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Developer tools
92 tools for everyday developer work — database explorers, formatters and converters, encoders and crypto, cloud and email testers — right in your browser.
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.gitignore Generator
Create custom .gitignore files with templates for Node.js, Python, Java, and 15+ more languages.
Age Calculator
Calculate exact age in years, months, days, hours, and minutes. Find out when your next birthday is.
ASCII Art Generator
Convert text to ASCII art.
Azure Usage Analyzer
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.
Base32 Encoder/Decoder
Encode and decode text to/from Base32 format. Used in TOTP, URLs, and case-insensitive encoding.
Base64 Encoder/Decoder
Encode and decode text to/from Base64 format with UTF-8 support.
Base64 to Image
Decode a Base64 string or data URL back into an image. Preview and download instantly.
BCrypt Generator
Generate BCrypt password hashes with salt rounds.
Binary/Number Base Converter
Convert numbers between decimal, binary, hexadecimal, and octal formats instantly.
Case Converter
Convert text between different case formats (camelCase, snake_case, etc.).
Certificate Decoder
Decode SSL/TLS certificates. View validity, issuer, subject, and fingerprint information.
Character Counter
Count characters, words, lines, and sentences with real-time stats.
Code Beautifier
Format HTML, CSS, and JavaScript.
Code Diff Viewer
Compare code side-by-side with syntax highlighting. View added, removed, and modified lines.
Code Minifier
Minify JavaScript, CSS, and HTML to reduce file size. See compression statistics.
Color Converter
Convert colors between HEX, RGB, and HSL formats with color picker.
Color Palette Generator
Create harmonious color schemes using color theory. Export as CSS variables.
Color Shade Generator
Generate shades and tints from any color. Perfect for design systems and color palettes.
Common Ports Reference
Quick reference for network ports and services. Search and filter by category.
Cron Expression Generator
Create and understand cron job schedules.
Cron Expression Parser
Explain and visualize cron schedules. View human-readable descriptions and next runs.
CSS Gradient Generator
Create beautiful CSS gradients with visual editor. Linear, radial, and conic gradients.
CSV ↔ JSON Converter
Transform data between CSV and JSON formats.
Custom (Legacy) Encryption
Encrypt and decrypt with the legacy ASP.NET TripleDES and Rijndael/SymmCrypto schemes.
Data URI Generator
Convert text, HTML, CSS, SVG to Data URI format with Base64 or URL encoding.
Date Calculator
Add, subtract, and calculate date differences.
Docker Compose Generator
Create docker-compose.yml files visually. Templates for full-stack apps, WordPress, and more.
Downtime Dashboard
Upload a production downtime report (.xlsx/CSV) for instant charts, then download it as SVG, PNG, PDF, HTML, Excel or CSV.
Environment File Generator
Create .env files with validation. Templates for Node.js, React, Next.js, and Docker.
ETH Gas Calculator
Calculate Ethereum transaction fees with common operation presets.
Favicon Generator
Create favicons from text or emojis. Generate multiple sizes (16x16, 32x32, 64x64) for your website.
File Drop
Upload any file under a key you choose — anyone with that key can download it. No sign-up.
Gemini API Key Tester
Test and validate your Google Gemini API key by sending a real POST request. Generate a response to verify access.
Gmail Sender Stats
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.
Grammar Checker
Check for spelling, grammar, and style issues in your text. Find common mistakes and improve readability.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
Hex Color Picker
Visual color picker with HEX, RGB, and HSL values. Save colors and copy CSS code.
HMAC Generator
Generate HMAC signatures for API authentication.
HTML Entity Encoder
Convert special characters to HTML entities.
HTML to Markdown
Convert HTML code to Markdown syntax. Perfect for content migration and documentation.
HTTP Request Builder
Test REST APIs and HTTP endpoints. Support for all methods, custom headers, and body.
HTTP Status Codes
Complete reference for HTTP status codes from 1xx to 5xx with descriptions.
Image Resizer
Resize images to custom dimensions with aspect ratio lock. Support for PNG, JPEG, and WebP formats.
Image to Base64
Convert images to Base64 data URLs.
IP Address Info
Get detailed information about any IP address including class, type, and binary representation.
