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Free online developer tools for testing and debugging. JSON formatter & validator, Base64 encoder/decoder, URL encoder, JWT decoder, Hash generator, UUID generator, Regex tester, Text diff tool, HTTP request tester, Lorem Ipsum generator, Password generator, Word counter, Data converter (CSV/JSON/XML), and more. Fast, secure, client-side processing. | 🚀 NEXOPAD: THE ALL-IN-ONE BROWSER WORKSPACE. NexoPad eliminates context-switching by unifying essential productivity tools directly in your browser sidebar. Built for developers, founders, and support teams. ⚡ SMART TEXT EXPANDER: Automate typing with dynamic variables like {{name}} or {{company}} extracted live from web pages. Includes a Visual Data Inspector to scrape info without coding and Spintax support for natural-sounding messages. 🤖 INLINE AI ASSISTANT (BYOK): Connect OpenAI, Claude, Gemini, or DeepSeek at wholesale API costs. Summarize, translate, and fix grammar directly on any webpage with one-click injection. 🔒 SECURE MARKDOWN VAULT: A local-first, PIN-encrypted vault for your snippets and notes. Includes a Web Clipper (Alt+C) and floating post-its that stay on top of other windows. ⌨️ POWER-USER NAVIGATION: Search everything with Ctrl+K Command Palette, inject snippets with // Spotlight, and organize your browser with forced tab renaming and link grouping. 🏢 B2B TEAM VAULTS: Share snippets and global company variables with your team using secure Role-Based Access Control. 🌍 GET STARTED: Visit nexopad.app to boost your productivity. |
JSON Formatter & Validator, Base64 Encoder/Decoder, URL Encoder/Decoder, JWT Decoder & Debugger, Hash Generator (MD5, SHA-1, SHA-256, SHA-512), UUID Generator (v4), Unix Timestamp Converter, Regex Tester with live matching, Color Converter (HEX/RGB/HSL), QR Code Generator, Text Diff Tool, HTTP Request Tester, Lorem Ipsum Generator, Password Generator, Universal Data Converter (CSV/JSON/XML), Word Counter & Reading Time | Smart Text Expander, BYOK AI Assistant, Secure Markdown Notes, Dynamic Variables, Web Context Extraction, Link & Tab Manager, Floating Post-its, Command Palette (Ctrl+K), Spintax Support, OpenAI & Claude Integration |
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It is the only complete API development environment, used by nearly five million developers and more than 100,000 companies worldwide.

Paw is a full-featured and beautifully designed Mac app that makes interaction with REST services delightful. Either you are an API maker or consumer, Paw helps you build HTTP requests, inspect the server's response and even generate client code.

It is a free chatbot platform to build bots quickly without any coding required. It allows you to build, manage, integrate, train, analyse and publish your personalized bot in a matter of minutes.

Combines API test-automation, mocks and performance-testing into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers. Besides powerful JSON & XML assertions, you can run tests in parallel for speed - which is critical for HTTP API testing.

Appwrite's open-source platform lets you add Auth, DBs, Functions and Storage to your product and build any application at any scale, own your data, and use your preferred coding languages and tools.

Keep tabs on all aspects of your API's performance with uptime monitoring, integration testing, logging and real-time monitoring.

Insomnia is a powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.

Give users new ways to interact with your product by building engaging voice and text-based conversational apps.

RESTful API Modeling Language (RAML) makes it easy to manage the whole API lifecycle from design to sharing. It's concise - you only write what you need to define - and reusable. It is machine readable API design that is actually human friendly.

Bots are third-party applications that run inside Telegram. Users can interact with bots by sending them messages, commands and inline requests. You control your bots using HTTPS requests to our bot API.