開発者ツール
Format JSON, minify code, encode Base64 and URLs, generate hashes, UUIDs, and convert color codes.
JSON Formatter & Validator
Format, validate, beautify, and minify JSON data structures with syntax error detection.
HTML/CSS/JS Minifier
Minify HTML markup, CSS stylesheets, and JavaScript code to compress web file sizes.
Base64 Encode / Decode
Encode plain text or binary string data into Base64 format or decode Base64 back to plain text.
URL Encode / Decode
Encode special characters into URL percent-encoding format or decode encoded URLs.
MD5 / SHA-1 Hash Generator
Generate cryptographic MD5, SHA-1, SHA-256, and SHA-512 hashes instantly.
UUID / GUID Generator
Generate single or bulk RFC4122 compliant UUID v4 / GUID strings with custom options.
Color Code Converter
Convert color values bi-directionally between HEX, RGB, HSL, HSV, CMYK, and Tailwind CSS classes.
Explore Other Categories
Productivity & Utility Tools
Track time with stopwatch timers, focus with Pomodoro cycles, write auto-saved notes, calculate exact ages, convert world clocks, and manage task lists.
Calculators
Everyday financial calculators, date/time tools, unit converters, and token cost estimators.
AI Content Tools
Generate high-CTR YouTube titles, trending social hashtags, structured blog outlines, summarized articles, grammar audits, and product descriptions.
Document Generators
Generate professional invoices, CV/resumes, cover letters, and legal policies instantly in browser with print and PDF exports.