JSONLint Alternatives
JSONLint is described as 'JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format' and is an app in the development category. There are more than 25 alternatives to JSONLint for a variety of platforms, including Web-based, Mac, Linux, Windows and Self-Hosted apps. The best JSONLint alternative is DevToys, which is both free and Open Source. Other great apps like JSONLint are JSON BANG!, Omni Tools, JSON Sage and JSONViewerTool.
Alternatives list
Free and privacy-first online tools for developers, students, and creators — including IP lookup, Base64 decoder, JSON formatter, crontab generator and more.
Cost / License
- Free
- Proprietary
Platforms
- Online


+2
JSON Formatter Pro is a browser extension that helps you quickly format and validate JSON so it’s easy to read and debug. It prettifies/minifies JSON, highlights syntax, and makes it simple to inspect large JSON responses while working in APIs, web apps, and dev tools workflows.


+6
Online JSON Formatter and JSON Validator will format json data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON.
Cost / License
- Free
- Proprietary
Platforms
- Online



A powerful online JSON formatter, editor and validator with multiple visualization modes including code, tree, table and graph views, making JSON debugging and manipulation effortless.
Cost / License
- Free
- Proprietary
Platforms
- Online


+2
The JSON Formatter was created to help folks with debugging. As JSON data is often output without line breaks to save space, it can be extremely difficult to actually read and make sense of it. This tool hoped to solve the problem by formatting and beautifying the JSON data so...
Cost / License
- Free
- Proprietary
Platforms
- Online

A free web app providing 200+ online tools for developers, including JSON formatters, PDF mergers, code converters, data generators, and more—no signup required.
Cost / License
- Free
- Proprietary
Platforms
- Online
StringFlux is a free online tool for developers to simplify string transformations like JSON escape, Base64 encode, URL encode, and more — all in one streamlined, privacy-friendly interface.
Cost / License
- Free
- Proprietary
Platforms
- Online

ToolShelf is a lightweight collection of fast, browser-based developer utilities. All tools run entirely in your browser — no logins, no tracking, and full offline support.


+4
TurtlesTools JSON Formatter & Validator is an intuitive, easy to use and blazing fast JSON formatter & validator.
Cost / License
- Free
- Proprietary
Platforms
- Online

Online tool to Format, indent & beautify JSON text with syntax highlighting & ability to expand/collapse the objects in a tree like structure.
Cost / License
- Free
- Proprietary
Platforms
- Online
Every developer knows the pain of jumping between a dozen scattered online JSON tools just to get one job done. One site to format, another to validate, a third to convert, each with clunky, outdated interfaces and inconsistent behavior.
Cost / License
- Freemium
- Proprietary
Platforms
- Online







































