Developer Tools

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting, error detection, and customizable indentation. Minify or pretty-print with one click. Free online JSON formatter.

JSON Validator

Validate JSON syntax, find errors with line numbers, and analyze JSON structure. Free online JSON validator.

JSON to CSV

Convert JSON arrays to CSV. Flatten nested objects, custom delimiters, preview table, download CSV.

Base64 Encode

Encode text to Base64 or decode Base64 strings back to plain text. Supports Unicode characters, file uploads, and URL-safe encoding. Free online Base64 encoder and decoder.

Base64 Decode

Decode Base64-encoded strings back to plain text instantly. Includes robust error handling, one-click copy, and auto-detection of URL-safe encoding. Free online Base64 decoder.

JWT Decoder

Decode JSON Web Tokens to inspect header, payload, and expiration status. Color-coded claims with human-readable timestamps. Free online JWT decoder for developers.

URL Encoder

Encode and decode URLs with percent-encoding, parse URL components, and build query strings visually. Essential for web development and API work. Free online URL encoder.

URL Decoder

Decode URL-encoded (percent-encoded) strings with full component breakdown showing protocol, host, path, and query parameters. Free online URL decoder tool.

Regex Tester

Test regular expressions in real-time with live match highlighting, capture group extraction, search-and-replace mode, and common regex presets. Free online regex tester for developers.

Markdown Preview

Write and preview Markdown in real-time. Supports headers, bold, italic, links, code blocks, tables, and lists.

HTML to Markdown

Convert HTML to Markdown. Handles headings, links, images, lists, tables, code blocks using DOMParser.

Diff Checker

Compare two code blocks with LCS-based diff algorithm. View differences in unified or side-by-side mode with line-level change statistics. Free online code diff checker.

Color Converter

Convert between HEX, RGB, HSL, CMYK, HSB color formats. Auto-detect input. Named CSS colors reference.

URL Parser

Parse any URL into its components: protocol, host, path, query parameters, and hash fragment. Edit individual parts and rebuild URLs. Free online URL parser tool.

User Agent Parser

Parse any user agent string to detect browser name and version, operating system, device type, and rendering engine. Free online user agent parser for web developers.

HTML Formatter

Format and beautify messy HTML code with proper indentation and optional attribute sorting. Minify HTML for production use. Free online HTML formatter and beautifier.

CSS Button Generator

Design custom CSS buttons visually with live preview. Includes presets for primary, ghost, pill, neon, and gradient styles. Copy generated CSS code. Free online CSS button generator.

Flexbox Generator

Interactive CSS Flexbox playground with visual controls for parent and child properties. Generate production-ready CSS and HTML code instantly. Free online Flexbox generator.

Fake Data Generator

Generate realistic fake data including names, emails, phone numbers, addresses, and UUIDs. Export as JSON or CSV for testing and development. Free online fake data generator.

XML Formatter

Format and beautify XML documents with proper indentation. Validate XML syntax, detect errors, and minify for production use. Free online XML formatter and validator.

JSON to XML

Convert JSON data to well-formatted XML with customizable root element name and indentation size. Handles nested objects and arrays. Free online JSON to XML converter.

XML to JSON

Convert XML documents to clean JSON format using DOMParser. Handles XML attributes, text content, and arrays automatically. Free online XML to JSON converter for developers.

Markdown to HTML

Convert Markdown to clean HTML with live side-by-side preview. Supports headings, code blocks, tables, lists, and inline formatting. Free online Markdown to HTML converter.

JS Minifier

Minify JavaScript to reduce file size by removing comments, whitespace, and formatting. Or beautify minified code for readability. Size comparison included. Free online JS minifier.

CSS Grid Generator

Interactive CSS Grid playground with visual controls for columns, rows, and gap spacing. Generate production-ready CSS and HTML layout code. Free online CSS Grid generator.

JSON Tree Viewer

Explore JSON data in a collapsible tree view with color-coded types, search functionality, path copying, and structure statistics. Free online JSON tree viewer for developers.

CSS Clip Path Generator

Generate CSS clip-path shapes with presets for triangles, hexagons, stars, and more. Inset and custom polygon modes with live preview. Free online CSS clip-path generator.

YAML Formatter

Format and beautify YAML with customizable indentation. Convert YAML to JSON and JSON to YAML bidirectionally. Validate YAML syntax. Free online YAML formatter and converter.

UUID Generator

Generate UUID v4, NanoID, Short ID, and ULID. Batch generate up to 50 unique IDs. Free online UUID generator.

