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
DevToys Alternatives
Apps similar to DevToys include CyberChef, which is free and open source. Other options are Omni Tools, CodePrettify, DevToys for Mac and Boop. There's no shortage of JSON Viewers like DevToys, with more than 50 alternatives for the web, Mac, Windows, Linux and iPad.
Alternatives list
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
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
errno.help is a free, text-first collection of IT and developer reference tools: a CIDR/IPv4 calculator, JWT decoder, hash generator (SHA-256/1/MD5), UUID and password generator, YAML/JSON converter, cron parser, DNS/WHOIS/ASN/GeoIP lookups, a Windows error code and event ID...
Cost / License
- Free
- Open Source (MIT)
Platforms
- Online
Azerbaijan
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
RandomText is a tool designers and developers can use to quickly grab dummy text in either Lorem Ipsum or Gibberish format.
Cost / License
- Free
- Proprietary
Platforms
- Online
R
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
Lipsum.com is one of the oldest, fastest and most reliable random text generators on the net. It's great for developers who need filler text for mockups, just press the 'Generate Lorem Ipsum' button and it provides 5 paragraphs of well formatted text with a Latin...
Cost / License
- Free
- Proprietary
Platforms
- Online
Econ Ipsum is an Economics-themed Lorem Ipsum generator. It was built in Python using a dictionary of words and terms contained in the abstracts of all papers published in Econometrica from 1933 to 2019.
Cost / License
- Free
- Open Source
Platforms
- Online
Chain string transformations into visual pipelines with live previews. 246 utilities as a web app, CLI, HTTP API, MCP server and browser/VS Code extensions.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Online
- Google Chrome
- Visual Studio Code
- JavaScript
- Typescript
- npm
- United States
+2
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
A secure, local-first browser extension that packs essential developer utilities, JSON formatters, and JWT decoders directly into your toolbar.
Cost / License
- Free
- Proprietary
Platforms
- Online
- Google Chrome
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