Free Tools That Don't Require Signups or Show Ads

📋 TLDR: Quick Links to Free No-Signup Tools

• 🔧 ToolBrew - Unit converters, text tools, and calculators
• 💰 That Easy - Financial calculators and productivity utilities
• 🛠️ Thibault.sh Tools - Developer tools, text formatters, and utilities
• 🔐 CyberChef - Data encoding, encryption, and analysis tools
• 📥 Cobalt - Video downloader without ads or tracking
• 📄 Easy Invoice PDF - Professional invoice generator
• 📊 Simon Willison’s Tools - Data formatters and web utilities
• 📱 Just a QR Code - Customizable QR code generator
• 🎯 Awesome Little Online Tools - Comprehensive collection of web tools
• 🌐 IntoDNS - DNS analysis and domain health checks
• 📡 Ping.pe - Network testing and diagnostic tools

🔗 ToolBrew (toolbrew.co)

Unit Converters

• Length, weight, temperature, volume, area, speed converters
• Currency converter with real-time exchange rates

Text Tools

• Case converter (upper, lower, title, sentence case)
• Word counter and character counter
• Text diff tool for comparing two texts
• JSON formatter for pretty-printing JSON data

Calculators

• Basic calculator for simple math
• Percentage calculator for quick percentage calculations
• Tip calculator for restaurant bills
• BMI calculator for body mass index

Time Tools

• Timestamp converter for Unix timestamps
• Date calculator for adding/subtracting dates
• Time zone converter for global time conversion

🔗 That Easy (thateasy.me)

💰 Financial & Money Tools

• 🏠 Mortgage Calculator - Estimate monthly payments with taxes and insurance
• 📊 Amortization Calculator - View detailed loan payment schedules
• 💳 Loan EMI Calculator - Calculate equated monthly installments
• 📈 Compound Interest Calculator - See how your money grows over time
• 🎯 FIRE Calculator - Calculate Financial Independence timeline
• 🧾 Tip Calculator - Calculate tips and split bills
• 💰 Retirement Savings Calculator - Plan your retirement goals
• 💸 Discount Calculator - Calculate sale prices and savings
• 📊 Percentage Calculator - Quick percentage calculations
• 💱 Currency Converter - Convert between currencies
• 🏛️ Property Tax Calculator - Estimate property tax payments

🏥 Health & Fitness Tools

• ⚖️ BMI Calculator - Calculate Body Mass Index and weight status
• 🍎 Calorie Calculator - Estimate daily calorie needs
• 💪 Protein Calculator - Calculate daily protein requirements
• 🗓️ Ovulation Calculator - Track fertility and cycles
• 🤰 Pregnancy Calculator - Calculate due dates and milestones

⏰ Date & Time Tools

• 🎂 Age Calculator - Calculate exact age from birth date
• 📅 Date Difference Calculator - Calculate days between dates
• ⏱️ Stopwatch Timer - Simple stopwatch functionality
• 🍅 Pomodoro Timer - Productivity timer with work/break cycles

🛠️ Productivity & Utilities

• 🔐 Password Generator - Create secure passwords
• 📱 QR Code Generator - Generate QR codes for various purposes
• 📝 Word Counter - Count words in text
• 🔢 Character Counter - Count characters with/without spaces
• 📄 PDF Converter - Convert files to/from PDF format
• ✏️ PDF Editor - Basic PDF editing capabilities
• 🎨 Color Picker - Pick colors and get hex/RGB values
• 🖼️ Color Palette Extractor - Extract color palettes from images
• 📊 PO to Excel Converter - Convert purchase orders to Excel
• 🖼️ Image Resizer & Converter - Resize and convert image formats

🎮 Games & Fun Tools

• 🪙 Coin Flip Simulator - Virtual coin flipper
• 🎲 Random Number Generator - Generate random numbers
• 🎯 Dice Roller - Roll virtual dice with various sides
• ⚡ Reaction Time Test - Test your reaction speed
• ⌨️ Typing Speed Test - Measure and improve typing speed
• 🏖️ Holiday Optimiser - Plan optimal holiday dates

