JSON Formatter (www.oh-benri-tools.com)
An online tool for formatting JSON data. Supports drag-and-drop file input and displays results in real time with line numbers and syntax highlighting. All processing is done in the browser.
JSON Formatter FOR WEB (atl2.net)
A browser-based JSON parsing and formatting tool. Visually outputs formatted JSON along with type information and element length metrics. Supports configurable indentation (tabs, 4-space, 2-space).
JSON to CSV (web-toolbox.dev)
Free tool for converting JSON data to CSV format. Just paste array-based JSON to convert it, ideal for migrating data to spreadsheet applications.
JSON to TOML (web-toolbox.dev)
Free tool for converting JSON data to TOML format. Useful for config file format conversion.
JSON to YAML (web-toolbox.dev)
Free tool for converting JSON data to YAML format. Useful for config file format conversion and transforming API responses into YAML.
JSON Tools (www.piliapp.com)
Online JSON utility tools including formatter, validator, and minifier. Format messy JSON for readability, validate syntax, and compress JSON data in the browser.
JWT Decode (toolpods.io)
Decode JWT (JSON Web Token) to inspect the header, payload, and signature contents.
JWT Decoder (web-toolbox.dev)
Free tool for decoding JWT (JSON Web Token) to inspect the header and payload. Decodes only without signature verification, making it easy to check token contents.
Kaki-no-Tane Ratio Simulator
An online tool for simulating the ratio of Kaki-no-Tane (rice crackers) to peanuts. Press buttons to adjust input amounts and check ratios in real time. Includes a feature to download the results as an image.
Kana Flashcards (www.piliapp.com)
Online flashcards for learning Japanese hiragana and katakana. Practice recognizing kana characters with an interactive quiz-style interface to build reading skills.
Kanji Magnifier (www.oh-benri-tools.com)
An online tool for displaying complex kanji characters in a large font. Text is displayed enlarged in real time as you type, with slider-adjustable size. Useful for checking the strokes of difficult kanji.
KPI Tree Builder (toolpods.io)
Visually build KPI trees. Decompose target metrics and organize their relationships in a hierarchical tree structure.
