Ontwikkelaarstools

JSON Validator

Validate JSON data and find errors with line and column numbers. Real-time JSON syntax checking, formatting, and structure analysis.

Color Picker

Pick colors and convert between HEX, RGB, HSL formats

Hash Generator

Calculate MD5, SHA-1, SHA-256 hashes for text

UUID Generator

Genereer UUID v4 en v1 unieke identificatiecodes

Regex Tester

Test and debug regular expressions in real-time

Markdown Preview

Live Markdown editor with real-time rendered preview, supporting headings, code blocks, tables, task lists and more

HTML Preview

Live HTML editor with real-time preview in your browser

JWT Decoder

Decode and inspect JWT tokens

Cron Expression Generator

Generate and explain cron schedule expressions

API Request Tester

Test API endpoints directly in your browser

Border Radius Generator

Create custom CSS border-radius with independent corner control and live preview

Box Shadow Generator

Generate CSS box-shadow with live preview, multiple layers, and copy-ready code

Certificate Decoder

Decode and inspect SSL/TLS X.509 certificates. Parse PEM-encoded certificates to view subject, issuer, validity, SANs, key usage, fingerprints, and raw ASN.1 structure.

Changelog Generator

Generate CHANGELOG.md in Keep a Changelog format with version entries

CHMOD Calculator

Calculate Unix file permissions with interactive interface

Code Formatter

Format and beautify code in JavaScript, CSS, HTML, SQL, and JSON

Code Screenshot

Create beautiful code screenshots with syntax highlighting and customizable backgrounds

Color Palette Generator

Generate harmonious color palettes from a base color with multiple harmony rules

Color Contrast Ratio Checker

WCAG-compliant contrast ratio calculator for accessibility

Cron Expression Parser

Parse cron expressions into human-readable format

CSP Generator

Generate Content Security Policy headers for web applications with preset templates and server config snippets

CSS Gradient Editor

Visual CSS gradient builder with multiple color stops, linear and radial gradient support, angle control, and live preview

CSS Grid Generator

Visual CSS Grid layout generator with drag-and-drop cell placement and responsive code output

CSS Reset Generator

Generate CSS reset and normalize stylesheets with selective rules

CSS Shadow Generator

Visual CSS box-shadow and text-shadow generator with multiple layers

CSS Specificity Calculator

Calculate CSS selector specificity and compare selectors

CSS Variables Generator

Generate CSS custom properties with visual preview. Create color, spacing, and font variables with live preview and export as CSS.

CSV Viewer

View and analyze CSV data in a sortable, filterable table. Auto-detect delimiters, search across columns, and export filtered results.

cURL Converter

Convert cURL commands to JavaScript, Python and more

Docker Compose Generator

Generate docker-compose.yml files visually

Escape/Unescape Tool

Escape and unescape strings for HTML, URL, JavaScript, and more

Favicon Generator

Generate favicon icons from text, emoji, or images in multiple sizes for web and mobile

Font Previewer

Preview Google Fonts with customizable size, weight, spacing and compare fonts side by side

Git Command Builder

Build common git commands visually

Gitignore Generator

Generate .gitignore files for common projects

Gradient Generator

Create CSS gradient backgrounds visually

Heading Checker

Analyze HTML heading structure (H1-H6) for proper hierarchy and SEO best practices

.htaccess Generator

Generate Apache .htaccess rules with a visual interface for redirects, rewrites, security, caching, and more

HTML Color Names

Browse all 148 named HTML colors with hex, RGB values and color swatches

HTML Entities Encoder

Encode and decode HTML entities for safe text rendering

HTML Table Formatter

Format, beautify, and minify HTML table code with validation

HTML Table Generator

Visual HTML table builder with live preview, cell merging, CSV import, and customizable styling options

HTTP Headers Checker

Analyze HTTP security headers and get recommendations

HTTP Status Codes

Look up HTTP status codes and their meanings

JSDoc Generator

Generate JSDoc comments for JavaScript functions with param and return types

JSON Beautifier

Beautify JSON with custom indentation, sort keys, color-coded output and minify

JSON Diff

Compare two JSON objects and highlight differences with deep comparison and path-based diff output

JSON Merger

Merge multiple JSON objects with deep merge, shallow merge and conflict resolution strategies

JSON Path Extractor

Extract data from JSON using path expressions with dot and bracket notation

JSON Schema Generator

Generate JSON Schema from JSON data with auto type detection and validation

JSON Schema Validator

Validate JSON data against a JSON Schema. Real-time validation with error paths, draft version support, and detailed feedback.

JSON to Dart Class

Convert JSON to Dart class definitions with auto-detected types

JSON to Elixir Struct

Convert JSON to Elixir struct definitions with auto-detected types

JSON to Kotlin Data Class

Convert JSON to Kotlin data class definitions with auto-detected types

JSON to PHP Class

Convert JSON to PHP class definitions with type hints

JSON to Scala Case Class

Convert JSON to Scala case class definitions with Option support

JSON to Swift Struct

Convert JSON to Swift Codable struct definitions

JWT Generator

Generate JSON Web Tokens for testing

Markdown Link Checker

Check and validate markdown links, find broken or empty links, and extract all URLs

Markdown Table Generator

Generate Markdown tables from data

Math Equation Renderer

Write and render mathematical equations using LaTeX syntax

Meta Tag Generator

Generate HTML meta tags for SEO, Open Graph, and Twitter Cards

NanoID Generator

Generate NanoID unique identifiers

README Generator

Generate README.md files for projects with badges and standard sections

Regex Cheat Sheet

Comprehensive regex reference with patterns, descriptions, and examples

Regex Generator

Build regular expressions visually from common patterns with real-time testing and match highlighting

Robots.txt Generator

Generate robots.txt files for websites

Schema Markup Generator

Generate Schema.org JSON-LD structured data markup for SEO with an easy form-based interface

SERP Preview

Preview how your page will appear in Google search results with title, URL, and description optimization

Sitemap Generator

Generate XML sitemap files for websites

Social Preview

Preview how your website will look when shared on Twitter, Facebook, LinkedIn and other social media platforms

SQL to TypeScript

Convert SQL CREATE TABLE statements to TypeScript interfaces

Subnet Calculator

Calculate IP subnet details including network address, broadcast address, usable hosts, wildcard mask, and subnet splitting

SVG Viewer

View, edit, and optimize SVG code with live preview, optimization, and download

Text Shadow Generator

Maak prachtige tekstschaduw-effecten met CSS

ULID Generator

Generate sortable ULID unique identifiers

URL Parser

Parse URLs into protocol, host, path and query parts

URL Query Builder

Bouw URL-queryparameters uit sleutel-waardeparen

YAML Linter

Validate YAML syntax with real-time error detection and auto-format

YAML Validator

Validate and check YAML syntax

IBAN Validator

Validate International Bank Account Numbers for 70+ countries