🔗 Thibault.sh Tools (thibault.sh/tools)

📝 Text Tools (7 tools)

• 📊 Text Analysis - Character count, word count, and more
• 🎨 Text Formatter - Format and beautify text
• 🔍 Diff Checker - Compare text differences
• 🔤 Case Converter - Convert text case (upper, lower, title)
• 🔀 List Randomizer - Randomize and shuffle lists
• 📄 Lorem Ipsum Generator - Generate placeholder text for designs
• ➕ +1 additional text tool

💻 Developer Tools (26 tools)

• 📋 JSON Formatter - Format and validate JSON
• 🔄 YAML ⇄ JSON Converter - Convert between YAML and JSON formats
• 🔢 Base64 - Encode and decode Base64 strings
• 🔒 Hash Generator - Generate various hash values
• 🌐 URL Encoder - Encode and decode URLs
• 🪪 JWT Viewer - Decode and inspect JWT tokens
• ⏰ Cron Debugger - Debug and test cron expressions
• ➕ +20 additional developer tools

🎨 Design Tools (5 tools)

• 🎭 Pattern Generator - Create custom SVG patterns
• 🌈 Color Palette Generator - Extract color palettes from images
• 📏 CSS Unit Converter - Convert between px, rem, and em
• 🖼️ Favicon Generator - Generate multi-platform favicons
• 🎨 Gradient Generator - Create beautiful CSS gradients

⛓️ Web3 Tools (4 tools)

• 🔍 ENS Lookup - Resolve ENS names to addresses and vice versa
• ⛽ Gas Calculator - Calculate Ethereum transaction costs
• 📜 Transaction Decoder - Decode Ethereum transaction data
• ✍️ Signature Verifier - Verify Ethereum signatures

🌐 DNS Tools (2 tools)

• 🔎 DNS Lookup - Perform DNS lookups and view records
• ℹ️ WHOIS Lookup - Look up domain registration information

🛠️ Utilities (9 tools)

• 📐 Unit Converter - Convert between length, weight, temperature units
• 🔐 Password Generator - Generate secure passwords
• 😊 Emoji Picker - Search and copy emojis easily
• 📱 QR Code Generator - Generate customizable QR codes
• 📏 Image Dimension Checker - Check image dimensions and file size
• 🎲 Dice Generator - Roll virtual dice with different sides
• ➕ +3 additional utility tools

🔗 CyberChef (gchq.github.io/CyberChef/)

🔄 Encoding/Decoding Tools

• 🔢 Base64, Hex, Binary, URL encoding/decoding
• 🌐 HTML entity encoding/decoding
• 🔤 Unicode code point conversion
• 📡 Morse code encoder/decoder

🔐 Encryption & Cryptography

• 🛡️ AES, DES, Blowfish encryption/decryption
• 🔀 XOR cipher, ROT13 cipher
• 🔒 Hash functions (MD5, SHA-1, SHA-256, etc.)
• 🗝️ HMAC generation

📋 Data Format Tools

• 📄 JSON formatter/minifier/validator
• 🏗️ XML formatter/beautifier
• 📊 CSV analysis and manipulation
• 📝 YAML processing and validation

🌐 Network Tools

• 🖥️ IP address manipulation and conversion
• 💻 MAC address converter
• 🔗 URL parsing and manipulation
• 🔍 DNS lookup utilities

📦 Compression Tools

• 🗜️ Gzip, Bzip2, Zlib compression/decompression
• 📁 Tar archive operations
• 📂 ZIP file operations

🖼️ Image Processing

• 📸 EXIF data extraction and viewing
• 🎨 Image encoding/decoding
• 🔄 Image format conversion

⚡ And hundreds more specialized operations

🔗 Cobalt (cobalt.tools)

