Amulet Map Editor
NBTExplorer.net
NBT Studio
9minecraft
Geyser
Chunker
Minecraft
Universal Minecraft Editor is a software that allows you to modify the files of a minecraft world (NBT, items, mobs ...)

JSONLint
JSONFormatter.org
FreeFormatter
JSON Formatter & Validator
ExtendsClass JSON Formatter
Site24x7 JSON Formatter and Validator
betterjson.com
Code Beauty’s JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.

Which is more popular?
Based on our record, Universal Minecraft Editor seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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UME
Universal Minecraft Editor
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| Website | universalminecrafttool.com | codebeautify.org |
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What each product offers, as listed by its team.

No features have been listed yet.
Possible disadvantages
Walkthroughs and reviews on video.
Universal Minecraft Editor First Impression (New Free Minecraft Console Editing Tool)
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Universal Minecraft Editor and Code Beautify JSON Validator. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

If you're lazy you can use Universal Minecraft Editor (Windows only, can open worlds from mobile versions). Source: over 4 years ago
If you don't like the time limitation, you can additionally download Universal Minecraft Editor where you can manipulate the demo time (there are also tutorials on youtube for this). Source: about 5 years ago
You have to somehow extract the structure from world files (stored in LevelDB format so there is no one file which contains the structure). You can try Universal Minecraft Editor which is Windows-only but can handle worlds from Android... Source: over 5 years ago
Tracking Code Beautify JSON Validator since Jul 2021.
When comparing Universal Minecraft Editor and Code Beautify JSON Validator, you can also consider the following products.

The Amulet Map Editor is a new and innovative Minecraft map editor made by the Amulet Team, a team formed by the contributors that brought you MCEdit-Unified
Compare Amulet Map Editor to Universal Minecraft Editor or Code Beautify JSON Validator:

JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
Compare JSONLint to Universal Minecraft Editor or Code Beautify JSON Validator:

NBTExplorer is a free, open-source graphical editor for Minecraft NBT data, allowing users to edit world files, player data, and region files with ease.
Compare NBTExplorer.net to Universal Minecraft Editor or Code Beautify JSON Validator:

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
Compare JSONFormatter.org to Universal Minecraft Editor or Code Beautify JSON Validator:

An up-to-date NBT viewer and editor with lots of new features
Compare NBT Studio to Universal Minecraft Editor or Code Beautify JSON Validator:

Freeformatter is a platform that contains free online tools for developers, including formatters (json, html, xml, sql, etc.), minifiers (css, javascript), compactors, validators, and much more.
Compare FreeFormatter to Universal Minecraft Editor or Code Beautify JSON Validator: