Cron Generator
Generate Cron expressions & check schedules
JSON to TS Interface
Generate TS types from JSON
HTTP Header Checker
Check response headers & security diagnostics
Markdown ⇔ HTML Converter
Convert Markdown to HTML with real-time preview
JSON Formatter & Validator
Format and validate JSON (Tree View & YAML supported)
File Size Calculator
Calculate sizes based on resolution and capacity
Password Strength Checker
Real-time security diagnosis
Password Generator
Create secure random passwords
ZIP Password Tool
Create or unlock password-protected ZIP files
Contrast Checker (WCAG)
Check color contrast against WCAG & auto-suggest passing colors
Test Dummy Data Generator
Generate realistic Japanese test data in CSV/JSON/SQL
SQL Formatter
Format and highlight SQL queries online
JWT Decoder
Decode JWT tokens locally and safely in your browser
chmod Calculator
Intuitively calculate and convert Linux chmod permissions
HTML to JSX Converter
Convert HTML to React/Next.js JSX automatically
Bcrypt Hash Generator & Checker
Securely hash and verify passwords with Bcrypt locally
Unix Timestamp Converter
Convert between Epoch seconds and readable dates
URL Encoder / Decoder
Encode and decode URL percent-encoding
Number Base Converter
Convert between binary, octal, decimal, and hex
Hash Generator
Generate SHA hashes from text or files instantly
YAML ↔ JSON Converter
Convert between YAML and JSON with real-time validation
JSON ↔ CSV Converter
Convert between JSON and CSV instantly
.env Validator
Validate .env syntax, detect duplicates, view variables
QR Code Safety Checker
Analyze QR code URLs for phishing and suspicious patterns
Git Commit Formatter
Generate Conventional Commits messages with emoji support
Dummy Contact Generator
Generate fake phone numbers, addresses, and emails for testing
JSONPath Tester
Evaluate JSONPath expressions in real-time with match highlighting
Regex Visualizer
Visualize regex patterns as railroad diagrams
Bulk File Renamer
Rename files in bulk with regex, sequence & replace
UUID/GUID Generator
Instantly generate bulk UUIDs (v4/v7) locally
Text to Flowchart
Generate flowcharts automatically from text
Base64 Encoder
Convert text and images to/from Base64 format
Basic Auth Generator
Securely generate .htpasswd and .htaccess in the browser
Environment Checker
Check OS, browser, IP, headers, and screen resolution
URL Parser & Parameter Editor
Parse URLs, edit query parameters, generate UTMs, and clean tracking tags
Flexbox/Grid Layout Generator
Generate layout code with visual GUI
Box-Shadow Generator
Intuitively create beautiful multi-layered shadows
Modern UI Generator
Output beautiful UI code (Glassmorphism supported)
CSS Animation Generator
GUI output for @keyframes animations
SVG Background Generator
Create lightweight SVG background patterns
CSS Triangle Generator
Generate CSS triangles using border trick, copy code instantly
CSS Border Radius Generator
Adjust 8 border-radius values visually and copy CSS code
Typography Preview
Preview font-size, line-height & letter-spacing in real-time
Web Font Previewer
Real-time web font comparison & CSS generation
SVG Icon Search
Search Lucide & Heroicons icons and copy SVG code
Image Rotate & Flip
Rotate 90°/180° and flip images with one click
Color Blind Simulator
Simulate how images and color palettes appear to people with color vision deficiency
Background Remover
AI-powered background removal in your browser
Image Mosaic & Blur Tool
Protect faces and personal info with mosaic & blur
Image Crop
Crop images with social media preset ratios
Social Media Image Resizer
Resize images for social networks and stores
Social Story Cropper
Crop to 9:16 for IG / TikTok format
Instagram Grid Splitter
Auto cut an image for grid layout posting
Photo EXIF Viewer & Remover
View and safely remove location and camera metadata
Image OCR (Text Recognition)
Extract text from photos and screenshots
Image to ASCII Art
Convert images into ASCII text art
Image Text Overlay
Add and style text on images, then save
Pixel Art Editor
Draw pixel art in browser and save as PNG
Image Brightness & Contrast
Adjust brightness, contrast, saturation, and temperature in real time
Image Collage Maker
Combine multiple images into one with grid layouts
Aspect Ratio Calculator
Automatically calculate aspect ratio from image dimensions
OG Image Generator
Create OG images for social sharing for free in your browser
Responsive Image Generator
Generate multi-size images and srcset code automatically
Video to GIF Converter
Convert MP4 & WebM to GIF animation in browser
Browser Screen Recorder
Record your screen directly from the browser without installing apps
Video Frame Extractor
Extract image frames from video files
Subtitle Time Shifter
Shift and convert SRT/VTT subtitle file timecodes
Audio Pitch & Speed Changer
Change audio pitch and speed independently
Audio Trimmer
Trim audio visually with waveform display
Audio Waveform Generator
Generate waveform images from audio
Frequency Tone Generator
Play custom audio frequencies from 20Hz to 20kHz
Online Metronome
High-precision metronome powered by Web Audio API
Online Tuner
Real-time pitch detection for guitar, bass, and instruments
BPM Tap Tempo Tool
Measure BPM and calculate delay times
Speech to Text (Offline)
Accurate offline speech recognition powered by local AI
SERP/OGP Preview
Preview search results and OGP cards on social media
HTTP Status / Redirect Checker
Instantly check URL redirection paths and status codes
Robots.txt Generator
Easily configure Googlebot and block AI crawlers
Keyword Combiner
Batch generate keywords for SEO and PPC campaigns
Meta Tag Generator
Generate necessary HTML header meta tags for SEO
hreflang Generator
Auto-generate hreflang tags for multilingual SEO
JSON-LD Generator
Auto-generate SEO structured data