📥 Video Downloader

• 📺 YouTube video downloader (working instance: cobalt.meowing.de)
• 🎬 Support for multiple video formats and quality options
• 🎵 Audio extraction from videos
• 🚫 No ads, no tracking, no watermarks
• 🌍 Works with various video platforms

🔗 Easy Invoice PDF (easyinvoicepdf.com)

📄 Invoice Generator

• 📋 Multiple professional templates (including Stripe template)
• 🏢 Add company details, logo, and contact information
• 📝 Add line items with descriptions, quantities, and prices
• 💰 Calculate taxes and discounts automatically
• ⬇️ Download as professional PDF instantly
• 🚫 No signup or registration required

🔗 Simon Willison’s Tools (tools.simonwillison.net)

📊 Data Tools

• 📄 JSON formatter and validator with syntax highlighting
• 🗃️ SQL query runner for testing SQL statements
• 📈 CSV to JSON converter with preview
• 🔄 YAML to JSON converter
• 🔢 Base64 encoder/decoder

📝 Text Tools

• 🔍 Regular expression tester with real-time matching
• 🌐 URL encoder/decoder
• 📖 Markdown preview with live rendering
• 🏷️ HTML entity encoder/decoder
• 🔒 Text hash generator

🌐 Web Tools

• 📡 HTTP request tester for API testing
• 🪪 JWT decoder for JSON Web Tokens
• 🆔 UUID generator for unique identifiers
• 🔗 Slug generator for URL-friendly strings
• 📦 HTML minifier

⏰ Date/Time Tools

• 📅 Timestamp converter for Unix timestamps
• 📆 Date parser for various date formats
• 🕐 Unix time converter with human-readable output

🔗 Just a QR Code (justaqrcode.com)

📱 QR Code Generator

• 🌐 Generate QR codes for URLs and websites
• 📝 Text QR codes for plain text messages
• 👤 Contact information (vCard) QR codes
• 📶 WiFi network credentials QR codes
• 📧 Email address QR codes
• 📞 Phone number QR codes
• 💬 SMS message QR codes
• 🎨 Customizable size, colors, and error correction levels

🔗 Awesome Little Online Tools (github.com/KeyboardInterrupt/awesome-little-online-tools)

🎯 Comprehensive Collection Including:

• 🖼️ Image tools (compressors, converters, editors, optimizers)
• 📝 Text tools (formatters, analyzers, generators, validators)
• 💻 Development tools (code formatters, validators, minifiers)
• 🔢 Math tools (calculators, converters, equation solvers)
• 🌐 Network tools (ping, DNS, WHOIS, IP tools)
• 🔒 Privacy tools (temporary email, password generators, VPN info)
• 📁 File tools (converters, compressors, validators)
• ➕ And hundreds more categorized by functionality

🔗 IntoDNS (intodns.com)

🌐 DNS Analysis Tools

• 🔍 Comprehensive DNS record lookup (A, AAAA, MX, NS, TXT, CNAME, SOA)
• ✅ Domain health check with detailed scoring
• 📧 Mail server configuration validation
• 🔐 DNSSEC validation and testing
• 🛡️ SPF record validation for email security
• 📬 DKIM record check for email authentication
• 🌍 Nameserver consistency check across multiple servers
• 📅 Domain expiration date monitoring
• 🚫 IP reputation and blacklist checking

🔗 Ping.pe (ping.pe)

📡 Network Testing Tools

• 🏓 Ping test from multiple global locations
• 🗺️ Visual traceroute with map visualization
• 🔍 Comprehensive DNS lookup with all record types
• ℹ️ WHOIS information for domain registration details
• 🚪 Port scanner for checking open ports
• 🔒 SSL certificate checker with expiration dates
• 📋 HTTP headers viewer for web debugging
• ⚡ Website speed test with performance metrics
• 📍 IP geolocation with map visualization
• 🔄 Reverse IP lookup for shared hosting detection
• 🌍 DNS propagation checker across global servers

Crepi il lupo! 🐺