Software Alternatives & Startups

Top 5 Developer Tools in Web Development / Testing Tools

The best Developer Tools within the Web Development / Testing Tools category - based on our collection of reviews & verified products.

JSON Formatter Hub DevNestTools JSON Swiss JsonUtils.app Scanly.site

Summary

The top products on this list are JSON Formatter Hub, DevNestTools, and JSON Swiss. All products here are categorized as: We recommend LibHunt for [discovery and comparisons of open-source projects](https://www.libhunt.com/). Web Development / Testing Tools. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.
  1. Free online JSON formatter and validator. Format, validate, beautify, minify, auto-fix, view, compare, and export JSON in your browser.
    Pricing:
    • Free
    • Free Trial
    • JSON Formatter - JSON Formatter Hub - Free Online JSON Formatter & Validator
    • Compare JSON - JSON Comparison Tool – Compare Two JSON Objects
    • JSON to Code - JSON to TypeScript, Python & Go Code Generator

    #API Tools #Developer Tools #JSON

  2. Changelog software that turns GitHub commits into release notes your users actually see — inside your app. Built for founders and teams who ship fast.
    Pricing:
    • Paid
    • Free Trial
    • $35 / Monthly
    • AI Release Notes from GitHub - Connect your repo and ReleasePad reads your commits and PR descriptions, then turns them into user-friendly entries. Nothing publishes without your approval — you review, then ship. Never write release notes again.
    • In-App Changelog Widget - A 4.3kb embeddable widget that shows updates right inside your product — lighter than most logo files. One line of code, 30 seconds to install, nothing to maintain.
    • Public Changelog Page - A hosted, SEO-friendly page your users can bookmark, on your own subdomain. Built to be crawled by Google, ChatGPT, Claude, and Perplexity, with a Markdown endpoint for AI systems — plus analytics showing which updates users actually engaged with.

    #AI #Product Changelog #Changelog Featured

  3. Fast, free dev tools that run 100% client-side no signup
    • Free to Use - DevNestTools offers its suite of developer utilities without any cost, making it accessible for individual developers, students, and small teams who need quick tools without a budget for premium software.
    • Wide Range of Utilities - The platform provides a variety of tools such as formatters, converters, and generators (e.g., JSON formatter, Base64 encoder/decoder), allowing developers to handle multiple small tasks in one place instead of using several different websites.
    • No Installation Required - Since it's a web-based tool, users can access it directly through a browser without needing to download or install any software, making it convenient for quick, on-the-go tasks.
    • Simple and Clean Interface - The website is designed with simplicity in mind, allowing users to quickly find and use the tool they need without navigating through cluttered menus or complicated layouts.
    • Time-Saving for Developers - By consolidating common developer tasks like encoding, decoding, and formatting into a single website, it saves time compared to searching for separate tools or writing custom scripts for simple conversions.

    #Productivity #Web Tools #Developer Tools

  4. Professional JSON viewer, editor, and validator. Format, visualize, search, and manipulate JSON data with AI-powered repair, tree view, table view, and code generation in 12+ programming languages.
    Pricing:
    • Open Source
    • User-Friendly Interface - JSON Swiss offers an intuitive and easy-to-use interface, which makes it accessible for both beginners and experienced developers to quickly view and edit JSON data.
    • Syntax Highlighting - With syntax highlighting, JSON Swiss makes it easier to distinguish different elements of JSON data, improving readability and reducing potential errors.
    • Validation Features - The tool provides validation features that help users ensure their JSON data is correctly formatted before implementation.
    • Cross-Platform Access - Being a web-based tool, JSON Swiss can be accessed from any device with internet connectivity, providing flexibility and convenience.
    • Free to Use - JSON Swiss is available for free, allowing users to utilize its features without any financial commitment.

    #Developer Tools #Coding #JSON

  5. Free online JSON and XML tools. Format, validate, convert, diff, generate TypeScript interfaces, Pydantic models, and more. 100% client-side, instant, private.
    Pricing:
    • Free
    • Ease of Use - JsonUtils.app offers a simple, intuitive interface that allows users to quickly format, validate, and manipulate JSON data without a steep learning curve.
    • Free Access - The tool is available for free, making it accessible to developers, students, and hobbyists without any financial barrier.
    • Browser-Based Convenience - Being a web-based tool, it requires no installation or setup, allowing users to access it instantly from any device with an internet connection.
    • Multiple JSON Utilities - It combines several JSON-related tools such as formatting, validation, and conversion in one place, saving time compared to using multiple separate tools.
    • Quick Debugging - The tool helps developers quickly identify syntax errors or structural issues in JSON data, speeding up the debugging process during development.

    #Software Development #Developer Tools #XML Editor

  6. An advanced tool that provides a comprehensive report on a website's SEO, Accessibility, Security, and Best Practices by leveraging AI analysis.
    Pricing:
    • Freemium
    • AI-Powered Comprehensive Audit Engine - Scanly's core feature analyzes your entire website across 4 critical dimensions—SEO, performance, accessibility, and security—in under 60 seconds. The AI engine doesn't just identify issues; it contextualizes them, prioritizes by impact on rankings and user experience, and provides specific, actionable fixes.
    • Core Web Vitals & Performance Optimization - Deep-dive analysis of Google's ranking factors including Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP). The system identifies render-blocking resources, oversized images, inefficient code, and provides specific recommendations for optimization.
    • Professional Client-Ready Reports - Generate white-label PDF reports that communicate complex technical issues in language your clients understand. Reports include executive summaries, visual issue breakdowns, prioritized action items, and competitor comparisons—perfect for sales pitches, monthly retainers, or client onboarding.

    #SEO #SEO Tools #SEO Auditing 1 user reviews

  7. One API for 80+ AI models — LLM, image, video & music — priced up to 80% below the official APIs. Pay only for successful calls; failed runs refunded; credits never expire.
    • Pricing - Up to 80% below official APIs, from $0.0046/call
    • Billing - Pay only for successful calls; failed runs refunded
    • Models - 80+ models across LLM, image, video & music

    #AI Tools #Developer APIs #Machine Learning Featured

Related categories

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