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
Image Mosaic & Blur Tool
Protect faces and personal info with mosaic & blur
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
Video to GIF Converter
Convert MP4 & WebM to GIF animation in browser
Image to PDF Converter
Safely convert and merge multiple images into one PDF
YouTube Thumbnail Maker
Create thumbnails with bordered text easily
Text Proofreader
Check text for typos and inconsistencies
Mojibake Fixer
Instantly decode and fix corrupted character encoding
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
Old⇔New Kanji Converter
Convert between old and new forms of Japanese kanji
Speech to Text (Offline)
Accurate offline speech recognition powered by local AI
Vertical Text Editor
Write vertically and export to Manuscript PDF
Sleep Cycle Calculator
Calculate optimal sleep and wake times
Bill Split Calculator
Calculate exact splits and share as images
Take-Home Pay Simulator
Estimate taxes and social insurance deductions
Age & School Year Calculator
Calculate graduation years automatically for resumes
PDF Password Tool
Add / Remove client-side PDF passwords safely
BPM Tap Tempo Tool
Measure BPM and calculate delay times
Random Team Generator
Split members into random teams
Random Roulette Wheel
Customizable spinning wheel for raffles
Audio Waveform Generator
Generate waveform images from audio
Concert Fan Builder
Design print-ready concert fan text
Online Bingo Machine
Free browser-based Bingo machine
Business Day Calculator
Calculate required days excluding weekends and holidays
Invoice Generator
Create professional PDFs on the browser
PDF Merge & Split Tool
Safely process PDFs without server upload
QR Code Generator
Generate customized QR codes quickly
Resume Builder
Build your Japanese resume and output as PDF
Tournament Bracket Generator
Click to create and share custom brackets
Amidakuji (Ladder Lottery)
Create animated ladder lotteries and share via URL
Ambient Sound & Timer
Mix ambient sounds to maximize focus
Seating Chart Maker
Create seating charts with drag & drop
Browser Screen Recorder
Record your screen directly from the browser without installing apps
Online Metronome
High-precision metronome powered by Web Audio API
QR & Barcode Reader
Scan QR codes and barcodes from camera or images
Subtitle Time Shifter
Shift and convert SRT/VTT subtitle file timecodes
Meeting Time Zone Finder
Find overlapping work hours across multiple time zones