3,929 tools
Free planCode
JMH (Java Microbenchmark Harness) is an OpenJDK code-tools project for building, running, and analyzing nano- through macro-scale benchmarks on the JVM. It helps Java and JVM language authors measure performance with controlled warmup, forked JVMs, and statistical aggregation.
Free planCode
JMLOK 2.0 is a research tool that checks Java programs annotated with JML contracts by generating random tests, building oracles from specifications, and categorizing nonconformances. It ships downloadable binaries and a reference manual for Windows, Linux, and macOS.
Free planCode
Its APIs support recording expectations, verifying interactions, and replacing implementations during out-of-container Java EE or Spring tests.
Free planCode
jMonkeyEngine is an open-source, cross-platform 3D game engine for Java developers who prefer code-first workflows. It provides rendering, physics, and asset pipelines with community showcases, documentation, and GitHub-hosted sources for building desktop and mobile games.
Free planCode
JokeAPI is a REST API that serves consistently formatted jokes from many categories without API tokens, membership, registration, or payment. It supports filters for language, category, and content flags, and returns JSON, XML, YAML, or plain text for easy integration into apps and bots.
Free planCode
Jolokia exposes JMX MBeans over HTTP using JSON, acting as a lightweight agent for JVM, Jakarta EE, and OSGi platforms. It adds features such as bulk requests and fine-grained security policies compared with classic JSR-160 connectors.
Free planCode
Jooby is a modular Java and Kotlin web microframework emphasizing fast startup, simple routing, and scalable deployment. Applications define routes in concise Kooby or Jooby classes and run embedded servers suitable for modern HTTP services.
Free planCode
jOOQ generates type-safe Java code from your database schema and provides a fluent API for composing SQL in Java. It targets teams that prefer SQL-centric data access with compile-time checking instead of stringly-typed queries or heavy ORM mapping.
Free planCode
jqwik brings property-based testing to Java and Kotlin on the JVM, generating randomized inputs to falsify incorrect assumptions about code behavior. Developers write properties with annotations while jqwik shrinks failing cases and integrates with JUnit Platform.
Free planCode
Sites reference versioned jsDelivr URLs to serve libraries globally with emphasis on performance, reliability, and security monitoring.
Free planCode
json2go is a browser-based parser that converts JSON into Go struct definitions. It runs as a lightweight web app with WebAssembly support, helping Go developers scaffold types from sample JSON payloads during API integration work.
Free to startVideo
JSON2Video is a video automation API that renders templates and variables into MP4 outputs for ads, social clips, and product videos. Developers send JSON payloads to cloud endpoints with text-to-speech voices, component libraries, and credit-based billing.
Free planCode
jsonapi-rb is a Ruby ecosystem for efficiently producing and consuming JSON:API documents, complementing related gems for serialization and routing. The GitHub repository hosts source code, issues, and integration guidance for Rails and Ruby API projects.
Free trialCode
JsonFabrica is an API-first platform for generating realistic synthetic JSON test data from reusable templates with placeholder functions. Teams describe record shapes once, call authenticated generate endpoints, and reproduce outputs using stored seeds without touching production data.
Free planCode
JSONFix is a free browser tool to format, validate, and minify JSON, with an AI Fix mode that repairs common syntax errors. Users paste broken JSON and get cleaned output without creating an account on the public page.
Free planCode
JSONing is a free online toolkit for working with JSON, offering formatters, validators, merge and compare utilities, JSONPath testers, and a mock API generator. Developers can prototype fake REST resources in the browser or download the open-source mock API for local use.
Free planCode
JSON-to-Proto is a free web utility that converts sample JSON into Protocol Buffer message definitions. Paste JSON on the left and the tool generates a Protobuf schema on the right, with options such as inline definitions, snake_case field names, and merging similar objects.
Free planCode
JSON to Table is a browser-based converter that turns nested JSON, arrays, and hierarchical API responses into readable HTML tables. Users paste or upload JSON, preview nested structures, and export table views for documentation or analysis.
Free planCode
It implements the WHATWG HTML5 parsing algorithm and includes safelist-based cleaners to mitigate XSS when handling untrusted markup.
Free planCode
JSpecify defines standard, tool-independent annotations for nullness and static analysis semantics in Java code. The community project publishes specification docs, Javadoc, and artifacts so libraries and analyzers share consistent contracts.
Free planCode
juCi++ is a lightweight, cross-platform C++ IDE built on libclang and LLDB for code navigation, completion, and debugging. The GitLab project ships CMake and Meson-based builds targeting modern C++ standards on Linux, macOS, and Windows.
Free planDeveloper tools
Judge0 is an open source, sandboxed online code execution engine for humans and AI agents. It powers competitive programming, e-learning, assessment, and IDE products with support for many programming languages and a documented HTTP API.
Free tier unknownCode
Jumpstart Pro is a commercial Ruby on Rails (and companion iOS and Android) app template from Chris Oliver’s team. It bundles authentication, multitenancy, payments, TailwindCSS, admin dashboards, and API scaffolding so founders ship SaaS products without rebuilding common boilerplate.
Free planAssistant
Junction is a healthcare data platform that unifies nationwide lab testing and wearable device streams through one API. Teams integrate 300+ devices, build custom lab experiences across U.S. states, and scale diagnostic workflows with HIPAA-oriented operations support.
Showing 2,400 of 3,929 tools
Plan facts carry individual sources and check dates. Unknown values are excluded from required filters.