Free and open first
Best JSON Tools in 2026
JSON tools can help you format, inspect, query, compare, or validate structured data. Compared on batch processing, jq and JSONPath querying, JSON diff and compare, and schema validation, the entries offer distinct capabilities to weigh. Check available platforms, free-plan status, and paid-from pricing as well, since access and cost may matter as much as a particular operation. jq is suited to querying workflows, while Dadroit JSON Viewer and BracketView are other names to consider. Think about the JSON tasks you handle most often, then compare the listed features and platform details against those needs.
- 29 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
jaq
Free plan Open source APILinuxMac+3jaq brings jq-style filtering to multiple data formats and also offers a Rust library. Its lack of resource-use limits is worth considering when processing untrusted or costly workloads.
- 2
Dadroit JSON Viewer
Free plan LinuxMacWeb+1Dadroit JSON Viewer combines tree-based browsing, search, file union, and export for JSON data.
- 3
gojq
Free plan LinuxMacSelf-hosted+1gojq brings jq-style querying to Go with CLI and library use, plus YAML support. Check its documented compatibility and execution limits when replacing jq or embedding it in an application.
- 4
BracketView
Free plan LinuxWebWindowsBracketView brings JSON inspection, querying, validation, and comparison together with both browser and desktop options.
- 5
Ajv
Free plan Self-hostedWebChoose Ajv if you need a free JavaScript library for JSON Schema or JTD validation, with compiled functions and TypeScript support.
- 6
European Commission JSON Validator
Free plan APISelf-hostedWebEuropean Commission JSON Validator offers configurable schema validation through several interfaces, with standalone use that does not record inputs or reports.
- 7
- 8
jq
Free plan LinuxMacSelf-hosted+2jq provides a flexible filter model for selecting and transforming JSON, with options for output formatting and large inputs.
- 9
camfx
Free plan LinuxChoose camfx if you use Linux and want effects routed through a virtual camera, with both command-line and GTK controls.
- 10
JSONBuddy
Free plan APIExtensionWindowsJSONBuddy combines visual editing, schema tools, conversions, and automation across its Windows, API, and extension offerings.
- 11
jless
Free plan LinuxMacjless combines terminal navigation, search, and clipboard or print commands for inspecting structured data. Its platform coverage and lack of a configuration file are worth noting before choosing it.
- 12
jidoujisho
Free plan Androidjidoujisho brings media playback, reading and flashcard creation into one Android language-learning toolkit.
- 13
JSON Crack
Free plan ExtensionWebJSON Crack brings data visualization, conversion, validation, and query tools together in a free online viewer.
- 14
JSON Editor
Free plan Self-hostedWebJSON Editor provides schema-based form generation, validation, and a range of themes as a free MIT-licensed library.
- 15
JSONLint
Free plan ExtensionMacWebJSONLint covers common JSON checking and transformation tasks across browser, extension, and Mac app formats.
- 16
JSONZen
Free plan APILinuxMac+2JSONZen covers common JSON tasks in a browser and includes schema validation, query tools, and code generation.
- 17
JSON Compare
Free plan WebJSON Compare offers a direct way to compare two JSON inputs, alongside a broader set of JSON utilities. Review the stated privacy and cookie practices if those details matter to your workflow.
- 18
jsonfmt.dev
Free plan APIWebjsonfmt.dev combines browser tools with an API for common JSON tasks, plus converters and related utilities.
- 19
JSON Forms
Free plan Self-hostedWebJSON Forms gives developers schema-driven form building blocks and several framework integrations, with room to customize rendering and validation.
- 20
JSONEditor.io
Free plan WebChoose JSONEditor.io for a no-signup web editor with multiple JSON views, schema validation, conversion, and offline use.
- 21
JSON Formatter
Free plan WebJSON Formatter combines everyday formatting and validation with repair, JSONPath filtering, and command-body extraction.
- 22
JSON Hero
Free plan WebChoose JSON Hero for browser-based JSON editing, validation, navigation, and comparison.
- 23
JSON OS
Free plan WebJSON OS brings a broad set of JSON editing and Markdown authoring tools into a browser workbench.
- 24
JSON Reader
Free plan WebChoose JSON Reader if you want a free browser toolkit that combines common JSON editing, inspection, conversion, comparison, and generation tasks.
- 25
JSON Viewer
Free plan MacJSON Viewer focuses on straightforward local JSON inspection with validation and formatting controls.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
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