SafeJSON
SafeJSON is an all-in-one local JSON toolkit built exclusively for developers. All parsing, comparison, JWT decoding and validation runs 100% inside your browser, with zero user data uploaded to external servers.
Core features include standard JSON formatter, visual JSON Diff, JWT token decoder, JSONPath query engine, and JSON Schema validator. It supports huge 50MB+ JSON files powered by Web Workers, dark mode, collapsible tree views, and one-click raw JSON export.
Users can independently verify full privacy via Chrome DevTools Network panel — no API keys, tokens or confidential payloads leave your device. The core toolset is permanently free, with advanced features (Diff & JWT) available via SafeJSON Pro ($5/month or $39/year). The full codebase is fully open-source on GitHub for full audit.
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Smart JSON Editor
Smart JSON Editor is a powerful application tailored for app and web developers to create, edit, and manage JSON data structures efficiently. It offers a comprehensive suite of features, including a JSON tree tool for intuitive data visualization, value transformers for generating and modifying JSON values, and an embedded HTTP server for testing within applications. Users can import and export JSON files via various methods such as file uploads, pasteboard, and iCloud integration. The application supports the creation of smart objects (classes) that maintain key structures, facilitating the organization of associative arrays. Additionally, Smart JSON Editor provides advanced functionalities like JSON Path navigation, API request management with group and endpoint hierarchies, and token transformers for dynamic value composition in API headers and parameters. It also features search and filter capabilities, an iCloud library for asset storage, local server connections, etc.
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InstaCharts
InstaCharts is a fast and intuitive data visualization tool designed to turn raw data into clear charts, graphs, and tables in seconds. It automatically analyzes uploaded data and recommends the most effective chart type, eliminating manual setup. Users can create professional visuals without design or coding skills, making data exploration accessible to everyone. InstaCharts supports multiple data sources, including Excel, CSV, JSON, Google Sheets, and Google Drive. Charts can be shared via public links, embedded on websites, or exported for reports and presentations. Real-time integrations ensure charts stay updated as underlying data changes. With extensive customization options, InstaCharts helps users match visuals to their brand and communication needs.
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JSON Crack
JSON Crack is an open source tool that transforms complex data formats, including JSON, YAML, CSV, XML, and TOML, into interactive, visually intuitive graphs, enhancing data comprehension and analysis. Users can input data directly, upload files, or provide URLs, and it automatically generates a visual tree graph. It supports data conversion between formats, such as JSON to CSV or XML to JSON, and includes features like JSON formatting, validation, and code generation for TypeScript interfaces, Golang structs, and JSON Schemas. Advanced tools are available for decoding JWTs, executing JQ queries, and performing JSON Path commands. Users can export visualizations as PNG, JPEG, or SVG files. All data processing occurs locally on the user's device, ensuring data privacy.
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