Converters
Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings online. Supports URL-safe encoding.
Free Web Developer Tools
Online utilities for developers — formatters, generators, converters, and more. All tools run in your browser, no data is sent to any server.
Calculators
Byte Unit Converter
Convert between byte units — bits, bytes, KB, MB, GB, TB, PB. Toggle between SI (1000) and IEC (1024) standards.
Converters
Color Converter (HEX/RGB/HSL)
Convert colors between HEX, RGB, HSL, RGBA, HSLA, and HEX8 formats instantly with a visual color picker.
Converters
CSS Units Converter
Convert between px, rem, em, %, vw, vh, pt, cm, mm, and in. Configurable base font size and viewport dimensions.
Converters
CSV to JSON Converter
Convert CSV data to JSON arrays with auto-detection of delimiters. Table preview, custom options, and proper CSV parsing.
Converters
Hash Generator (MD5/SHA)
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text input. Real-time computation using Web Crypto API.
Converters
HTML Entity Encoder/Decoder
Encode special characters as HTML entities or decode entities back to characters. Named, decimal, and hex formats.
Converters
HTML to Markdown Converter
Convert HTML to clean Markdown. Handles headings, links, images, lists, tables, code blocks, and formatting.
Converters
Image to Base64 Converter
Convert images to Base64 data URIs for embedding in HTML, CSS, or JavaScript. Supports drag-and-drop upload.
Converters
JSON to CSV Converter
Convert JSON arrays to CSV and CSV to JSON. Handles nested objects with dot notation. Custom delimiters and table preview.
Converters
JSON to Go Struct
Convert JSON data to Go struct definitions with json tags. Handles nested structs and proper Go naming conventions.
Converters
JSON to Python Dataclass
Convert JSON data to Python dataclass definitions with type annotations. Supports Optional types and frozen classes.
Converters
JSON to TypeScript
Convert JSON data to TypeScript interfaces. Handles nested objects, arrays, and optional properties.
Converters
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, expiration status, and claims without server-side processing.
Converters
Markdown to HTML Converter
Convert Markdown to HTML with live preview. Supports headings, lists, links, code blocks, and more.
Calculators
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36). Live conversion as you type.
Converters
Pixel to REM Converter
Convert between px and rem units with a configurable base font size. Quick reference table and batch conversion.
Converters
SQL to MongoDB Converter
Convert SQL queries to MongoDB query syntax. Supports SELECT, WHERE, INSERT, UPDATE, DELETE, ORDER BY, and LIMIT.
Checkers
SSL Certificate Decoder
Decode and inspect PEM-encoded SSL/TLS certificates. View subject, issuer, validity dates, and Subject Alternative Names.
Converters
SVG Optimizer
Optimize SVG code by removing comments, metadata, and unnecessary attributes. Preview optimized SVG and see size savings.
Converters
Text Case Converter
Convert text between 11 case formats: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, and more.
Converters
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. View current time, relative dates, and multiple formats.
Converters
URL Encoder/Decoder
Encode or decode URLs and URI components online. Supports space-as-plus encoding.
Converters
URL Slug Generator
Convert titles and text to clean URL slugs. Options for separator, case, max length, and accent transliteration.
Converters
YAML to JSON Converter
Convert between YAML and JSON formats. Supports nested objects, arrays, and common YAML features bidirectionally.
