シンプルなオンラインツール

WebP Converter

Convert images to WebP format to reduce file size

HEIC/HEIF Converter

Convert iPhone photos (HEIC) to JPEG/PNG

SVG Optimizer

Compress and optimize SVG files

ICO Converter

Convert images to favicon.ico format

Markdown Converter

Convert Markdown to HTML/PDF

CSV⇔Excel Converter

Convert between CSV and Excel files

eBook Converter

Convert between EPUB, PDF, and MOBI

Audio Format Converter

Convert between MP3, WAV, AAC, OGG

Video Resolution Converter

Convert to 4K, 1080p, 720p, etc.

Subtitle Converter

Convert between SRT, VTT, ASS

Data Format Converter

Convert between JSON, CSV, TSV, and XML

SQL Dialect Converter

Convert between MySQL, PostgreSQL, SQLite

Programming Language Converter

Convert TypeScript→JavaScript, SCSS→CSS

Regex Converter

Convert regex syntax between languages

Currency Converter

Convert currencies with real-time rates

Timezone Converter

Convert time across timezones

Coordinate Converter

Convert between lat/lon, UTM, and planar

Barcode/QR Converter

Convert between barcode formats

Encryption Format Converter

Convert encryption algorithms and key formats

Certificate Converter

Convert between PEM, DER, PFX, P12

App Icon Generator

Generate icons for iOS/Android apps

Screenshot Converter

Add device frames and resize

Font Converter

Convert TTF, OTF, WOFF, WOFF2

Vector Image Converter

Convert between AI, SVG, EPS

DPI Converter

Change image DPI (resolution)

Visualization Builder

Create beautiful charts and graphs from your data

UUID Generator

Generate UUIDs in various formats including v1, v4, v5

URL Encoder

Encode and decode URLs, Base64, and more

Security Scanner

Check website security headers and configurations

Machine Learning Demo

Basic machine learning demonstrations running in your browser

Code Formatter

Format JavaScript, JSON, CSS, HTML and more

Case Converter

Convert text to various case formats

Blockchain Explorer

Search and track Bitcoin blockchain transactions

Text Translator

High-precision multilingual translation tool using Google Gemini 1.5 Flash AI (60+ languages supported)

Roulette Spinner

Random item selection roulette tool

Bingo Game

Online bingo game tool

SVG Path Editor

Visual SVG path editing tool

Commit Message Generator

Auto-generate Git commit messages

Calendar Generator

Generate customizable calendars

File Compressor

Compress files to reduce size

OCR Tool

Extract text from images

Whiteboard

Digital whiteboard for free drawing

Mind Map

Visually organize ideas

Kanban Board

Task management board

Voice Recorder

Record and save audio

ASCII Art Generator

Generate ASCII art from text

Batch Rename

Rename multiple files at once

Image Comparison

Compare two images side by side

Clipboard Manager

Manage clipboard history

Screen Recorder

Record and save screen

Font Viewer Tool

Display and preview fonts installed on your PC.

AI Image Upscaler

Convert images to high resolution using AI technology. Perfect for restoring old photos and improving image quality

Data URL Generator & Parser

Convert files to data:URLs or parse data:URLs to extract file information and restore files

HTML/CSS Formatter & Minifier

Format (beautify) and minify HTML or CSS code to improve readability or reduce file size

Placeholder Image Generator

Generate dummy images for development and design with custom size, color, and patterns

Character Encoding Repair

Detect and repair character encoding issues and corrupted text

Basic Image Filters

Apply basic filter effects to images

YAML/TOML Converter

Convert between YAML, TOML, and JSON formats

Cron Expression Generator

Generate cron expressions for scheduled tasks with an easy interface

Browser Compatibility Checker

Check browser support status for HTML, CSS, and JavaScript features.

Favicon Converter

Convert images to favicon and generate files for various sizes and platforms

Icon Generator

Create and generate custom icons easily

AI Text Proofreader & Summarizer

AI-powered text proofreading, summarization, and improvement suggestions

PDF Merger & Splitter

Merge multiple PDF files or split a single PDF into multiple files

Web Page Screenshot

Take screenshots of web pages

Meme Generator

Create funny meme images by adding custom text to popular meme templates

EXIF Data Remover

Remove EXIF metadata including location and shooting information from images for privacy protection

Advanced Image Filters & Effects

Advanced image filtering using WASM + Canvas (Gaussian blur, edge detection, HDR processing, etc.)

Image Analysis & Feature Extraction

Image analysis using WASM OpenCV + TensorFlow.js (histogram, color analysis, pattern recognition)

Video to GIF Converter

Convert video files to animated GIFs. Fast processing in your browser.

Video to Audio Extractor (MP3 Converter)

Extract audio tracks from video files and save as MP3 files

Pomodoro Timer

Practice the Pomodoro Technique with alternating work and break sessions

Loan Calculator

Calculate monthly payments and total cost for mortgages, auto loans, and personal loans

Furusato Tax Calculator

Calculate optimal donation amounts and tax deduction limits for Furusato Tax based on income and family structure

AI Image Generator

Generate images from text prompts using AI

AI Blog Idea Generator

Generate attractive blog post titles and outlines from a single keyword

YouTube Downloader

Download YouTube videos, get thumbnails, and convert formats.

Unit Converter

Convert units of length, weight, temperature, area, etc.

Background Remover

Automatically remove backgrounds from images

Image Format Converter

Convert image formats

QR Code Generator

Convert text, URLs, WiFi settings into QR codes

JSON Formatter & Validator

Format, minify, validate, and display statistics for JSON.

Base64 Converter

Convert text or files to Base64 format and decode

Color Picker & Palette

Color selection, conversion, palette generation, and color harmony analysis tool

URL Shortener

Shorten long URLs for easier management and sharing

Password Generator

Generate secure and strong passwords

Hash Calculator

Calculate MD5, SHA-1, SHA-256, and other hash values from text or files

Lorem Ipsum Generator

Generate dummy text (Lorem Ipsum) in multiple languages for design mockups with customizable paragraphs and word count

Calculator

Basic, scientific, and programmer calculations

API Tester

Send HTTP requests and validate responses.

Regex Tester

Test regular expressions and view match results

Markdown Preview

Preview Markdown text in real-time

CSS Formatter & Minifier

Format and minify CSS, syntax checking

HTML Encoder/Decoder

Encode and decode HTML entities to display special characters safely

XML Formatter & Validator

Format XML and syntax validation

SQL Formatter & Minifier

Format and minify SQL queries, syntax checking

CSV Data Processor

CSV file conversion, filtering, statistics

Text Statistics & Analyzer

Get detailed statistics and readability analysis of your text.

Text Diff Comparison

Compare two texts and visualize differences

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