e-Toolbox日本語
Period CalculatorBase ConverterQR Code GeneratorUUID GeneratorPassword GeneratorHash GeneratorImage ResizerImage GrayscaleImage BinarizerExif ViewerJSON FormatterColor PickerImage Color PickerURL EncoderBase64 ConverterUnix TimestampFavicon Generator3D Model ViewerVRM ViewerFunction PlotterStatistics CalculatorLinear RegressionDistribution SimulatorCharacter CounterRegex TesterBMI CalculatorBSA CalculatorBMR Calculator

e-Toolbox

A collection of useful web tools to streamline your daily tasks (26+ tools!)

Free browser-based utility tools. All processing is done client-side, ensuring your data remains secure and private.

Conversion & Calculation

Number conversion, unit conversion, and date calculation tools

Period Calculator

Calculate the period between two dates (days, weeks, months, years)

Base Converter

Convert between binary, octal, decimal, and hexadecimal numbers

ID & Code Generation

QR code, UUID, password, and other generation tools

QR Code Generator

Generate QR codes from text or URLs

UUID Generator

Generate unique UUID v4 identifiers

Password Generator

Generate strong and secure passwords automatically

Hash Generator

Calculate MD5, SHA-256, and SHA-512 hashes

Image

Image resizing and processing tools

Image Resizer

Easily resize your images

Image Grayscale

Convert images to grayscale

Image Binarizer

Convert images to black and white binary images

EXIF Viewer

View EXIF metadata from images

Creative

Development tools for programming and design

JSON Formatter

Format JSON data and check for syntax errors

Color Picker

Convert between RGB, HEX, and HSL color codes

Image Color Picker

Extract pixel colors from images and display color codes

URL Encoder/Decoder

Encode and decode URL special characters

Base64 Converter

Encode and decode text to/from Base64 format

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates

Favicon Generator

Create favicon.ico files from images

3D

3D model viewing tools

3D Model Viewer

View GLTF/GLB/OBJ/USDZ format 3D models

VRM Avatar Viewer

View and interact with VRM files (3D avatars) with expression support

Math & Statistics

Function graphing and statistical calculation tools

Function Plotter

Plot mathematical functions with multiple function support

Statistics Calculator

Calculate mean, median, variance, and standard deviation with graphs

Linear Regression

Calculate regression lines and correlation coefficients from data

Probability Distribution Simulator

Simulate binomial and normal distributions

Text & Data Processing

Text conversion, character counting, and data processing tools

Character Counter

Instantly count characters, lines, and bytes in text

Regex Tester

Test regular expression matches

Health

Body surface area, BMI, and metabolic rate calculation tools

BMI Calculator

Calculate BMI (Body Mass Index) from height and weight

Body Surface Area Calculator

Calculate body surface area from height, weight, and age

BMR & TDEE Calculator

Calculate basal metabolic rate and total daily energy expenditure