Generate random secure passwords

Check password strength in real time and get actionable improvement tips. All processing happens locally in the browser.

Generate htpasswd file for Basic authentication.

Generate MD5, SHA-1, SHA-256 hash values.

Calculate BMI from height and weight.

Calculate standard weight based on BMI 22.0.

Estimate muscle mass from age, height, and weight and provide reference values.

Assess growth percentiles for infants and young children (0-5 years) from height and weight.

Simple diagnosis of male pattern baldness (AGA) progression. Hair loss pattern check based on Hamilton-Norwood classification.

Calculate Basal Metabolic Rate from age, height, and weight.

Calculate daily calorie needs based on activity level.

Calculate recommended daily water intake from body weight.

Calculate caffeine intake from beverage types and amounts.

Calculate pure alcohol intake from alcoholic beverages.

Calculate ideal sleep duration from bedtime and wake time.

Quick self-assessment for stress level using a short questionnaire and score.

Simple diagnosis of sleep quality and sleep disorder risk. Check for insomnia, sleep apnea, and circadian rhythm disorders.

Estimate your tendencies across four axes (Extraversion/Introversion, Concrete/Abstract, Logic/Empathy, Planning/Flexibility).

Count characters and words in text

Highlight differences between two texts or code

Convert line breaks for any OS.

Remove duplicate lines from text.

Remove HTML tags and extract plain text from HTML source.

Remove image background automatically using AI

Reduce image file size while maintaining quality.

Resize images for social media and websites.

Convert between JPG, PNG, and WebP formats.

Generate website favicons from images.

Extract dominant colors from images to generate color palettes.

Create placeholder images with size/color/text (PNG/JPG).

Generate QR codes easily

Convert length, area, weight, volume, temperature, and clothing sizes offline.

Advanced calculator & scientific calculator. Supports arithmetic, trigonometric, logarithmic, exponential, square root, factorial functions. History save & keyboard operation.

Measure your internet connection speed (Ping, Jitter, Download, Upload) with one click.

Calculate date differences and days until a target date.

Convert Wareki↔Seireki, find age, school years, and zodiac instantly

Merge, split, extract, and delete pages from PDF files.

Convert PDF to images or images to PDF.

Check your current IP address and browser information.

Generate today's lucky color and item randomly

Display remaining time with date/time/timezone and share via URL.

25-minute focus + 5-minute break cycle timer with browser notifications

Convert in real time using latest rates across 170+ currencies

Simulate long-term asset growth with recurring investments and compound interest.

Estimate monthly/yearly net income, taxes, and social insurance from gross salary.

Simple equal split: enter total and people to calculate per-person share.

Compare performance of lump sum investment vs dollar-cost averaging with identical investment amounts.

Compare equal payment vs equal principal, visualize total payments by interest rate

Calculate donation limit from income and family structure (based on Japanese tax system)

Calculate take-home pay after expenses, taxes, and social insurance (based on Japanese tax system)

Convert color codes

Create and customize CSS gradients visually

Check browser and environment information

Select your stack to auto-generate a .gitignore

Encode/decode text and files to Base64 (data URI option)

Preview how your link looks on Social Media (X, Facebook, LINE)

Modern space shooter game with contemporary design

Avoid mines and reveal all cells!

Classic Concentration game. Simple and modern brain training.