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Free, instant, and 100% private. Essential utilities for coding, security, conversions, and networking — directly in your browser.
JSON Formatter & Beautifier
Format, beautify, and validate raw JSON with customizable indentation, collapsible tree view, inline line-number error highlights, and minification.
Password Generator
Generate customizable, cryptographically secure passwords and passphrases with rules for numbers, symbols, uppercase letters, and visual strength/entropy metrics.
Interactive Regex Tester & Evaluator
Build, test, and debug regular expressions in real-time with dynamic match highlighting, regex flag toggles, capture group breakdowns, and cheat-sheet reference guides.
JWT Studio (Encoder, Decoder & Signer)
Encode, decode, sign, and verify JSON Web Tokens (JWT) using HMAC algorithms (HS256, HS384, HS512) with custom secret keys and interactive payload editing.
UUID Generator
Generate universally unique identifiers (UUID v4 random, UUID v7 time-sortable, or Nil UUIDs) in bulk with custom casing, hyphenation options, and file export.
Color Studio & Contrast Checker
Convert colors across HEX, RGB, HSL, and OKLCH formats, test WCAG 2.1 AA/AAA contrast ratios against light and dark text, and export CSS custom property palettes.
Base64 Encoder & Decoder
Convert text or uploaded files into Base64 format and decode Base64 strings back to original content with live image preview (PNG, JPG, WebP, SVG) and one-click copy.
Text Diff Checker & Comparison
Compare code snippets or plain text side-by-side or unified to highlight additions, deletions, and line changes with difference filtering and file export.
JSON to TypeScript & Zod Schema
Convert raw JSON objects into TypeScript interfaces, type aliases, or Zod validation schemas instantly.
Cron Expression Generator & Parser
Build and decode cron expressions using interactive schedules or plain text, featuring instant human-readable explanations and a preview of upcoming execution timestamps.
cURL to Code Converter
Transform cURL HTTP requests into clean, executable code snippets for JavaScript (fetch/axios), Python (requests), Node.js, Go, PHP, and Rust.
SVG to React / Vue / Svelte Component
Convert raw SVG markup into clean React (TSX/JSX), Vue 3, or Svelte UI components with customizable props, icon styling, and TypeScript types.
.env File Formatter & Key Validator
Clean, format, sort alphabetically, and validate configuration keys in .env files to eliminate syntax errors, duplicates, and missing variables before deployment.
User Agent Parser & Inspector
Parse and inspect browser User-Agent strings to extract detailed browser versions, operating systems, hardware device types, and rendering engines.
Hash Generator (SHA-256, SHA-512, SHA-1, MD5)
Generate cryptographic checksums instantly from plain text or uploaded files using SHA-256, SHA-512, SHA-384, SHA-1, and MD5 hashing algorithms.
HMAC Generator (SHA-256 / SHA-512)
Generate hash-based message authentication codes (HMAC) using secret keys with SHA-256, SHA-512, or MD5 algorithms to verify data integrity and API signatures.
chmod Permission Calculator
Calculate Linux file permissions using an interactive checkbox matrix, generating numeric octal codes (e.g. 755), symbolic notation (rwxr-xr-x), and ready-to-use command snippets.
QR Code Generator
Generate customized QR codes for website URLs, plain text, Wi-Fi credentials, vCards, and emails with logo embedding, custom colors, and PNG/SVG export formats.
LLM Token Counter & Cost Estimator
Estimate token counts and API invocation costs for text prompts across OpenAI (GPT-4o), Anthropic (Claude 3.5 Sonnet), and Google (Gemini 1.5 Pro) AI models.
AI System & Prompt Studio
Design and craft structured system prompts for ChatGPT, Claude, Gemini, and Midjourney using persona roles, contextual variables, output formatting constraints, and template presets.
JSON to AI Structured Schema
Convert sample JSON objects into validated JSON Schema definitions compatible with OpenAI Structured Outputs, Claude Function Calling, and Gemini schemas.
CSV ↔ JSON Converter
Convert CSV files and tabular data to JSON array objects or back to CSV, featuring custom delimiters (comma, tab, pipe), file upload, interactive table previews, and file export.
