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Analyze a raw email or .eml file locally: SPF/DKIM/DMARC results, sender spoofing, Reply-To and display-name tricks, hidden links, dangerous attachments and scam language, with an optional live SPF/DMARC DNS check. No API key required.
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Inspect URL warning signs locally: misleading domains, hidden destinations, shorteners, HTTP, IP addresses and suspicious patterns. Includes an explained warning score, copy result and JSON report. No API key required. URL heuristics only:
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Port lookup and Nmap-powered TCP/UDP scanning, optional service-version detection and OS fingerprinting. Requires the separate Python + Nmap engine. Scan authorized targets only.
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Turn class notes into summaries, flashcards, quizzes, and daily study plans with a free AI personal tutor that works in your browser.
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Solve math, physics, chemistry, biology, and programming problems with clear, step-by-step explanations—for free.
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Summarize notes, articles, or text files with adjustable summary lengths. Get a concise overview, key points, and top keywords in seconds.
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Encode and decode Base64 for text, files, and images with full UTF-8 support. Includes URL encoding, MD5 hashing, SAML tools, and JSON formatting—for free.
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Calculate IPv4 and IPv6 subnets, host ranges, masks, reverse DNS zones, and adjacent networks with this free CIDR tool.
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Format messy or minified code in 20+ programming languages with automatic language detection, clean indentation, and consistent spacing—for free.
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Write and test HTML, CSS, and JavaScript with live previews and a built-in console for output and errors—all in a free online playground.
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Convert numbers between binary, octal, decimal, hexadecimal, and custom bases from 2–36. Supports large numbers, negatives, and fractions—for free.
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Remove PDF pages, PPTX slides, or form-feed text pages, and combine selected images into a PDF—all locally in your browser. Export Word and Excel files to PDF first.
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