KoguNavi
Tools
A tiny toolbox for everyday cleanup tasks. Search by job, format, category, or whatever you have in mind.
Current tools are designed to run in your browser. As a general habit, avoid pasting passwords, private keys, or production secrets into any website.
Showing 15 of 15 tools.
Developer tools
6 tools
JSON Formatter
Format, validate, and beautify JSON locally in your browser.
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SQL Formatter
Format SQL queries locally in your browser.
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Cron Expression Explainer
Explain standard 5-field cron expressions locally.
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Regex Tester
Test JavaScript regular expressions locally against sample text.
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UUID Generator
Generate UUID v4 values locally in your browser.
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Hash Generator
Generate SHA hashes for text locally with Web Crypto.
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Conversion tools
5 tools
Base64 Encode / Decode
Encode and decode Base64 text without uploading input.
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URL Encode / Decode
Encode and decode URL components locally.
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Full-width / Half-width Converter
Convert Japanese full-width and half-width text locally.
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Japanese Era Converter
Convert dates between Gregorian years and Japanese eras locally.
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Unix Timestamp Converter
Convert Unix timestamps and date/time values locally.
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Text tools
4 tools
Character / Word Counter
Count characters, words, lines, and UTF-8 bytes for multilingual text.
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Text Diff Checker
Compare two text snippets with a local line-by-line diff.
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Markdown Table Generator
Build Markdown tables from an editable local grid.
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Markdown Live Preview
Write Markdown on one side and preview the rendered page on the other, locally in your browser.
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