Your Digital Toolbox
A collection of powerful, easy-to-use tools for mathematics, text manipulation, color adjustments, and more. All free, no sign-up required.
Mathematics
Powerful calculators and mathematical tools for everyday calculations
GPA Calculator
Calculate your Grade Point Average (GPA) easily with customizable grading scales
Area Calculator
Calculate areas of various geometric shapes including circles, rectangles, triangles, and more
Unit Converter
Convert between length, area, volume, mass, temperature, time, speed, energy, power, data, and more
Calculator
A full-featured scientific calculator for complex mathematical operations
Probability Calculator
Calculate probabilities for various statistical distributions and events
Percentage Calculator
Comprehensive percentage calculator covering discounts, tips, conversions, and goal tracking
Standard Deviation Calculator
Calculate standard deviation and variance for statistical analysis
Fraction Calculator
Advanced fraction calculator with operations, simplification, conversion, and step-by-step solutions
Equation Solver
Comprehensive equation solver for linear, quadratic, cubic, systems of equations, and more with step-by-step solutions
SEO
Optimize search presence with generators for metadata, robots rules, and more
Canonical URL Checker
Check if a webpage has a valid canonical tag to prevent duplicate content issues
Heading Analyzer
Analyze the heading structure (H1-H6) of any webpage for SEO best practices
Hreflang Tag Generator
Generate correct hreflang tags for multi-language and multi-regional websites
Schema Markup Generator
Create JSON-LD structured data markup for articles, products, events, and more
SERP Preview Tool
Preview how your webpage will look in Google search results on desktop and mobile
XML Sitemap Generator
Generate XML sitemaps for your website to help search engines crawl your pages
Structured Data Validator
Validate your schema markup and structured data for errors and warnings
Meta Tag Generator
Generate SEO, Open Graph, Twitter, verification, and structured data meta tags with live previews and exports
robots.txt Generator
Create advanced robots.txt files with multiple user-agents, sitemap management, presets, and diagnostics
Open Graph Generator
Generate Open Graph meta tags for optimal social media sharing on Facebook, Twitter, LinkedIn, and other platforms
Text Tools
Manipulate and transform text with our comprehensive text utilities
Text Case Converter
Convert text between uppercase, lowercase, title case, camelCase, and more
Email Extractor
Extract email addresses from large blocks of text effortlessly
Emoji Picker
Browse, search, and copy emojis from a complete collection
QR Code Generator
Generate QR codes for URLs, text, contact info, WiFi, and more
Invisible Character Detector
Find and remove invisible characters, zero-width spaces, and hidden controls
Add Line Numbers
Add line numbers to your text or code snippets automatically
Lorem Ipsum Generator
Generate placeholder text for designs with custom paragraph, word, or character counts
Morse Code Translator
Translate text to Morse code and Morse code to text instantly
Punycode Converter
Convert international domain names (IDN) to Punycode and back
URL Slug Generator
Convert text into SEO-friendly URL slugs automatically
Developer
Developer-friendly utilities for code formatting, conversion, and analysis
Chmod Calculator
Calculate Linux file permission codes (chmod) visually or by number
Color Contrast Checker
Check color contrast ratios for accessibility compliance (WCAG AA & AAA)
Crontab Generator
Build and test cron job schedules with a visual interface
Diff Checker
Compare text, code, or files side-by-side to find differences
DNS Lookup
Check DNS records (A, AAAA, MX, NS, TXT, SOA) for any domain
.env Generator
Generate secure .env files for your projects with best practices
Favicon Generator
Create favicons for all platforms (Web, iOS, Android) from text or image
HTML Entity Encoder
Encode and decode HTML entities to prevent XSS and ensure proper rendering
HTTP Status Codes
Complete list of HTTP status codes with explanations and troubleshooting
IP Address Lookup
Find geolocation and network details for any IP address
Color Tools
Work with colors - adjust brightness, convert formats, and create palettes
Color Blindness Simulator
Simulate how your designs look to people with different types of color blindness
CSS Filter Generator
Generate CSS filter effects like blur, brightness, contrast, and more visually
Glassmorphism Generator
Create trendy glassmorphism UI effects with blur and transparency
Image Color Extractor
Extract dominant colors and generate a color palette from any image
Neumorphism Generator
Generate soft UI (Neumorphism) CSS shadows and shapes
Tailwind Color Generator
Generate comprehensive Tailwind CSS color shades from a single base color
Lighten Color
Make colors lighter by adjusting their brightness and luminosity
Darken Color
Make colors darker by reducing their brightness and luminosity
CSS Gradient Generator
Create beautiful CSS gradients with advanced controls for linear, radial, and conic gradients. Real-time preview and export options.
