ToolBay - Free Online Utilities Collection

Providing various free online tools to help solve your daily problems

We value your privacy. All tool operations are performed locally in your browser. Your uploaded images, files, or input data will not be transmitted to our servers, ensuring your data security and privacy.

All Tools

Background Remover

Automatically identify people and objects in images, remove the background, and generate images with transparent backgrounds

Calligraphy Practice Generator

Generate practice sheets for calligraphy with customizable fonts, styles and layouts for Chinese, Pinyin, English, and numbers

Image Merger

Merge multiple images into one, supporting vertical, horizontal layouts and custom arrangements, perfect for ID photos and certificates

BMI Calculator

Calculate Body Mass Index (BMI) based on height and weight to assess health status

Image Watermarker

Add custom text watermarks to images, with adjustable color, opacity, spacing, and rotation

Image Compressor

Reduce image file size while maintaining image quality, suitable for website optimization

E-Signature Generator

Create personalized electronic signatures, support handwriting or auto-generation, with customizable colors and sizes

Image Format Converter

Convert between various image formats such as JPG, PNG, WEBP, GIF, etc., with options to adjust image quality and size

Color Picker

Online color selection tool, supporting RGB, HEX, HSL and other formats

RMB Amount Converter

Convert numerical amounts to uppercase Chinese RMB format for contracts, invoices, and formal documents

Coordinate System Converter

Convert between common coordinate systems like WGS84, GCJ02, BD09, and CGCS2000, suitable for map development and location data processing

IP Location Lookup

Look up geographical location, ISP and other details of an IP address, helping to understand the source and attributes of IP addresses

Relationship Calculator

Quickly calculate complex family relationship titles, solving confusion caused by complicated family relations

Periodic Table

Interactive periodic table with detailed element information, physical and chemical properties, and historical data

Historical Map

Interactive map tool for exploring world history changes