white. Helps optimize printing.
Type directly into a contenteditable div with real‑time CSS filters, shadows, and colors. Download as HTML. Fun demo.
Extract selectable text from a PDF using the browser's built‑in PDF rendering. Copy or download as TXT. No upload, fully private.
Extract plain text from a PDF file entirely in the browser using PDF.js. No file upload to server. Supports multi-page extraction and search.
Check if a website is globally reachable or experiencing issues. Status code and latency displayed. Quick browser-side test.
Strip HTML tags and convert web content to plain Markdown. Preserve headings, lists, and links. Perfect for content migration. All processing in browser.
Drop a PDF and extract the full text content. Processed locally using PDF.js. No upload. Fast and private.
Paste a Content‑Security‑Policy header and get a human‑readable breakdown. See potential risks and suggestions.
Check if the current page can be loaded offline by examining the service worker cache. Developer tool for PWAs.
Inject dynamic messages into ARIA live regions and monitor how they trigger screen reader announcements. Debug a11y.
Extract text from images using basic OCR technology. Works best with clear, printed fonts. Completely local, images never leave your browser for privacy.