YAML ↔ JSON Converter
Convert configuration files seamlessly between YAML and JSON formats with support for multi-document structures, anchor resolution, and live syntax validation.
JWT Decoder & Inspector
Decode and inspect JSON Web Tokens (JWT) to analyze header parameters, payload claims, token signatures, expiration dates, and issued timestamps.
Markdown Studio & Live Previewer
Write, format, and render GitHub-Flavored Markdown with a side-by-side live preview, document statistics, table formatting tools, and HTML/MD export.
CIDR & Subnet Calculator
Analyze IPv4 subnets from CIDR notation to calculate netmasks, wildcard masks, network and broadcast addresses, usable IP address ranges, and total host counts.
IPv4 & IPv6 Address Converter
Convert IP addresses across IPv4 dotted decimal, integer decimal, hexadecimal, binary, and expanded/compressed IPv6 representations with instant validation.
Unix Timestamp Converter
Convert Unix epoch timestamps (in seconds or milliseconds) to ISO 8601, UTC, and local date formats with a live current timestamp counter and offset controls.
Time Zone Converter & World Clock
Convert date and time values across multiple world time zones simultaneously with interactive location selection, UTC offset calculations, and meeting scheduling tools.
Image to Base64 Converter
Convert PNG, JPG, WebP, GIF, and SVG image files into Data URI Base64 strings with instant image preview, file size stats, and copyable CSS/HTML image tags.
SVG Minifier & Optimizer
Minify and optimize SVG files by stripping unnecessary metadata, comments, editor tags, and unused attributes with side-by-side markup diffs and file size savings.
Meta Tag Generator & Previewer
Generate SEO meta tags, OpenGraph data, and Twitter Card headers with real-time visual card previews for Google search results, Facebook, Twitter, and LinkedIn.
Robots.txt Generator
Generate valid robots.txt files for search engine crawlers with custom user-agent rules, crawl-delay settings, disallowed paths, and XML sitemap references.
CSS & Tailwind Glassmorphism Generator
Generate glassmorphism CSS frosted glass effects and multi-layer box shadows with visual sliders and instant code export.
JSON Validator
Validate JSON syntax accuracy with precise line and column error indicators, structural sanity checks, and automated formatting suggestions.
JSON Viewer — Tree Explorer
Explore large JSON files using an interactive, searchable tree view with node expansion, key filtering, data type indicators, and single-click node copying.
SQL Formatter & Beautifier
Format and beautify complex SQL queries across PostgreSQL, MySQL, SQLite, and T-SQL dialects with uppercase keyword formatting and clause alignment.
XML Formatter & Beautifier
Format, beautify, and validate raw XML documents with customizable indent spacing, syntax error detection, tag balancing checks, and XML minification.
HTML Formatter & Beautifier
Format, beautify, and clean unformatted HTML code with custom tab indentation, or minify markup to reduce payload sizes for production deployment.
Bcrypt Hash Generator & Verifier
Generate secure Bcrypt password hashes with custom salt cost factors (4–31) and test plain-text passwords against existing Bcrypt strings with instant validation feedback.
Lorem Ipsum Generator
Generate customizable dummy placeholder text by paragraphs, sentences, or word counts in classic Latin or modern theme variants for UI designs and layouts.
SQL INSERT ↔ JSON Converter
Convert SQL INSERT INTO queries into JSON objects or transform JSON arrays into SQL INSERT statements.
URL Encoder & Decoder
Encode text and web links into percent-encoded URL formats or decode encoded URI components back to readable plain text with live input conversion.
HTML Entity Encoder & Decoder
Convert special symbols and markup characters into safe HTML entities (<, >, &) or decode entity strings back to text.
Word & Character Counter
Count words, characters, sentences, and paragraphs in real time while analyzing keyword frequencies, reading grade levels (Flesch-Kincaid), and estimated reading/speaking durations.
Slug Generator
Convert titles and strings into clean, SEO-friendly URL slugs with automatic diacritic normalization, custom separator selection, and case formatting options.
Text Case Converter
Instantly convert code identifiers and raw text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, lowercase, and UPPERCASE with live conversion.
HTTP Status Codes Inspector
Interactive reference guide and quick lookup for all 1xx, 2xx, 3xx, 4xx, and 5xx HTTP response status codes.
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