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Online Crypto and Dev Tools | JavaInUse

Online Crypto and Dev Tools


Crypto and Hashing

Encrypt, decrypt, sign, and hash with browser-based tooling.

JWT Generator Build signed JSON Web Tokens JWT Decoder Inspect and validate JWT payloads Bcrypt Generator Hash and verify passwords MD5 Checker Create and validate MD5 hashes RSA Encrypt/Decrypt Encrypt, decrypt, and generate RSA keys AES Encrypt/Decrypt AES CBC/ECB encryption and decryption ChaCha20 Cipher 256-bit key, 96-bit nonce stream cipher PGP Encrypt/Decrypt Generate PGP keys and exchange messages Triple DES Encrypt and decrypt with 3DES (CBC/ECB) HMAC Generator Compute HMAC with SHA-256 or SHA-512 Jasypt Passwords Encrypt, decrypt, and verify Jasypt strings

Encoding and Data Utilities

Encode, decode, measure sizes, and transform common formats.

Hex Encoder/Decoder Convert text to and from hexadecimal HTML Encoder Escape markup safely HTML Decoder Unescape HTML entities Grok Pattern Builder Author and debug Logstash grok rules JSONPath Evaluator Test JSONPath expressions and normalized paths XML <-> JSON Two-way XML and JSON conversion Java Decompiler View Java classes on the fly JSON -> Java POJO Generate getters/setters from JSON Text Size (Bytes) Measure string length with/without spaces JSON Size (Bytes) Check JSON payload footprint XML Size (Bytes) Measure XML size quickly UTF-8 Encoder/Decoder Round-trip text and UTF-8 bytes JSON -> NDJSON Convert collections to newline-delimited JSON Cron Generator Craft and copy cron expressions JSON -> YAML Convert JSON documents to YAML YAML -> JSON Transform YAML into JSON YAML -> POJO Generate Java models from YAML Regex Generator Compose regex patterns visually Regex Tester Debug expressions against sample text XML -> POJO Convert XML into Java classes Bash -> Batch Translate shell scripts to Windows .bat JSON -> TypeScript Generate TS interfaces from JSON

Config and Infra Converters

Transform properties, YAML, SQL, and schema definitions.

Properties -> YAML Turn application.properties into YAML Kubernetes YAML -> Terraform Convert manifests to Terraform HCL SQL -> MongoDB Translate SQL into Mongo queries JSON -> Kotlin Create Kotlin data classes

Language and Code Converters

Jump between languages and frameworks with one-click conversions.

JavaScript -> Python Translate JS snippets to Python Python -> JavaScript Convert Python into JS Python -> C++ Move Python logic to C++ Java -> Python Convert Java classes to Python C -> C# Translate C into C# JavaScript -> TypeScript Add static types to JS Java -> JavaScript Generate JS from Java code Java -> Go Convert Java to Golang Python -> Go Translate Python into Go Go -> Python Convert Go code to Python Kotlin -> Java Move Kotlin classes to Java Kotlin -> Python Convert Kotlin into Python Python -> Kotlin Generate Kotlin from Python Java -> Kotlin Translate Java to Kotlin Java -> C# Convert Java codebases to C# Java -> C++ Port Java classes to C++ C -> Python Convert C snippets to Python C -> C++ Upgrade C code to modern C++ Python -> R Jump from Python to R JavaScript -> jQuery Rewrite JS using jQuery helpers Scala -> Java Convert Scala codebases Java -> Scala Port Java logic to Scala C# -> Java Translate C# projects PHP -> Python Convert PHP scripts to Python C# -> Python Transform C# into Python C++ -> Java Convert C++ classes to Java Python -> Java Translate Python into Java Python -> C# Move Python code to C#

Identity and Utility

Network lookups, text helpers, and UUID generation/validation.

IP Checker Resolve domains to IP addresses Character/Line Finder Locate positions within text UUID v1 Generator Time-based UUIDs UUID v3 Generator Namespace + MD5 UUIDs UUID v4 Generator Random UUIDs UUID v5 Generator Namespace + SHA-1 UUIDs UUID Validator Check UUID structure and version UUID Version Checker Identify UUID variant and version

Formatters and Validators

Lint, prettify, and validate code and queries.

SQL Syntax Checker Validate SQL statements fast Python Code Tester Execute Python snippets safely React Formatter Prettify React JSX Kotlin Formatter Clean up Kotlin code Rust Formatter Format Rust source Perl Formatter Tidy Perl scripts Golang Formatter Format Go code SQL Query Optimizer Spot improvements in SQL queries

API and Protocol Helpers

Convert requests and schemas across stacks.

cURL -> Java Turn cURL commands into Java code cURL -> Python Generate Python requests cURL -> Spring Boot Produce Spring Boot REST code cURL -> ASP.NET Convert requests to ASP.NET cURL -> Angular Create Angular HTTP code cURL -> React Build React fetch/axios calls JSON -> Protobuf Map JSON requests to gRPC protos Protobuf -> JSON Flatten proto messages to JSON

Key and Certificate Utilities

Convert and package keys for SSH, TLS, and keystore workflows.

PPK -> PEM Convert PuTTY keys to PEM PEM -> PPK Create PuTTY-ready keys PEM -> OpenSSH Rewrap PEM keys to OpenSSH PEM -> DER Binary DER output from PEM PKCS#1 -> PKCS#8 Modernize RSA private keys PKCS#8 -> PKCS#1 Generate legacy key material JKS -> PEM Export PEM keys and certs from JKS PEM -> JKS Build Java keystores from PEM assets PFX/P12 -> PEM Extract keys and chains from PKCS#12

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