A comprehensive collection of 102 developer utilities for security, Web3, and productivity.
Showing 102 of 102 tools.
Create super secure, complex, and random passwords that are difficult to crack or guess. Works entirely in your browser.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
Encode and decode text to/from Base64 format with UTF-8 support.
Decode JSON Web Tokens to view header, payload, and verify expiration.
Generate version 4 UUIDs. Create single or bulk identifiers instantly.
Format, validate, and beautify JSON data with custom indentation.
Test regular expressions with live match highlighting and capture groups.
Encode and decode URLs. Component or full URL encoding modes.
Convert colors between HEX, RGB, and HSL formats with color picker.
Generate QR codes from text or URLs with customizable size and error correction.
Generate placeholder text with customizable paragraphs and word count.
Live markdown to HTML preview. Edit and see results in real-time.
Encrypt and decrypt text using AES-256-CBC with your own key and IV.
Encrypt and decrypt with the legacy ASP.NET TripleDES and Rijndael/SymmCrypto schemes.
Encrypt or decrypt multiple values at once with the same key and IV.
Calculate Polygon transaction fees with presets for common operations.
Convert between POL and USD using real-time market data.
Calculate Ethereum transaction fees with common operation presets.
Validate crypto wallet addresses for multiple blockchains.
Convert between Wei, Gwei, and ETH units instantly.
Convert text between different case formats (camelCase, snake_case, etc.).
Count characters, words, lines, and sentences with real-time stats.
Convert between Unix timestamps and dates instantly.
Generate HMAC signatures for API authentication.
Transform data between CSV and JSON formats.
Convert images to Base64 data URLs.
Decode a Base64 string or data URL back into an image. Preview and download instantly.
Compare two texts and highlight differences.
Convert special characters to HTML entities.
Reverse, sort, remove duplicates, and more.
Generate BCrypt password hashes with salt rounds.
Identify browser, OS, and device from user agent.
Format, minify, and validate XML documents.
Convert between YAML and JSON formats.
Format and beautify SQL queries.
Add, subtract, and calculate date differences.
Create and understand cron job schedules.
Format HTML, CSS, and JavaScript.
Generate fake test data.
Convert text to ASCII art.
Create custom placeholder images for mockups and prototypes.
Convert numbers between decimal, binary, hexadecimal, and octal formats instantly.
Analyze password security with entropy calculation, crack time estimation, and strength scoring.
Convert between units of length, weight, temperature, volume, area, speed, and time.
Generate SEO and social media meta tags for better website visibility and sharing.
Automatically generate TypeScript interfaces from JSON objects with nested type support.
Generate model class properties from JSON for C#, Java, Python, Go, and Kotlin with nested object support.
Create custom .gitignore files with templates for Node.js, Python, Java, and 15+ more languages.
Generate clean, SEO-friendly URL slugs from any text with customizable separators.
Control search engine crawling with customizable robots.txt file generation.
Calculate percentages, percentage change, increase/decrease, and more with multiple modes.
Calculate exact age in years, months, days, hours, and minutes. Find out when your next birthday is.
Minify JavaScript, CSS, and HTML to reduce file size. See compression statistics.
Complete reference for HTTP status codes from 1xx to 5xx with descriptions.
Create harmonious color schemes using color theory. Export as CSS variables.
Convert time between different time zones. Perfect for scheduling international meetings.
Create XML sitemaps for better SEO. Set priorities and change frequencies.
Calculate monthly payments, total interest, and amortization schedule for loans.
Advanced text analysis with character count, word count, reading time, and detailed statistics.
Convert Markdown syntax to HTML code with live preview. Supports headers, links, lists, and more.
Convert text, HTML, CSS, SVG to Data URI format with Base64 or URL encoding.
25+ text transformation operations including reverse, sort, remove duplicates, and more.
Compare code side-by-side with syntax highlighting. View added, removed, and modified lines.
Generate random numbers with custom ranges. Perfect for dice rolls, lottery, and testing.
Get detailed information about any IP address including class, type, and binary representation.
Generate BIP39 mnemonic phrases for crypto wallets. Educational tool for testing purposes.
Generate shades and tints from any color. Perfect for design systems and color palettes.
Check for spelling, grammar, and style issues in your text. Find common mistakes and improve readability.
Create docker-compose.yml files visually. Templates for full-stack apps, WordPress, and more.
Resize images to custom dimensions with aspect ratio lock. Support for PNG, JPEG, and WebP formats.
Minify and optimize SVG files. Remove metadata, comments, and whitespace to reduce file size.
Generate SSH key pairs for secure authentication. Support for RSA and Ed25519 algorithms.
Create .env files with validation. Templates for Node.js, React, Next.js, and Docker.
Quick reference for network ports and services. Search and filter by category.
Test REST APIs and HTTP endpoints. Support for all methods, custom headers, and body.
Common regex patterns for validation. Email, URL, phone, date, password patterns and more.
Decode SSL/TLS certificates. View validity, issuer, subject, and fingerprint information.
Explain and visualize cron schedules. View human-readable descriptions and next runs.
Generate JSON Web Tokens with custom header, payload, and secret. Create authentication tokens.
Create beautiful markdown tables visually. Perfect for GitHub README and documentation.
Encode and decode text to/from Base32 format. Used in TOTP, URLs, and case-insensitive encoding.
Convert HTML code to Markdown syntax. Perfect for content migration and documentation.
Visual color picker with HEX, RGB, and HSL values. Save colors and copy CSS code.
Create beautiful CSS gradients with visual editor. Linear, radial, and conic gradients.
Generate and preview Open Graph meta tags for social media sharing.
Send test push notifications to Apple (APNS) and Android (FCM v1) devices via Azure Notification Hubs.
Test SMTP server configuration and send test emails. Verify email server settings and connectivity.
Test a MySQL connection, list databases, browse tables and preview rows. Convert between connection details and a connection string both ways.
Test a PostgreSQL connection, list databases, browse tables and preview rows. Convert between connection details and a connection string both ways.
Test a Microsoft SQL Server connection, browse databases and tables, and manage logins, server roles, database users & roles. Convert between connection details and a connection string both ways.
Test and validate your OpenAI API key for gpt-image-1 model. Generate test images to verify access.
Test and validate your Google Gemini API key by sending a real POST request. Generate a response to verify access.
Send emails via SendGrid and inspect your API key — permissions, credits, limits, reputation, senders and 30-day activity.
Identify MIME types and file formats from uploaded files. Support for images, documents, audio, video, and more.
Create favicons from text or emojis. Generate multiple sizes (16x16, 32x32, 64x64) for your website.
Connect with a storage connection string to browse containers, list blob metadata, and run live single or bulk keyword searches with CSV export.
Connect with an API token or Global API Key to list every domain, browse all DNS records, inspect SSL/TLS & zone settings, search DNS across all domains, and see account-wide stats. Read-only.
Connect with an R2 API token to browse buckets, list object metadata, run live single or bulk keyword searches, and analyze storage usage by type, size, and age.
Connect your Gmail with Google sign-in and see which senders email you the most. Reads only message headers (the From line) — never your email contents — and stores nothing.
Connect your Outlook / Microsoft account and see which senders email you the most. Reads only message senders — never your email contents — and stores nothing.
Upload your Azure Cost Management / billing usage CSV export and instantly visualize spend by service, resource group, location, resource and day. Runs entirely in your browser — your file is never uploaded.
Connect to Linux virtual machines via SSH using passwords or SSH keys. Save and manage multiple connections with secure credential storage.