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All the networking, server, infrastructure, security, and development tools you need in one place

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Popular Tools

Cron Expression Translator
Convert cron expressions to plain English and vice versa
JSON Formatter & Validator
Validate, format, and visualize JSON data online with syntax highlighting. Instantly detect errors, adjust indentation, minify, and display tree views for easy JSON debugging and editing
Regex Tester
Test regular expressions online with live matching, group extraction, and replacement. Generate code for JavaScript, Python, Go, and more with flag settings and pattern debugging
IP Calculator
Calculate subnet mask, network address, broadcast address, and usable host count from CIDR notation. IPv4/IPv6 compatible IP calculator for efficient network design and planning
JWT Decoder
Decode JWT tokens and display header, payload, and signature separately. Inspect algorithm, expiration (exp), issuer (iss), and other claims for quick token analysis and debugging
Base64 Encode/Decode
Encode and decode Base64 strings online. Supports both standard Base64 and URL-safe Base64 variants for text and binary data conversion, API debugging, and data encoding tasks

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Developer Tools

JSON Formatter & ValidatorJSON DiffJSONPath TesterJSON Schema ValidatorJSON Schema GeneratorJSON to FormJSON ↔ CSV ConverterJSON to TypeScriptJSON to Go StructJSON to Rust StructJSON to Zod SchemaJSON to GraphQLJSON to MySQLYAML ⇔ JSON ConverterYAML ValidatorXML FormatterTOML FormatterHTML FormatterHTML to JSX ConverterHTML to PugJavaScript FormatterCSS Minifier/BeautifierCSS ↔ Tailwind ConverterSQL FormatterSQL to JSON/TypeScriptGraphQL FormatterGraphQL to TypeScriptSVG to JSXMarkdown PreviewText StatisticsText DiffText ExtractorText ManipulatorList ComparerRegex TesterLorem Ipsum GeneratorMock Data GeneratorCron Expression TranslatorCrontab GeneratorcURL ConverterHash GeneratorHMAC Generatorbcrypt VerifierCRC Checksum CalculatorChecksum VerifierAES Encrypt/DecryptRSA Key Pair GeneratorRSA Key InfoSSH Key Pair GeneratorSSH Key FingerprintJWT DecoderGit Commit Message Generator.gitignore GeneratorCHANGELOG GeneratorSemver CalculatorLicense PickerNginx Validator.htaccess TesterRewrite Rule Tester.env ValidatorGitHub Actions ValidatorTerraform HCL Formattersystemd Unit ValidatorPlaceholder Image GeneratorFavicon GeneratorImage Format ConverterCode to ImageSVG OptimizerSVG Path EditorSVG to CSSColor Picker & DictionaryColor Blind SimulatorCSS Gradient GeneratorCSS GeneratorDesign Token ConverterFont PreviewResponsive PreviewIcon SearchMeta Tag GeneratorStructured Data GeneratorNetwork Diagram GeneratorSQL Query Visualizer

Security

Password GeneratorPassword Strength CheckerRandom String GeneratorUUID GeneratorULID GeneratorTOTP Generator & VerifierPGP Key Pair GeneratorJWT GeneratorJWT Vulnerability CheckerCSP GeneratorCSP EvaluatorSAML DecoderOAuth 2.0 DebuggerSSL Certificate DecoderCORS Policy GeneratorPermissions-Policy GeneratorSRI Hash GeneratorHash IdentifierArgon2 Hasherscrypt Hasher3DES Encrypt/DecryptROT13 / ROT47 ConverterCaesar CipherVigenère CipherXOR CipherEntropy CalculatorFrequency AnalysisCisco Type 7 DecoderDefang / RefangLuhn Algorithm CheckerImage SteganographyCVE SearchCWE SearchCVSS CalculatorDefault Password LookupSecret ScannerSBOM ParserDockerfile LinterCookie AnalyzerHTTP Method CheckGraphQL ScannerHTTP Request Smuggling DetectorSubdomain FinderSubdomain Takeover ScannerDNS Takeover CheckerDNS Rebinding CheckerOpen Port AuditCloud Storage Permission CheckDomain Reputation Checker

Civil Engineering

Concrete Mix Design CalculatorRC Section CalculatorSeismic Response SpectrumSteel Section PropertiesSteel Weight CalculatorRC Column CalculatorBeam Deflection CalculatorSteel Connection CalculatorBuckling Load CalculatorTimber Wall Quantity CalculatorWelding Symbol ReferenceRebar CalculatorSection Modulus CalculatorBearing Capacity CalculatorPile Capacity CalculatorEarth Pressure CalculatorConsolidation CalculatorEarthwork Volume CalculatorLiquefaction AssessmentCBR CalculatorSoil Test OrganizerWind Load CalculatorSnow Load CalculatorSeismic Load CalculatorFloor Load CalculatorLoad Combination CalculatorCoordinate ConverterTraverse CalculatorLeveling CalculatorArea by CoordinatesClothoid Curve CalculatorVertical Curve CalculatorConcrete Quantity CalculatorRebar Quantity CalculatorPaint Area CalculatorFormwork CalculatorScaffolding CalculatorTile Layout CalculatorManning Flow CalculatorSlope CalculatorCross-Section Area CalculatorPavement Design CalculatorGutter Flow CalculatorStormwater Runoff CalculatorBuilding Coverage & FAR CalculatorFire Compartment CheckerEvacuation Distance CalculatorBuilding Code CheatsheetConstruction Unit ConverterSafety Sign ReferenceCrane Capacity CalculatorSling Wire Calculator

Reference

HTTP Status CodesPort NumbersDNS Record TypesReserved IP RangesCipher SuitesLinux CheatsheetPowerShell Cheatsheetsystemd CheatsheetVim CheatsheetRegular Expression CheatsheetCron Expression CheatsheetGit CheatsheetUseful One-LinersOpenSSL CheatsheetNmap Cheatsheettcpdump CheatsheetWireshark Display Filter Cheatsheetiptables / nftables CheatsheetBGP / Routing CheatsheetCIDR / Subnet ReferenceTLS Version ComparisonHTTP Security Headers CheatsheetOWASP Top 10 CheatsheetMITRE ATT&CK CheatsheetMetasploit CheatsheetReverse Shell CheatsheetTLD ListDocker CheatsheetKubernetes (kubectl) CheatsheetTerraform CheatsheetAnsible CheatsheetAWS CLI CheatsheetGoogle Cloud (gcloud) CheatsheetAzure CLI CheatsheetNginx Configuration CheatsheetApache Configuration CheatsheetSQL CheatsheetMIME Types ReferenceASCII / Unicode Referencecurl Cheatsheet