Hash Generator

Generate cryptographic hashes in MD5, SHA-1, SHA-256, SHA-384, and SHA-512 formats. Hash text or files and verify integrity with hash comparison. Free online hash generator.

Timestamp Converter

Convert Unix timestamps to dates and dates to timestamps. Live clock, ISO 8601, UTC, and relative time.

HTML Entity Encoder

Encode special characters to HTML entities and decode them back. Complete named entities reference with live preview of encoded output. Free online HTML entity encoder and decoder.

SQL Formatter

Format and beautify SQL queries with proper indentation. Syntax highlighting and uppercase keywords option.

Cron Generator

Build cron expressions visually. Common presets, human-readable descriptions, and next 5 run times.

CSS Minifier

Minify CSS to reduce file size or beautify for readability. Size comparison with percentage reduction.

XML Validator

Validate XML syntax in real-time with precise error reporting showing line and column numbers. Displays element count and structure info on valid XML. Free online XML validator.

CSS Formatter

Format and beautify CSS code. Indent options, minify mode. Handles nested rules and media queries.

Regex Generator

Common regex patterns for email, URL, phone, IP, date, password. Custom pattern builder with test area.

Unix Time Converter

Convert Unix timestamps to dates and vice versa. Live counter, UTC, ISO 8601, relative time.

JSON Search

Search within large JSON data structures by key name or value. Shows all matching paths with JSONPath notation and total match count. Free online JSON search tool for developers.

Markdown Editor

Full-featured Markdown editor with side-by-side live preview. Built-in toolbar for headings, bold, italic, links, and code. Copy as Markdown or HTML. Free online Markdown editor.

JWT Generator

Generate JWT tokens with custom header, payload, and HMAC signature. Color-coded segment output for header, payload, and signature parts. Free online JWT token generator.

HTML Entity Decoder

Decode HTML entities back to readable characters with auto-detection. View entity count statistics and before/after comparison. Free online HTML entity decoder tool.

Code Beautifier

Auto-detect and beautify JSON, XML, HTML, CSS, or SQL code with proper formatting. Side-by-side before/after preview with size comparison. Free online multi-language code beautifier.

Log Analyzer

Analyze log files by extracting errors, warnings, IP addresses, and timestamps. Filter by log level and search for patterns. Free online log analyzer for developers.

HTTP Headers Viewer

Parse and analyze HTTP response headers with clear explanations grouped by category (caching, security, CORS, content). Free online HTTP headers viewer for web developers.

File Diff Tool

Compare two text files or code blocks side by side with color-highlighted additions, deletions, and line numbers. Upload files or paste content. Free online file diff tool.

Text Compare

Compare two text blocks side by side with color-highlighted additions and deletions. Ideal for code reviews and document versioning. Free online text compare tool.

HEX to RGB

Convert HEX color codes to RGB and HSL values instantly. Live color preview with complementary and analogous color suggestions. Free online HEX to RGB converter for designers.

RGB to HEX

Convert RGB color values to HEX code with live color preview and HSL output. Adjust red, green, and blue sliders for precise color selection. Free online RGB to HEX converter.

CSS Gradient Generator

Generate CSS linear and radial gradients with multiple color stops and adjustable angles. Live preview with one-click code copy. Free online CSS gradient generator for web design.

SHA Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from text or uploaded files. Compare and verify hash integrity. Free online SHA hash generator for developers.

SQL Beautifier

Format and beautify SQL queries with uppercase keywords, proper indentation, and a minify option for production. Supports SELECT, INSERT, UPDATE statements. Free online SQL beautifier.

Color Palette Extractor

Extract dominant colors from any image using k-means clustering algorithm. Get precise HEX and RGB values for each color. Build design palettes fast. Free online color palette extractor.

SVG Optimizer

Optimize SVG files by removing comments, metadata, empty attributes, and unnecessary whitespace. View before/after size comparison. Free online SVG optimizer and minifier.

API Tester

Test REST APIs with GET, POST, PUT, and DELETE methods. Includes headers editor, request body input, and formatted response viewer. Free online API tester — like Postman in your browser.

Image to CSS

Convert small images to pure CSS pixel art using box-shadow rendering. Each pixel becomes a CSS shadow — no images needed in production. Free online image to CSS converter.

Screenshot to Code

Upload a UI screenshot to extract colors and generate starter HTML/CSS code. Edit and preview live. Free online screenshot to code converter.