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Color Tools · 6 tools

Convert between RGB, HSL, and CMYK

Tint/Shade color series generator

Named color values in CSS standards

Online Contrast Ratio calculation

Online Color Luminance calculation

Online Color Grayscale calculation

Interview Guide · 1 tools

Resume written in Markdown

Code · 3 tools

Online Markdown editor with WeChat theme support

Debug and test npm libraries online in the browser console

Real-time editing and running of React single component code

Developer Tools · 9 tools

Team API management tool

SVG icons for front-end technology stack

Semver version range query

Online tree structure generator from Markdown lists

Online browser User-Agent parser

Internal representation of IEEE 754 double-precision floating-point numbers

UUID v4 online generator

Detect file type based on binary magic numbers

Online IP address lookup

Image · 8 tools

Image Grayscale generator

Fast image compressor with no size or quantity limits

Use Github repository as your personal image hosting

Image placeholder generator and API, customizable height, width, color, etc.

DataURL Generator & DataURL Preview

Real-time online QR code generation

Free online JPEG EXIF previewer

Online generator for image sharing links

Encoding and Hashing · 9 tools

Comprehensive symmetric encryption algorithms

Base64 encoding and decoding with internal principle demonstration

Convert Unicode to Code Point

Unicode to UTF-8 conversion with internal principle demonstration

Unicode to UTF-16 conversion with internal principle demonstration

Free online URL encoding and decoding service

Free online HTML entity encoding and decoding service

Online generation of MD5, SHA1, SHA256, SHA512

ASCII code table

Format · 2 tools

Real-time HTML to Markdown conversion, supporting complex syntax like tables and code blocks

Convert between binary, octal, and hexadecimal