Box Shadow Generator
Generate stunning CSS box shadows with live preview, multiple layers, presets, and export options for web design
DateTime
Calculate time differences, convert time zones, and manage dates and times
Business Days Calculator
Calculate working days between dates excluding weekends and public holidays
Pomodoro Timer
Boost productivity with a customizable Pomodoro timer for work and breaks
Online Stopwatch
Precise online stopwatch with lap times and split timing capabilities
Batch Timestamp Converter
Convert multiple Unix timestamps to human-readable dates simultaneously
Week Number Calculator
Check the current week number or find the week number for any date
World Clock
View current time in multiple cities and time zones around the world
Timestamp Converter
Convert between UNIX timestamps and readable dates with timezone-aware conversions, batch processing, and natural language parsing
Time Zone Converter
Convert time between multiple time zones with ease and precision
Countdown Timer
Create countdown timers for events, deadlines, and time-sensitive tasks
Age Calculator
Calculate your exact age in years, months, days, and more
Finance
Financial calculators for loans, investments, and money management
EMI Calculator
Calculate Equated Monthly Installments for loans and mortgages
Loan Calculator
Calculate loan payments, interest, and amortization schedules
Mortgage Calculator
Calculate mortgage payments and compare different loan options
Salary Calculator
Calculate take-home pay, taxes, and deductions from your salary
Salary Calculator (India)
Calculate take-home pay with Indian tax rules and deductions
Interest Calculator
Calculate simple and compound interest for savings and investments
Invoice Generator
Create professional invoices with customizable templates, tax calculations, multiple currencies, and export options
Bill Splitter
Split bills and expenses among multiple people with custom shares, taxes, and tip calculations
Health
Understand your body better with calculators and planners built to support everyday health decisions confidently.
BMI Calculator
Analyse BMI, waist ratios, metabolic rates, goals, and history in one comprehensive dashboard
Calorie Calculator
Estimate calorie needs, macros, hydration, and meal timing with evidence-based recommendations
Macro Calculator
Calculate your daily macronutrient needs based on your goals and activity level.
Image
Professional image processing tools for editing, optimizing, and transforming images
Image Resizer
Resize images with multiple fit options (cover, contain, fill) and format conversion
Image Cropper
Crop images with precise pixel control and custom dimensions
Image Rotator
Rotate images by any angle with automatic background handling
Image Flipper
Flip images horizontally or vertically with instant preview
Thumbnail Generator
Generate optimized thumbnails with smart resizing and format options
Format Converter
Convert images between JPG, PNG, WebP, and other formats
Image Info
Get detailed information about image dimensions, format, and metadata
Image Optimizer
Optimize images for web with quality control and size reduction
Blur Effect
Apply Gaussian blur effect with adjustable intensity
Sharpen Effect
Sharpen images to enhance details and clarity
Converter
Convert CSV data to various formats including programming languages, markup, databases, and images
CSV to ActionScript
Convert CSV data to ActionScript arrays and objects
CSV to ASCII
Convert CSV to ASCII table format with borders and alignment
CSV to AsciiDoc
Convert CSV to AsciiDoc table markup
CSV to ASP
Convert CSV data to ASP arrays and recordsets
CSV to Avro
Convert CSV to Apache Avro schema and data format
CSV to BBCode
Convert CSV to BBCode table format for forums
CSV to CSV
Reformat CSV with custom delimiters, quotes, and options
CSV to DAX
Convert CSV to DAX table expressions for Power BI
CSV to Excel
Convert CSV to Excel XLSX format with formatting
CSV to Firebase
Convert CSV to Firebase Realtime Database JSON structure
Comprehensive PDF tools for viewing, editing, security, and page manipulation
PDF Info
Extract metadata and information from PDF files including page count, author, and creation date
Extract Text
Extract text content from PDF files for analysis and processing
Merge PDFs
Combine multiple PDF files into a single document
Split PDF
Extract specific page ranges from PDF files
Encrypt PDF
Add password protection to secure your PDF files
Add Watermark
Add text watermarks to all pages of your PDF
Rotate PDF
Rotate all pages in your PDF by 90 degrees clockwise
Delete Pages
Remove specific pages from your PDF document
Reorder Pages
Change the order of pages in your PDF document
Redact Content
Draw black rectangles over sensitive areas in your PDF
AI Analytics
Analyze and optimize your AI usage and performance
A/B Test Planner
Calculate sample size and duration for AI model A/B tests
Latency Estimator
Estimate and compare latency across different LLM providers and models
AI ROI Calculator
Calculate ROI for implementing AI solutions vs human labor costs
AI Spend Dashboard Template
Visualize and track AI API usage and costs across providers
Token Usage Tracker
Track token consumption and estimate costs for various LLM interactions
Learn AI
Educational resources and guides for AI mastery
AI Acronym Decoder
Look up common AI/ML acronyms like RLHF, RAG, LoRA, and more
AI Ethics Checklist
Interactive checklist for responsible AI development and deployment
AI Glossary
Comprehensive definitions of artificial intelligence and machine learning terms
ML Model Selection Flowchart
Interactive guide to choosing the right machine learning algorithm for your problem
Model Card Generator
Generate standard model cards for documenting your machine learning models
Neural Network Visualizer
Interactive visualization of basic neural network architectures and layers
TL;DR Paper Summaries
Key takeaways from seminal AI research papers (Attention Is All You Need, etc.)
