ASCII Table

Complete ASCII table, including decimal, hexadecimal, and binary representations of all 128 characters

ASCII Table - Developer's Toolbox

ASCII Table, American Standard Code for Information Interchange

ASCII Art Generator

Options

Convert images to ASCII character art online. Choose from multiple character sets, adjust output width. Free, runs entirely in the browser.

ASCII Art Generator | Convert Images to Text Art | Developer's Toolbox

Base64 Encoding and Decoding

Free online Base64 encoding and decoding tool with real-time conversion and encoding process visualization. Quickly and efficiently perform Base64 encoding and decoding, suitable for developers and IT professionals.

Base64 Encoding and Decoding Tool | Online Base64 Converter - Developer's Toolbox

Add webpage URLs to convert to Markdown, up to 10 URLs supported

Batch URL to Markdown Tool

Batch URL to Markdown tool can convert multiple webpage URLs to Markdown format simultaneously, supports individual download and batch ZIP download, up to 10 URLs per batch.

Batch URL to Markdown Tool - Convert Multiple Webpages to Markdown

Base Converter

Online base converter supporting conversion between binary, octal, decimal, and hexadecimal. Fast, accurate, and convenient number base conversion tool, suitable for programmers and students.

Base Converter - Binary, Octal, Decimal, Hexadecimal Conversion | Developer's Toolbox

CSS Color Names

Explore all named color values in CSS standards, including RGB and HSL value displays, and real-time color previews. An essential color reference tool for front-end developers.

CSS Color Names | Developer's Toolbox

Unicode Codepoint

Free online Unicode To Code Point conversion tool. Easily convert Unicode characters to corresponding code points, supporting bidirectional conversion. Suitable for developers, designers, and text workers.

Unicode To Code Point - Online Unicode Conversion Tool | Developer's Toolbox

Color Blindness Simulator

Simulate how colors appear to people with different types of color blindness. Supports Protanopia, Deuteranopia, Tritanopia, and more.

Color Blindness Simulator | Developer's Toolbox

Analyze contrast between original and grayscale colors with white background

Color Grayscale Calculator

Free online color grayscale calculator, quickly get the grayscale value of a specified color. Supports multiple color formats, including HEX, RGB, HSL, etc. Suitable for designers, developers, and color enthusiasts.

Color Grayscale Calculator - Online Color Grayscale Value Calculator | Developer's Toolbox

Select preset colors to quickly view grayscale conversion effects

Color Harmony Generator

Generate color harmonies based on color theory. Supports complementary, split-complementary, triadic, tetradic, analogous, and double complementary schemes.

Color Harmony Generator | Developer's Toolbox

Color Luminance Online Calculator

Free online color luminance calculator, real-time calculation and display of color luminance values. Suitable for designers and developers for color contrast and readability analysis.

Color Luminance Calculator | Real-time Color Luminance Value Calculation | Developer's Toolbox

Color Mixer

Blend two colors smoothly with adjustable steps. Supports RGB and HSL color space mixing. Generate CSS gradients instantly.

Color Mixer / Blender | Developer's Toolbox

Color Convert

Online color conversion tool supporting conversions between RGB, HSL, CMYK, and hexadecimal color codes. Easily obtain different color formats, suitable for designers and developers.

Color Convert: RGB, HSL, CMYK Conversion Tool | Developer's Toolbox

Color Palette Generator

Online Tint & Shade palette generator. Generate color scales for design systems and development. Export as CSS variables or Tailwind config.

Color Palette Generator | Developer's Toolbox

Preview Markdown

Click the examples below to quickly experience different types of string encoding

Quick String Examples

Clean template suitable for blog articles

Blog Post

Creative Design

Presentation

Perfect template for social media sharing

Social Media

Input History

Enter image title

Title cannot exceed 50 characters

Title is required

Contrast Ratio, the difference in contrast between text color and background color, is extremely helpful for users with color vision deficiency.

Color Contrast Ratio Demo Page

Contrast Ratio Calculator

Free online color contrast ratio calculator. Input background and text colors for real-time contrast calculation and WCAG accessibility standard checks. Ideal for web designers and developers.

Contrast Ratio Calculator | Color Contrast Checker | Developer's Toolbox

The <wcag>Web Content Accessibility Guidelines (WCAG)</wcag> specify that for AA level, the contrast ratio should be greater than 4.5:1, and for large text, it should be greater than 3:1. For AAA level, the contrast ratio should be greater than 7:1, and for large text, it should be greater than 4.5:1.

Image DataURL Generator and Previewer

Free online tool to generate and preview image DataURLs. Convert images to base64 encoded DataURLs for web development use.

