Free Tools That Don't Require Signups or Show Ads
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
- Debt-to-Income (DTI) Calculator: Calculate your DTI ratio for loan applications
- Mortgage Calculator: Estimate monthly mortgage payments with taxes and insurance
- Amortization Calculator: View detailed loan payment schedules
- Loan EMI Calculator: Calculate equated monthly installments for loans
- Compound Interest Calculator: See how your money grows over time
- Tip Calculator: Calculate tips and split bills
- Retirement Savings Calculator: Plan your retirement savings goals
- FIRE Calculator: Calculate your Financial Independence, Retire Early timeline
- Discount Calculator: Calculate sale prices and savings
- Percentage Calculator: Quick percentage calculations
- Currency Converter: Convert between different 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 based on activity level
- Protein Calculator: Calculate daily protein requirements
- Ovulation Calculator: Track fertility and ovulation cycles
- Pregnancy Calculator: Calculate due dates and pregnancy milestones
Date & Time Tools
- Age Calculator: Calculate exact age from birth date
- Date Difference Calculator: Calculate days between two dates
- Stopwatch Timer: Simple stopwatch functionality
- Pomodoro Timer: Productivity timer with work/break cycles
Productivity & Utilities
- Password Generator: Create secure passwords with customizable options
- QR Code Generator: Generate QR codes for various purposes
- Word Counter: Count words in text
- Character Counter: Count characters with and without spaces
- PDF Converter: Convert files to and from PDF format
- PDF Editor: Basic PDF editing capabilities
- Color Picker: Pick colors and get hex/RGB values
- Color and Palette Extractor: Extract color palettes from images
- PO to Excel Converter: Convert purchase orders to Excel format
- Image Resizer & Converter: Resize and convert image formats
Games & Fun Tools
- Coin Flip Simulator: Virtual coin flipper
- Random Number Generator: Generate random numbers in custom ranges
- 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 from Image 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 in different currencies
- Transaction Decoder: Decode Ethereum transaction data and function calls
- Signature Verifier: Verify Ethereum signatures and recover signing addresses
DNS Tools (2 tools)
- DNS Lookup: Perform DNS lookups and view records
- WHOIS Lookup: Look up domain registration information
Utilities (9 tools)
- Unit Converter: Convert between length, weight, temperature, area, and volume 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
- 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
That's it. These sites offer hundreds of useful tools for everyday tasks, all without making you sign up or watch ads.
Crepi il lupo! 🐺