AI Use Case Finder
Discover potential AI applications for your specific industry or problem
AI Models
Explore and compare different AI models
LLM Benchmark Library
Compare LLM performance across standard benchmarks like MMLU, GSM8K, and HumanEval
Model Capability Matrix
Compare feature support (vision, function calling, json mode) across major LLMs
LLM Head-to-Head
Directly compare two models on specs, pricing, and capabilities side-by-side
Context Window Visualizer
Visual comparison of context window sizes across different models
AI Model Pricing Tracker
Up-to-date pricing table for input/output tokens across all major providers
AI System Status Board
Aggregated status page for OpenAI, Anthropic, Google, and other AI services
AI Model Release Timeline
Interactive timeline of major LLM and generative AI model releases
AI Prompts
Craft and optimize prompts for better AI results
AI Prompt Builder
Build effective prompts for ChatGPT, Claude, and other AI models using templates and the CRAF framework
Chain of Thought Builder
Design effective Chain of Thought (CoT) prompting sequences
Prompt Version Diff
Compare two versions of a prompt to spot changes and improvements
Few-Shot Example Generator
Create and format few-shot examples (user/assistant pairs) for context
Prompt Formatter
Clean up, strip whitespace, and structure prompts for production
Prompt Injection Simulator
Test your system prompts against common injection attacks
Persona & Role Generator
Generate detailed system prompt personas (e.g., "Senior Python Engineer")
System Prompt Architect
Component-based builder for robust system instructions and guardrails
System Prompt Library
Collection of leaked and open-source system prompts from major AI products
Prompt Version Manager
Simple tool to track changes and results across prompt iterations
AI Safety
Ensure your AI systems are safe and secure
Text Bias Detector
Analyze text for potential gender, racial, or political bias
Content Moderation Test
Check text against standard moderation categories (hate, violence, self-harm)
Guardrails Configuration
Generate configuration for AI guardrails libraries (NeMo, Guardrails AI)
Hallucination Risk Estimator
Estimate hallucination risk based on prompt characteristics and topic
Prompt Injection Detector
Scan user input for known jailbreak patterns and injection attempts
Jailbreak Pattern Library
Database of known jailbreak techniques for red-teaming your models
Output Validator
Define and test regular expression or logic checks for model outputs
Technical AI
Deep dive into the technical details of AI
Attention Mechanism Demo
Interactive visualizer of how self-attention works in transformers
BLEU Score Calculator
Calculate BLEU score for machine translation evaluation
Cosine Similarity Calc
Calculate similarity between two vectors or text embeddings
Embedding 3D Visualizer
Visualize high-dimensional embeddings in 2D/3D using PCA/t-SNE simulation
Perplexity Explainer
Calculate and understand perplexity from probability distributions
ROUGE Score Calculator
Calculate ROUGE-N and ROUGE-L scores for summarization tasks
Temperature Visualizer
Visualise how temperature and top-p sampling affect next-token probabilities
Tokenization Visualizer
See how text is broken down into tokens by different tokenizers (BPE, WordPiece)
Nucleus Sampling (Top-p) Demo
Interactive demo explaining how Nucleus Sampling filters token selection
Vector Dimension Guide
Reference for default embedding dimensions of popular models (OpenAI, Cohere, etc.)
AI Tokens
Manage and calculate token usage and costs
AI Token Counter
Count tokens and estimate API costs for GPT-4, Claude, Gemini, Llama and other AI models with real-time pricing
AI Cost Calculator
Calculate and compare API costs for GPT-4, Claude, Gemini and other AI models with batch and comparison modes
AI Pricing Comparison
Compare pricing across 100+ AI models including GPT-4, Claude, Gemini, and Llama with filtering and sorting
Batch Cost Estimator
Estimate costs for large batch processing jobs across providers
Context Window Calculator
Calculate if your text fits within specific model context windows
Embedding Cost Calculator
Calculate the cost of generating embeddings for a dataset
Fine-Tuning Cost Calculator
Estimate the cost of fine-tuning models on your custom dataset
Image Generaton Cost Calc
Calculate costs for generating images with DALL-E 3, Midjourney, etc.
