All Tools

Calculate Body Mass Index and health level

Reverse text by character, word, or line

Online countdown timer with custom hours, minutes and seconds, alarm on finish.

Delete unwanted pages from a PDF and download the result, all in your browser

Paste JSON and get TypeScript interfaces, including nested objects and arrays

Find the best bedtime or wake-up time based on 90-minute sleep cycles

Online batch text replacement tool, supporting normal replacement and regular expression replacement, with advanced options such as case sensitivity and whole word matching.

Remove Chinese and English punctuation from text

A multifunctional online calculator supporting basic operations, scientific calculations, and percentage calculations, with a clean and clear interface.

Visual cron expression generator for scheduled tasks

Decode QR codes from images or camera locally. Privacy-friendly, no upload to server.

Convert between binary, octal, decimal and hexadecimal. Supports decimals and large integers in real time.

Convert PDF pages to PNG images (local processing)

Add or subtract days, weeks, months or years from any date

Calculate trip fuel cost from distance, consumption and fuel price.

Calculate exact age in years, months, days