The Best JSON Schema Alternatives in 2026

Mockium generates fake data from user-defined fields and schemas and can export results in formats such as CSV, SQL, JSON, and XML.

Mockaroo generates custom test datasets in CSV, JSON, SQL, and Excel formats, with an API mocking tool for software testing.

Coders Tool offers browser-based utilities for JSON, SQL, text, encoding, networking, time conversion, and data formatting.

libfolia provides a C++ library for processing data in the FoLiA format.

Fancy Badges provides customizable project badges in multiple formats through a maintained software fork.

The igraph site offers network analysis software and describes igraph as a network analysis package.

Heritrix 3 documentation describes configuration and use of the Heritrix web crawler.

Create and edit database diagrams with ChartDB, which can visualize schemas from a database query.

The LlamaIndex repository describes a document processing platform for AI applications.

Biome formats, lints, and checks web projects with a toolchain that includes hundreds of lint rules.

EditorConfig helps maintain consistent coding styles across different text editors through a shared file format.

Handle tasks such as JSON formatting, text comparison, and regular expression testing with DevToys, a desktop toolkit.

HandyAI offers developer utilities for token counting, prompt analysis, JSON tool use conversion, and cost calculation.

ToDiagram turns JSON, YAML, XML, CSV, and Mermaid into interactive diagrams and supports building custom node diagrams.

JSON Hero provides a web interface for reading and exploring JSON files.

The tidyverse is an integrated collection of R packages for data science.

Etebase provides an open-source, end-to-end encrypted SDK and backend for building applications that protect user data.

Apache Storm is an open-source distributed system for processing unbounded streams of data in real time.

Skyvern automates browser workflows across websites, including logins, form entry, and data extraction.

Netron displays neural network, deep learning, and machine learning models across formats such as ONNX, TensorFlow, and PyTorch.

SVG Path Visualizer displays SVG path data and explains the commands that shape its vector drawing.

Apache Atlas provides data governance and metadata management for Hadoop.

App DevTools groups browser-based tools for text, web code, encoding, validation, and data conversion tasks.

Test beta versions of apps and App Clips with Apple TestFlight; the listing says it is not currently accepting new testers.