🧰 62 tools · 100% in your browser · free
Developer & security tools that just work — right in your browser.
From JWT decoding, AES encryption, hashing & HMAC to QR, regex, secret scanning & converters — everything runs inside your browser, with no server and no data ever leaving your device. Free, for everyone.
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🔒 On-device⚡ Instant✅ Tested🆓 No ads
Scanners 10
🔍Dependency Vuln ScannerScan a lockfile for known CVEs via the OSV.dev database.→🛡️Website Security ScannerGrade a live site's security headers, HTTPS & cookies.→🌐DNS & Email SecurityLook up DNS records + check SPF, DMARC, DNSSEC & CAA.→🐳Dockerfile LinterLint a Dockerfile for security & best-practice issues.→🔏TLS / SSL CertificateInspect a domain's certificates & expiry from CT logs.→📍IP LookupGeolocate an IP/domain + ASN, org & reverse DNS.→📇Domain WHOISRegistrar, dates, status & nameservers (via RDAP).→🔀CORS CheckerTest a site's CORS policy for misconfigurations.→📋HTTP Header ViewerFetch a URL and view all raw response headers.→🤖AI Security ExplainerExplain a CVE, header, or finding in plain English (AI).→
Security 15
🎫JWT Decoder & VerifyDecode a JWT and (optionally) verify its HS256 signature.→🏷️JWT Generator (HS256)Create & sign an HS256 JWT from a payload + secret.→🔒AES EncryptionEncrypt & decrypt text with AES-256-GCM + a password (PBKDF2).→#️⃣Text HashCompute MD5, SHA-1, SHA-256, SHA-512 of text at once.→📂Hash FileCompute SHA-256/SHA-1/SHA-512 of a file (integrity check).→🔑HMAC-SHA256Compute HMAC-SHA256 of a message using a secret key.→🎲Password GeneratorGenerate strong random (cryptographic) passwords + entropy meter.→🛡️Password StrengthEstimate password strength & how long it would take to crack.→🕵️Secret ScannerDetect leaked API keys, tokens & private keys in text or .env.→🧱Security Headers AnalyzerGrade HTTP response headers for CSP, HSTS, X-Frame & more.→📊CVSS 3.1 CalculatorCompute a CVSS v3.1 base score, severity & vector.→🎰Random Token GeneratorGenerate cryptographically-random tokens (hex/base64/url).→🗝️.env AuditorAudit a .env file for secrets, weak values & mistakes.→🛢️SQL Safety LinterFlag SQL-injection-prone patterns in your own queries.→📑HTML Security CheckerScan HTML for XSS-prone & accessibility issues.→
Encode / Decode 9
🔡Base64Encode & decode Base64 text (UTF-8 & URL-safe).→🔗URL EncodeEncode & decode URL components (encodeURIComponent).→🏷️HTML EntitiesEncode & decode HTML entities to display < > & on the web.→⤵️Escape StringEscape & unescape JSON/JS-style strings (\\n, \\t, \\uXXXX).→🖼️Data URI (Base64 Image)Convert image ↔ base64 Data URI to embed in HTML/CSS.→🔣Hex ↔ TextConvert text to hexadecimal and back (UTF-8).→🔠Base32Encode & decode Base32 (RFC 4648).→🅱️Base58Encode & decode Base58 (Bitcoin alphabet).→🔤Unicode EscapeEscape text to \\uXXXX and back, with code points.→
Format & Data 13
📦JSON FormatterBeautify, minify, & validate JSON with error messages.→🔍Regex TesterTest regex, highlight matches, view capture groups.→↔️Text DiffCompare two texts line by line (added/removed).→🔢Number Base ConverterConvert numbers between binary, octal, decimal, hexadecimal.→📊JSON → CSVConvert a JSON array of objects into a CSV table (Excel-ready).→🧾CSV → JSONConvert CSV (with a header) into a JSON array of objects.→🧩JSON → YAMLConvert JSON into clean, valid YAML.→🔃YAML → JSONConvert YAML (common subset) into JSON.→🧠JSON → TypeScriptGenerate TypeScript interfaces from sample JSON.→🗂️XML FormatterPretty-print, minify & validate XML.→🧬JSON → XMLConvert a JSON object into XML.→🗄️SQL FormatterFormat & indent SQL queries for readability.→📘Markdown PreviewRender Markdown to a live HTML preview & copy the HTML.→
Generator 7
🆔UUID GeneratorGenerate random (cryptographic) UUID v4s, one or many.→📱QR Code GeneratorGenerate a QR code from text/URL & download as PNG.→📷QR Reader (Image)Upload an image containing a QR code to read its text/URL.→📄Lorem IpsumGenerate placeholder text (words/sentences/paragraphs).→🔖Meta Tag & Open GraphGenerate SEO, Open Graph, & Twitter Card tags + preview.→🪪ULID GeneratorGenerate sortable, timestamp-based unique IDs (ULID).→🧪Mock Data GeneratorGenerate fake rows (name, email, etc.) as JSON or CSV.→
Converters 8
⏱️TimestampConvert Unix timestamp ↔ date (local & UTC).→📅Cron ParserExplain a cron expression & show the next 5 run times.→🧭URL ParserBreak a URL into its parts + a query table.→📝Text & CaseChange capitalization, slugify, count words, sort/uniq/reverse.→🎨Color ConverterConvert colors between HEX, RGB, and HSL.→📐Unit ConverterConvert length, mass, temperature, & data sizes.→🌗Color Contrast (WCAG)Compute the contrast ratio of two colors & AA/AAA pass status.→🌈Color ShadesGenerate a tint & shade palette from one base color.→
Built by Ksatria Bintang Samudra · source code · every tool runs locally in your browser.