Check Global IP Address
Instantly find out your current public IP address
Email Header Analyzer
Trace routing paths and authentication results
DNS Record Checker
Check A, MX, TXT, CNAME records instantly
SSL Certificate Checker
Check SSL expiry date and specific certification details
MAC Address Vendor Lookup
Identify device vendor from MAC address OUI
SPF/DKIM/DMARC Checker
Verify email authentication following Gmail guidelines
Subnet & CIDR Calculator
Calculate subnet masks and host ranges instantly
Whois Lookup
Search and check domain registration and nameserver info
Text Proofreader
Check text for typos and inconsistencies
Mojibake Fixer
Instantly decode and fix corrupted character encoding
Text Diff Checker
Compare and find differences between two texts
Regex Tester
Test and replace Regular Expressions in real-time
CSV BOM Fixer
Add BOM to CSV files for proper Excel display
Japanese Text Normalizer
Fix half-width/full-width inconsistency in Japanese text
Reading Time Estimator
Measure estimated time and character count to finish reading
Text Character Counter
Count characters and words in real time
Text Reader Tool
Read text out loud with browser speech synthesis
Unicode Normalizer
Standardize Unicode variations (NFC/NFD/etc)
Writing Style Checker
Check and unify writing style and terminology
Dummy Text Generator
Generate Lorem Ipsum or Japanese dummy text by paragraphs or characters
Old⇔New Kanji Converter
Convert between old and new forms of Japanese kanji
Vertical Text Editor
Write vertically and export to Manuscript PDF
Text Replacer
Batch text replacement with regex support
Fancy Text Generator
Convert text to fancy Unicode fonts for social media
Text to Handwriting Converter
Convert typed text into handwriting-style images
CSV to Markdown Table Converter
Instantly convert CSV and Excel data to Markdown tables
Take-Home Pay Simulator
Estimate taxes and social insurance deductions for Japan
Salary Converter
Convert between hourly, daily, monthly, and annual salary
Minimum Wage Checker
Check minimum wage for all 47 Japanese prefectures
Loan Repayment Calculator
Simulate monthly payments for home, auto, and education loans
Compound Interest Calculator
Visualize compound interest and investment growth instantly
Percentage Calculator
Calculate percentages, increases, and decreases instantly
Points Calculator
Compare reward points across multiple credit cards
Bill Split Calculator
Calculate exact splits and share as images
Electricity Cost Calculator
Calculate monthly electricity costs per appliance
Japanese Gift Money Calculator
Calculate appropriate gift money amounts for Japanese ceremonies
Date Difference Calculator
Calculate date differences and add/subtract days
Countdown Timer
Real-time countdown to any target date and time
Business Day Calculator
Calculate required days excluding weekends and holidays
Japanese Era Year Converter
Convert between Japanese era years and Gregorian calendar
Holiday Calendar
View Japanese national holidays with auto-calculated substitute holidays
Rokuyou Calendar
Check Rokuyou (Japanese lucky/unlucky days) for any date
Age & School Year Calculator
Calculate graduation years automatically for resumes
Meeting Time Zone Finder
Find overlapping work hours across multiple time zones
Ambient Sound & Timer
Mix ambient sounds to maximize focus
PDF Password Tool
Add / Remove client-side PDF passwords safely
PDF Merge & Split Tool
Safely process PDFs without server upload
Reverse Tax Calculator
Reverse calculate consumption and withholding tax from net amount
Image to PDF Converter
Safely convert and merge multiple images into one PDF
Invoice Generator
Create professional PDFs on the browser
Email Signature Generator
Create and copy professional HTML email signatures
Resume Builder
Build your Japanese resume and output as PDF
Business Card Generator
Create vertical Japanese business cards with furigana
Stamp/Seal Image Generator
Generate Japanese-style stamp images instantly from your name
Digital Signature Maker
Create transparent signature images via handwriting or text
QR Code Generator
Generate customized QR codes quickly
QR & Barcode Reader
Scan QR codes and barcodes from camera or images
Barcode Generator
Generate bulk 1D barcodes like EAN/Code39 instantly
Random Roulette Wheel
Customizable spinning wheel for raffles
Amidakuji (Ladder Lottery)
Create animated ladder lotteries and share via URL
Online Bingo Machine
Free browser-based Bingo machine
Random Team Generator
Split members into random teams
Tournament Bracket Generator
Click to create and share custom brackets
Seating Chart Maker
Create seating charts with drag & drop
Sudoku
Auto-generate Sudoku puzzles with solver and hints
Typing Practice
Practice typing and measure WPM and accuracy
Vocabulary Test & Flashcards
Level-based multiple-choice vocabulary test and flashcards
BMI Calculator
Instantly calculate BMI, obesity level, and ideal weight
Calorie Calculator
Calculate BMR, TDEE, and goal calories instantly
Sleep Cycle Calculator
Calculate optimal sleep and wake times
Unit Converter
Convert 150+ units across length, weight, temperature, area, volume
Cooking Unit Converter
Convert cups to grams with ingredient-specific density
Postal Code Lookup
Convert postal codes to addresses instantly, no API required
Numerology Calculator
Calculate Life Path & Destiny Numbers from your name & birthday
Japanese Name Fortune
Calculate five-kaku values from Japanese kanji name strokes
Concert Fan Builder
Design print-ready concert fan text
Breathing Exercise Timer
Practice 4-7-8 and box breathing with guided animation
Send Feedback
Please let us know your thoughts to help us improve the tool.
Feedback is temporarily suspended
The server is busy or spam protection is active. Please try again later.