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
Germany
EU
+2
JSONFormatter.org Alternatives
Sites and apps similar to JSONFormatter.org include DevToys, which is free and open source. Other options are Grayslate, JSON BANG!, JSON Crack and CodePrettify. JSON Viewers like JSONFormatter.org are a crowded field, with more than 50 alternatives for Mac, Windows, Linux, self-hosting and Android.
Alternatives list
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.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Google Chrome
+6
CapyToolkit is a collection of 45+ free browser tools engineered to run entirely client-side. All operations execute locally via native browser APIs, Web Workers, and WASM, ensuring that data, logs, and cryptographic keys never reach an external server.
Cost / License
- Free
- Proprietary
Platforms
- Windows
- Online
United States
+3
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
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
- United States
All-in-one developer toolbox with 25+ tools: JSON/CSV converters, encoders, generators & more. 100% free, no signup, no ads. Everything runs in your browser for complete privacy.
Cost / License
- Free
- Open Source
Platforms
- Online
Italy- EU
33 JSON Online Viewer alternativesJSON Online Viewer is a fast JSON tree visualizer. It is intended for small-to-medium sized JSON texts which are common in the online usage.
Cost / License
- Free
- Proprietary
Platforms
- Online
+1
DataLensia is a privacy-first, browser-based data toolkit that lets you visualize CSV datasets and work with JSON/NDJSON using tools like a JSON comparator, schema generator, editor, and converter — all processed locally.
Cost / License
- Free
- Proprietary
Application type
Platforms
- Online
+9
JSON Hero is an open-source, beautiful JSON explorer for the web that lets you browse, search and navigate your JSON files at speed. 🚀.
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Online
+2
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
Application allows to view and edit simple and complex JSON documents in spreadsheet view (like Microsoft Excel), preview images stored in Base64 JSON string, navigate through document hierarchy, etc. Also JSON and XML files can be exported (converted) to CSV, TSV, Microsoft...
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Online
- Software as a Service (SaaS)
J
JSON Fixer is an online tool designed to save developers time by automatically fixing invalid JSON copied from logs, printed output, or other sources. Unlike traditional JSON formatters, JSON Fixer handles common issues specific to programming languages, such as Python’s None...
Cost / License
- Free
- Proprietary
Platforms
- Online
- Global
India