JSON Formatter
Format, validate, and beautify JSON data with custom indentation.
JSON to Model
Generate model class properties from JSON for C#, Java, Python, Go, and Kotlin with nested object support.
JSON to TypeScript
Automatically generate TypeScript interfaces from JSON objects with nested type support.
JWT Decoder
Decode JSON Web Tokens to view header, payload, and verify expiration.
JWT Generator
Generate JSON Web Tokens with custom header, payload, and secret. Create authentication tokens.
Loan Calculator
Calculate monthly payments, total interest, and amortization schedule for loans.
Lorem Ipsum Generator
Generate placeholder text with customizable paragraphs and word count.
Markdown Preview
Live markdown to HTML preview. Edit and see results in real-time.
Markdown Table Generator
Create beautiful markdown tables visually. Perfect for GitHub README and documentation.
Markdown to HTML
Convert Markdown syntax to HTML code with live preview. Supports headers, links, lists, and more.
Meta Tags Generator
Generate SEO and social media meta tags for better website visibility and sharing.
MIME Type Identifier
Identify MIME types and file formats from uploaded files. Support for images, documents, audio, video, and more.
Mnemonic Generator
Generate BIP39 mnemonic phrases for crypto wallets. Educational tool for testing purposes.
Open Graph Meta Tags
Generate and preview Open Graph meta tags for social media sharing.
OpenAI API Key Tester
Test and validate your OpenAI API key for gpt-image-1 model. Generate test images to verify access.
Outlook Sender Stats
Connect your Outlook / Microsoft account and see which senders email you the most. Reads only message senders — never your email contents — and stores nothing.
Packing Slip 2-Up
Upload a packing slips PDF (one slip per page) and get a print-ready PDF with two slips on every A4 sheet — half the paper.
Password Strength Checker
Analyze password security with entropy calculation, crack time estimation, and strength scoring.
Percentage Calculator
Calculate percentages, percentage change, increase/decrease, and more with multiple modes.
Placeholder Image Generator
Create custom placeholder images for mockups and prototypes.
POL Converter
Convert between POL and USD using real-time market data.
Polygon Gas Fees
Calculate Polygon transaction fees with presets for common operations.
QR Code Generator
Generate QR codes from text or URLs with customizable size and error correction.
Random Data Generator
Generate fake test data.
Random Number Generator
Generate random numbers with custom ranges. Perfect for dice rolls, lottery, and testing.
Regex Pattern Library
Common regex patterns for validation. Email, URL, phone, date, password patterns and more.
Regex Tester
Test regular expressions with live match highlighting and capture groups.
robots.txt Generator
Control search engine crawling with customizable robots.txt file generation.
SendGrid API Key Tester
Send emails via SendGrid and inspect your API key — permissions, credits, limits, reputation, senders and 30-day activity.
Sitemap Generator
Create XML sitemaps for better SEO. Set priorities and change frequencies.
SQL Formatter
Format and beautify SQL queries.
String Manipulator
Reverse, sort, remove duplicates, and more.
SVG Optimizer
Minify and optimize SVG files. Remove metadata, comments, and whitespace to reduce file size.
Text Diff Checker
Compare two texts and highlight differences.
Text Manipulator
25+ text transformation operations including reverse, sort, remove duplicates, and more.
Time Zone Converter
Convert time between different time zones. Perfect for scheduling international meetings.
Unit Converter
Convert between units of length, weight, temperature, volume, area, speed, and time.
Unix Timestamp Converter
Convert between Unix timestamps and dates instantly.
URL Encoder/Decoder
Encode and decode URLs. Component or full URL encoding modes.
URL Slug Generator
Generate clean, SEO-friendly URL slugs from any text with customizable separators.
User Agent Parser
Identify browser, OS, and device from user agent.
UUID Generator
Generate version 4 UUIDs. Create single or bulk identifiers instantly.
Wallet Address Validator
Validate crypto wallet addresses for multiple blockchains.
Wei/Gwei/ETH Converter
Convert between Wei, Gwei, and ETH units instantly.
Word Counter
Advanced text analysis with character count, word count, reading time, and detailed statistics.
XML Formatter
Format, minify, and validate XML documents.
YAML Converter
Convert between YAML and JSON formats.
