日常業務のための無料ウェブツール

Count words, characters & reading time

Convert text case formats

Compare two texts and highlight differences

Generate URL slugs from text

Generate UTM tracking links

Count characters for social media

Write markdown with live HTML preview

Convert between common units

Encode & decode Base64 strings

Pick & convert HEX, RGB, HSL colors

Convert Markdown to HTML & vice versa

URL encode & decode

Convert text to Morse code

Convert binary, hex, decimal, octal

タイムゾーン間で時間を変換

ライブレートで通貨を変換

Convert JSON to YAML

Convert YAML to JSON

Convert CSV to SQL INSERTs

Calculate BMI from height & weight

Calculate exact age from date of birth

Calculate percentages & percentage change

Calculate days between dates

Calculate tips & split bills

Calculate loan EMI & interest

オンライン科学計算機

ポモドーロ生産性タイマー

Generate secure random passwords

Generate random numbers & sequences

Generate QR codes for any text or URL

Generate Lorem Ipsum text

Generate random UUIDs

Format & validate JSON

Generate SHA-256, SHA-1, MD5 hashes

HTML entity encode/decode

Generate CSS gradients

Test regular expressions live

Decode JWT tokens

Convert CSV data to JSON

Format and beautify SQL queries

Minify and format CSS code

Generate harmonious color schemes

Format & validate XML

Generate CSS box shadows

Generate cron expressions

Lookup IP geolocation & network info

Generate TypeScript interfaces from JSON

Check WCAG color contrast ratio

Create CSS gradient text

Generate Apache .htaccess files

Compare and diff JSON files

Convert epoch timestamps to dates

Convert XML to JSON

Generate RSA public & private keys

Visually generate CSS grid code

Generate HTML meta tags for SEO

Live code editor with instant preview

Generate and check Bcrypt hashes

Compress images client-side

Resize images in browser

画像からファビコンを生成

Download YouTube video thumbnails

Convert SVG to PNG

Merge PDF files online