Image DataURL Generator and Previewer | Developer's Toolbox

Apifox

Base64 encoding and decoding with internal principle demonstration

Base64 Encoding Explained

Convert multiple webpages to Markdown format in bulk, with options for individual or ZIP download

Batch URL To Markdown

Convert between binary, octal, and hexadecimal

Binary Converter

Simulate how colors appear to people with color vision deficiency

Generate harmonious color schemes based on color theory

Color Luminance Calculator

Blend two colors and generate smooth gradient transitions

Color Palette

Color Contrast Ratio Calculator

Online CSV table generator, create CSV tables by specifying rows and columns, with copy and download support

CSV Generator

Online CSV to HTML table converter, quickly convert CSV data to HTML table format, with copy and download support

CSV to HTML Table

Online CSV to JSON converter, quickly convert CSV data to JSON format, with copy and download support

CSV to JSON

Online CSV to LaTeX table converter, quickly convert CSV data to LaTeX table format, with copy and download support

CSV to LaTeX Table

Online CSV to Markdown table converter, quickly convert CSV data to Markdown table format, with copy and download support

CSV to Markdown Table

Online CSV to SQL INSERT converter, quickly convert CSV data to SQL INSERT statements, with copy and download support

CSV to SQL INSERT

Online CSV to YAML converter, quickly convert CSV data to YAML format, with copy and download support

CSV to YAML

Online Excel to CSV converter, quickly convert Excel spreadsheet data to CSV format, with copy and download support

Excel to CSV

Online Excel to HTML table converter, quickly convert Excel spreadsheet data to HTML table format, with copy and download support

Excel to HTML Table

Online Excel to JSON converter, quickly convert Excel spreadsheet data to JSON format, with copy and download support

Excel to JSON

Online Excel to Markdown table converter, quickly convert Excel spreadsheet data to Markdown table format, with copy and download support

Excel to Markdown Table

View and strip EXIF metadata from JPEG images

JPEG Metadata Viewer & Stripper

Generate all favicon sizes from a single image, with HTML code snippets

Favicon Generator

Front-end Tech Stack Icons

Detect file type based on binary magic numbers

File Type Detector

CSS Gradient Generator

Online generation of MD5, SHA1, SHA256, SHA512

Hash Generator

Free online HTML entity encoding and decoding service

HTML Entity Encoding

Online HTML table generator, create HTML tables by specifying rows and columns, with copy and download support

HTML Table Generator

Online HTML table to CSV converter, quickly convert HTML table data to CSV format, with copy and download support

HTML Table to CSV

Online HTML table to JSON converter, quickly convert HTML table data to JSON format, with copy and download support

HTML Table to JSON

Online HTML table to LaTeX converter, quickly convert HTML table data to LaTeX table format, with copy and download support

HTML Table to LaTeX

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

HTML To Markdown

Online HTML table to SQL INSERT converter, quickly convert HTML table data to SQL INSERT statements, with copy and download support

HTML Table to SQL INSERT

Online HTML table to YAML converter, quickly convert HTML table data to YAML format, with copy and download support

HTML Table to YAML

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

IEEE 754 Illustration

Extract dominant color palette from uploaded images

Image Color Extractor

Use Github repository as your personal image hosting

MicroGallery - Personal Image Hosting

Image Grayscale Generator

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

Image Placeholder API

Image Share Link Generator

Extract dominant colors from images and generate CSS gradients

Image to CSS Gradient

Add text watermarks to images with customizable position, opacity, and style

Image Watermark

IP Info

Online JSON table generator, create JSON data by specifying rows and columns, with copy and download support

JSON Generator

Online JSON to CSV converter, quickly convert JSON data to CSV format, with copy and download support

JSON to CSV

Online JSON to HTML table converter, quickly convert JSON data to HTML table format, with copy and download support

JSON to HTML Table

Online JSON to LaTeX table converter, quickly convert JSON data to LaTeX table format, with copy and download support

JSON to LaTeX Table

Online JSON to Markdown table converter, quickly convert JSON data to Markdown table format, with copy and download support

JSON to Markdown Table

Online JSON to SQL INSERT converter, quickly convert JSON data to SQL INSERT statements, with copy and download support

JSON to SQL INSERT

Online JSON to YAML converter, quickly convert JSON data to YAML format, with copy and download support

JSON to YAML

Decode and validate JSON Web Tokens with detailed information

JWT Decoder & Validator

Create and sign JSON Web Tokens with custom payloads and signing algorithms

JWT Encoder

Online LaTeX table generator, create LaTeX tables by specifying rows and columns, with copy and download support

LaTeX Table Generator

Markdown CV

Online Markdown editor with WeChat theme support

Markdown Code Editor

Convert between Markdown tables, CSV, and JSON formats

Markdown Table Generator

Online Markdown table generator, create Markdown tables by specifying rows and columns, with copy and download support

Markdown Table Generator Page

Online Markdown table to CSV converter, quickly convert Markdown table data to CSV format, with copy and download support

Markdown Table to CSV

Online Markdown table to HTML converter, quickly convert Markdown table data to HTML table format, with copy and download support

Markdown Table to HTML

Online Markdown table to JSON converter, quickly convert Markdown table data to JSON format, with copy and download support

Markdown Table to JSON

Online Markdown table to LaTeX converter, quickly convert Markdown table data to LaTeX table format, with copy and download support

Markdown Table to LaTeX

Online Markdown table to SQL INSERT converter, quickly convert Markdown table data to SQL INSERT statements, with copy and download support

Markdown Table to SQL INSERT

Online Markdown table to YAML converter, quickly convert Markdown table data to YAML format, with copy and download support

Markdown Table to YAML

Debug and test npm libraries online in the browser console

NPM Online Execution

Free online OCR tool supporting text recognition in multiple languages, based on Tesseract.js technology

OCR Optical Character Recognition

Explore modern OKLCH and OKLAB CSS color spaces

OKLCH Explorer

QR Code Generator

Generate beautiful random color palettes with lock support

Random Color Generator

Real-time editing and running of React single component code

React Live Execution

Semver Range Query

Online SQL INSERT statement generator, create SQL INSERT statements by specifying rows and columns, with copy and download support

Tint

Shade

Full Palette