JSON Formatter
Format, minify, validate, and copy JSON without leaving the browser.
22 focused utilities
Developer Tools
Developer tools on Tenshio Tools focus on clean, quick workflows such as UUID generation, timestamp conversion, JSON and CSV conversion, JWT inspection, regex testing, and lightweight previews.
UUID Generator
Generate one or many random UUID v4 values directly in the browser.
Timestamp Converter
Convert Unix timestamps to readable dates and turn dates back into timestamps.
JSON Minifier
Minify JSON and validate syntax before copying compact output.
CSV to JSON Converter
Turn CSV rows into structured JSON arrays with header-based keys.
JSON to CSV Converter
Convert JSON arrays into CSV rows with generated headers and export-ready output.
JWT Decoder
Decode JWT headers and payloads to inspect claims without verifying signatures.
Regex Tester
Test regular expressions against sample text with flags, match counts, and group details.
URL Parser
Break a URL into protocol, host, path, query, hash, and search parameters.
HTML Preview
Preview HTML and inline CSS in a sandboxed browser frame.
CSS Minifier
Minify CSS by removing comments and extra whitespace for compact output.
XML Formatter
Format and pretty-print XML with indentation and parser feedback in the browser.
YAML to JSON
Convert YAML into formatted JSON directly in the browser.
JSON to YAML
Convert JSON into YAML for config files and human-readable structured output.
SHA256 Generator
Generate SHA-256 hashes from text or uploaded files directly in the browser.
MD5 Generator
Generate MD5 hashes for quick checksums and legacy compatibility workflows.
Decimal to Binary
Convert decimal integers into binary with hex and octal helpers included.
Binary to Decimal
Convert binary strings into decimal values with hex and octal helpers.
Meta Tag Generator
Generate HTML meta tags for titles, descriptions, canonical URLs, and robots directives.
Open Graph Generator
Generate Open Graph and social sharing tags for cleaner link previews.
Robots.txt Generator
Generate robots.txt rules for crawlers, sitemap references, and indexing control.
Sitemap Generator
Generate XML sitemaps from URLs or relative paths directly in the browser.