There are several json editing options, personally I use notepad++ but you could try visual studio code which is a free download. Answer from EvilNuff on reddit.com
GitHub
github.com › josdejong › jsoneditor
GitHub - josdejong/jsoneditor: A web-based tool to view, edit, format, and validate JSON · GitHub
It can be loaded as CommonJS module, AMD module, or as a regular javascript file. The library was originally developed as core component of the popular web application https://jsoneditoronline.org and has been open sourced since then.
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GitHub
github.com › json-editor › json-editor
GitHub - json-editor/json-editor: JSON Schema Based Editor · GitHub
The following are not required, but can improve the style and usability of JSON Editor when present. A compatible JS template engine (Mustache, Underscore, Hogan, Handlebars, Lodash, Swig, Markup, or EJS) A compatible CSS framework for styling (Spectre, Tailwind, Bootstrap4) A compatible icon library (Spectre, jQueryUI, Font Awesome 3/4/5) SCEditor for WYSIWYG editing of HTML or BBCode content · SimpleMDE for editing of Markdown content · Ace Editor for editing code · Jodit Open Source WYSIWYG editor ·
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Languages JavaScript 61.9% | HTML 36.2% | CSS 1.9%
Videos
Tangramjs
json-editor.tangramjs.com
JSON Editor - About
JSON Editor is an open source project, which is a schema-aware editor for JSON document including JSON schema. It provides a tree view to present the structure of JSON document, user could manipulate the JSON from context menu.
Intrepiduniverse
intrepiduniverse.com › projects › jsonEditor.html
Free JSON Editor for Windows, MacOS and Linux
JSONEdit is a secure, free, open source, cross platform JSON Editor / Viewer written in Python. Multi-line text is automatically handled with embedded newlines. Edit and view JSON locally on your device. Supports Windows, MacOS, Linux and any platform with support for running python in a windowed ...
JSON Editor Online
jsoneditoronline.org
JSON Editor Online: edit JSON, format JSON, query JSON
JSON Editor Online is the original and most copied JSON Editor on the web. Use it to view, edit, format, repair, compare, query, transform, validate, and share your JSON data.
Reddit
reddit.com › r/battletechgame › a tool better than notepad++ for reading/writing jsons?
r/Battletechgame on Reddit: A tool better than Notepad++ for reading/writing jsons?
February 2, 2020 -
Is there a tool that can extract the json values to be altered in a manner less manual and more clean than using a straight text editor?
Quora
quora.com › What-are-some-good-open-source-JSON-object-viewers-editors
What are some good open source JSON object viewers/editors? - Quora
Answer: This one does a pretty neat job: view, edit and format JSON online
Jsonhero
jsonhero.io
JSON Hero - a beautiful JSON viewer for the web
Use jsonhero.io or fork it on GitHub and run it yourself.
Editor.js
editorjs.io
Editor.js
A Free, Block-Style Editor with Universal JSON Output · Editor.js empowers developers and products staying focused on the end-user experience Get Started · Free and open-source · Evolving with global contributions. Join and be part of the innovation. Clean UI/UX ·
AlternativeTo
alternativeto.net › software › json-editor-online
JSON Editor Online Alternatives and Similar Sites & Apps | AlternativeTo
Boop is the most popular Mac alternative to JSON Editor Online. Boop is Free and Open SourceJSON Editor Online is Free and Proprietary
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Personally I use this tool to convert my JSON to CSV. Then, CSV can be used as normal with LibreOffice Calc, Google Sheets, or Microsoft Excel.
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The mentioned Visual Studio Code or similar multi-functional editors or IDEs may not handle or crash even while processing JSON files of sizes bigger enough, like more than 500 MiB.
Sublime Text will handle quite big files in JSON at least for viewing.
But still, both are not a solution to the question, I believe. Those are full-blown multi-functional editors and sure not specifically oriented on data editing as JSON, YAML, CSV, or alike, predominantly, but just feature an additional support for relatively small files.
Therefore, have you considered standalone software, like the following?
Graphical User Interface (GUI)
Janice
A desktop app for viewing large JSON files...
What is the largest JSON file that I can load?
The largest JSON file you can load on your computer depends mainly on how much RAM you have and on the particular JSON file. The main driver for memory consumption is the number of elements in a JSON document.
For comparison we did a load test on one of our developer notebooks. It has 8 GB RAM and runs Ubuntu 22.04 LTS. We were able to load a JSON files successfully with up to 45 million elements. The size of our test file was about 2.5 GB.
Source
Text User Interface (TUI)
FX
Fx is a CLI for JSON: it shows JSON interactively in your terminal, and lets you transform JSON with JavaScript. Fx is written in Go and uses goja as its embedded JavaScript engine.
Source
SourceForge
sourceforge.net › home › open source software › formats and protocols › data formats › json software
Best Open Source Windows JSON Software 2026
The JsonCpp port in vcpkg is kept ... and runs from a multi-node installation on AWS down to the Android edition. It's free and open source (released under the Eclipse Public License....
Tomeko
tomeko.net › software › JSONedit
JSONedit - JSON editor
Tools menu: experimental, very relaxed pseudo-JSON parser, alternative method of prototyping structures for further pasting into main editor · FIXED: no brace matching for JSON text view (incorrectly selected Lua highlighter since 0.9.16) FIXED: edit panel was not updated (showing still values from document) when document was reloaded in tree view and no node was selected; root node is now selected as default · FIXED: default directory for file open dialog was not updated if file was loaded using drag-and-drop
JSON Crack
jsoncrack.com
JSON Crack | Online JSON Viewer - Transform your data into interactive graphs
Once you're satisfied, you can export an image of your graph as PNG, JPEG, or SVG and share with others. Format JSON and transform into a readable graph in seconds. JSON Crack is an open-source online tool that helps you visualize and understand ...
Pmk65
pmk65.github.io › jedemov2 › dist › demo.html
Json-Editor Interactive Playground
The JSON-Editor Interactive Playground is a page where you can test various setups for the OpenSource JSON Schema parser JSON-Editor
Ophir
json.ophir.dev
JSONJoy Builder - Visual JSON Schema Editor
Visual JSON Schema editor for creating and manipulating JSON Schema definitions. Open source at https://github.com/lovasoa/jsonjoy-builder
Json-editor
json-editor.github.io › json-editor
JSON Editor Interactive Example
Below is the editor generated from the JSON Schema.
JSON Crack
jsoncrack.com › editor
Editor | JSON Crack
JSON Crack Editor is a tool for visualizing into graphs, analyzing, editing, formatting, querying, transforming and validating JSON, CSV, YAML, XML, and more.
LinuxLinks
linuxlinks.com › home › 17 best free and open source json tools
17 Best Free and Open Source JSON Tools - LinuxLinks
May 16, 2025 - JSON has attracted the attention of tool builders, who have created a variety of tools for reformatting, validating, and parsing JSON. Here’s our verdict captured in a legendary LinuxLinks-style ratings chart. They are all free and open source goodness.
Awesomeopensource
awesomeopensource.com › projects › json-editor
The Top 23 Json Editor Open Source Projects
A truly rich editor for Directus. total releases 12latest release November 19, 2023most recent commit 2 years ago ... dependent packages 23total releases 73latest release November 04, 2023most recent commit 2 years ago ... 一个使用 antd 搭建的可使用 schema 约束的 json-editor。支持良好，简单可靠，效率更高！