All Developer Tools

30 free tools across 8 categories

30 of 30 tools

JWT Decoder

Decode and inspect JWT tokens — view header, payload, and signature information instantly.

security

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input. Fast, secure, and browser-based.

security

JSON Formatter

Format, validate, and beautify your JSON data with syntax highlighting and error detection.

formatters

Base64 Encoder / Decoder

Encode or decode text and files to and from Base64 format instantly.

encoders

URL Encoder / Decoder

Encode or decode URLs and query parameters for proper web transmission.

encoders

HTML Entities Encoder

Convert special characters to HTML entities and vice versa for safe web rendering.

encoders

Password Generator

Generate strong, secure passwords with customizable length and character sets.

generators

UUID Generator

Generate UUID v4 identifiers for databases, APIs, and distributed systems.

generators

Lorem Ipsum Generator

Generate placeholder text for your designs, mockups, and layouts.

generators

YAML to JSON Converter

Convert YAML data to JSON format and vice versa with live preview.

converters

Color Converter

Convert between HEX, RGB, HSL, and named CSS colors with live preview.

converters

Case Converter

Convert text between camelCase, snake_case, kebab-case, and more.

text

Markdown Preview

Write and preview Markdown in real-time with syntax highlighting and HTML output.

text

Text Diff Checker

Compare two texts side by side and highlight the differences between them.

text

Image Converter

Convert images between formats using your browser's Canvas API. No uploads needed.

images

SQL Formatter

Format and beautify SQL queries for better readability and maintainability.

formatters

Regex Tester

Test regular expressions in real-time with match highlighting, group capture, and flag controls.

text

XML Formatter

Format, validate, and beautify XML data with syntax highlighting.

formatters

JSON to CSV for Excel

Convert JSON arrays into CSV files ready for Excel. Handles nested objects, arrays, and Unicode with BOM.

converters

CSS px to rem Converter

Convert pixel values to rem units instantly. Includes a reference table for common values at any base font size.

converters

Kubernetes YAML Validator

Validate Kubernetes YAML manifests — check pods, deployments, services, and more for correct structure and required fields.

web

Docker Compose Validator

Validate docker-compose.yml files for correct syntax, structure, and required fields like services, images, and ports.

web

GitHub Actions Validator

Validate GitHub Actions workflow YAML files — check triggers, jobs, steps, and required action syntax.

web

JWT Expiration Checker

Check when a JWT token expires. Decode JWT headers and payloads, inspect exp, iat, and other claims in real-time.

security

UUID v7 Generator

Generate time-ordered UUID v7 identifiers. UUID v7 combines a Unix timestamp with random bits for sortable, database-friendly unique IDs.

generators

Word & Character Counter

Count words, characters, sentences, and paragraphs in real-time as you type. Perfect for writers, students, and SEO professionals.

text

Remove Duplicate Lines

Remove duplicate lines from any text, sort alphabetically or reverse, and get a clean unique list. Perfect for cleaning up lists and data.

text

Wi-Fi QR Code Generator

Generate a QR code that smartphones scan to join your Wi-Fi instantly. Enter SSID, password, and encryption type.

generators

Secure WPA2 Password Generator

Generate strong Wi-Fi passwords for routers — 16-20 chars, no ambiguous characters like l, 1, O, 0 that are hard to type.

generators

QR Code Generator

Generate QR codes instantly from any text or URL. Download as SVG. No tracking, no server uploads, pure client-side generation.

generators

Formatters

Format and beautify your code and data

Browse Formatters →

Encoders & Decoders

Encode and decode data in various formats

Browse Encoders & Decoders →

Generators

Generate passwords, UUIDs, and more

Browse Generators →

Converters

Convert between different formats and units

Browse Converters →

Text Tools

Manipulate and analyze text content

Browse Text Tools →

Image Tools

Process and convert images in your browser

Browse Image Tools →

Security

Hash, encrypt, and analyze security data

Browse Security →

Web Tools

Utilities for web development and debugging

Browse Web Tools →