beta version

Free, browser-based web tools — no sign-up required

🇯🇵 JA 🇺🇸 EN

FFiles & Media

Fav

Favicon Generator

Generate favicon.svg, apple-touch-icon.png, and favicon.ico from text or images (PNG/SVG). Dark mode SVG & PWA manifest included
Img

Batch Image Converter & WebP Tool

Batch resize and convert images to WebP. Dramatically reduce file size and improve Core Web Vitals
S

SVG Optimizer

Strip metadata, comments, and editor attributes from SVG files to reduce file size. Side-by-side preview included
Md

Markdown Previewer

Preview Markdown files in your browser. GFM tables, code highlighting, and one-click HTML export

>_Development & Debugging

{ }

JSON Formatter & Validator

Pretty-print compressed JSON and validate syntax in real time. Error line highlighting for quick debugging
.*

Regex Tester

Test regular expressions with real-time match highlighting, capture groups, and replacement preview

#CSS & Design

P

Color Palette Extractor

Automatically extract dominant colors from any image. Copy in HEX, RGB, or HSL format. Perfect for brand color design

More tools are available in Japanese on the main site — including JSON formatter, regex tester, CSS grid generator, QR code generator, and 20+ others. English versions coming soon.