A collection of handy tools that run instantly in your browser
Count characters, words, and lines in real-time
Convert text case
Test regular expression patterns
Clean up text by trimming lines and fixing spacing
Compare differences between two texts
Generate sample placeholder text
Generate multiple UUIDs at once
Generate UUID/ULID/KSUID with optional prefixes
Export dummy records as SQL, CSV, or JSON
Convert between Base64, URL, and Hex
Convert between Markdown and HTML and generate a TOC
Bulk replace text with regular expressions
Reverse the text order
Sort lines alphabetically
Remove duplicate lines
Add numbers to each line
Clean extra spaces and blank lines
文字を大きなAAで強調表示
Format, minify, and validate JSON
Base64 encode/decode
URL encode/decode
Convert between HEX, RGB, HSL color formats
Escape HTML special characters
Unescape HTML entities
Minify HTML by removing whitespace
Minify CSS
Format CSS for readability
Minify JSON
Decode JWT tokens
Generate hashes from text
Generate random passwords
Convert length, weight, temperature, and more
Convert between binary, octal, decimal, and hexadecimal
Convert JSON arrays to CSV
Convert CSV to JSON arrays
Convert INI to JSON
Convert JSON to INI
Convert images to Base64
Render Base64 as an image
Convert between Unix time and date/time
Countdown to a specific date and time
Calculate date differences and additions
Create a shareable countdown timer URL
Create a shareable countup timer URL
Optimize work and break cycles with a Pomodoro timer
Minimal Pomodoro timer
Show days and time remaining in this year
Show hours and time remaining today
A collection of digital clocks for OBS
A large web clock with customizable settings
Calculate nPr and nCr
Calculate nCr
Calculate circular permutations (n-1)!
Generate a list of permutations
Calculate Body Mass Index from height and weight
Estimate calories burned from steps
Quickly tally MK8DX 6v6 race scores
Quickly tally MK8DX 3v3v3 race scores
Quickly tally MK8DX 4v4v4 race scores
Quickly tally MK8DX tag match race scores
Create and export a course memo list
Japanese/English item name list
Common in-game chat phrases like GG/GL
A quick list of playable characters and major NPC names
A list of major character names in JP/EN/CN
Compare two YouTube videos side by side
Convert full-width and half-width characters
Convert full-width and half-width kana
Swap uppercase and lowercase letters
Generate QR codes from text or URLs
Convert RGBA to RGB against a background color
Create and share checklists via URL
Remove or convert half/full-width spaces
Remove line breaks or convert them to HTML tags
Display times for multiple time zones simultaneously
Convert between seconds, minutes, hours, days, weeks, months, and years
Calculate business days until month-end, year-end, etc.
Convert between monthly salary, annual salary, and hourly wage
Convert cron expressions to human-readable format
Decode and inspect JWT tokens in detail
Show browser and device info at a glance
Detect and display invisible characters in text
Convert between polite and plain Japanese styles
Normalize text to prevent copy-paste issues
Split bills with weighted shares and rounding options
Convert between Japanese era (Wareki) and Western calendar
Estimate reading/speaking time for your text
Randomly pick one item from a list with roulette animation
Convert between TOML and JSON formats
Calculate network information from CIDR notation
Preview OGP tags as they appear on social media & generate HTML
Calculate aspect ratio from dimensions and resize with fixed ratio
Measure your typing speed and accuracy
Preview and edit SVG path data in real time
Convert Linux file permissions between numeric and symbolic notation
Look up ages, school entry/graduation years by birth year
Calculate contrast ratio and check WCAG compliance
Check password strength in real time
Detect and fix garbled text by trying multiple encodings
Paper size reference (A/B series) with cutting calculator
Find the closest traditional Japanese color name for any color code
Generate .gitignore by selecting languages and frameworks
Convert cURL commands to Python/JavaScript/Go and more
Format and indent SQL queries for readability
Preview Markdown in real-time
Generate favicons from text or emoji
Build robots.txt easily
Generate harmonious palettes from a base color
Compress and resize images in the browser
Search and reference HTTP status codes
Search and copy emojis by category or keyword
Look up addresses from zip codes and vice versa
このサイトではCookieを使用し、アクセス解析および広告配信を行います。続行することで同意したものとみなします。