AI Workflow
Streamline your AI development workflow
AI Agent Workflow Planner
Design multi-step agent workflows and loop structures
RAG Chunking Calculator
Visualize how different chunk sizes and overlaps affect text splitting
AI Architecture Diagrammer
Create system architecture diagrams for LLM applications (RAG, Agents)
LLM Integration Checklist
Checklist for deploying LLMs into production (Caching, Logging, Eval)
LangChain Chain Builder
Visual builder to prototype LangChain sequences and prompts
Chunk Overlap Optimizer
Determine optimal overlap percentage to maintain context between chunks
RAG Pipeline Planner
Plan your RAG architecture: Embeddings, Vector DB, and Retrieval method
Vector DB Sizing Calculator
Estimate memory and storage requirements for vector databases (Pinecone, Milvus, etc.)
AI API
Tools for working with AI APIs and integrations
Anthropic API Builder
Build and test Anthropic Claude API requests with proper formatting
API Key Validator
Validate format and checksum of API keys (OpenAI, Anthropic, etc.) client-side
Function Calling Schema Builder
Build JSON schemas for OpenAI function calling and tool use
OpenAI API Builder
Construct OpenAI API requests visually and export code in multiple languages
Rate Limit Calculator
Calculate allowed requests and tokens per minute based on tier limits
AI Response Parser
Parse and visualize complex JSON responses from LLM APIs
Retry Strategy Generator
Generate exponential backoff and retry logic code for robust API calls
Streaming Response Simulator
Simulate and test UI handling of streaming LLM responses (SSE)
Tool Definition Generator
Generate standardized tool definitions for AI agents from code
AI Data
Prepare and manage data for AI training and fine-tuning
Annotation Converter
Convert between different data annotation formats (COCO, YOLO, Pascal VOC)
Data Augmentation Preview
Visualize image augmentation techniques for training data
Chat Data Formatter
Convert chat logs between ShareGPT, OpenAI, and Alpaca formats
Dataset Splitter
Split datasets into train, validation, and test sets with stratification
JSONL Converter
Convert between JSON and JSONL formats for fine-tuning comparisons
PII Detector
Identify and redact Personally Identifiable Information in datasets client-side
Synthetic Data Generator
Generate synthetic examples based on schema instructions
Training Data Formatter
Format text for various training objectives (Fill-in-middle, Next Token)
AI Eval
Evaluate and benchmark AI model performance
Model A/B Test Evaluator
Analyze results from model A/B tests for statistical significance
BLEU & ROUGE Calculator
Calculate standard text generation metrics between reference and hypothesis
Confusion Matrix Visualizer
Generate and analyze confusion matrices for classification models
Evaluation Harness Config
Generate configuration files for LM Evaluation Harness
Human Eval Form
Create grading rubrics and forms for human evaluation of LLM outputs
Latency Benchmark Recorder
Record and visualize latency metrics from your own API tests
AI Images
Tools for generating and editing AI images
Aspect Ratio Calculator
Calculate dimensions and verify aspect ratios for Midjourney, DALL-E, and Stable Diffusion
DALL-E 3 Prompt Builder
Create detailed natural language prompts optimized for DALL-E 3
Midjourney Prompt Generator
Construct complex Midjourney prompts with parameters for version, aspect ratio, and style
Negative Prompt Generator
Generate comprehensive negative prompts to remove defects and unwanted elements
AI Pose Directory
Browse and discover prompt keywords for character poses and camera angles
Prompt Enhancer
Expand simple ideas into detailed, descriptive prompts for better image generation
Prompt Weight Calculator
Calculate and format attention weights for Stable Diffusion (()) and Midjourney (::)
AI Resolution Guide
Reference guide for optimal resolutions and upscaling factors
Stable Diffusion Prompt Builder
Build prompts with support for LoRAs, embeddings, and common checkpoint styles
AI Art Style Reference
Visual library of artist styles, mediums, and lighting modifiers
Fun
Collection of Fun tools
Barcode Generator
Generate custom barcodes in various formats including CODE128, EAN, UPC, and more
Coin Flip
Flip a virtual coin to make fair decisions instantly
Countdown Widget
Create custom countdown timers for events, deadlines, or daily tasks
Dice Roller
Roll virtual dice for board games, D&D, or random number generation
Random Name Picker
Pick a random winner or name from a list fairly and transparently
Wheel Spinner
Spin a customizable wheel to make random decisions or pick winners
AI Tools
Complete collection of AI tools
AI API
Tools for working with AI APIs and integrations
AI Data
Prepare and manage data for AI training and fine-tuning
AI Eval
Evaluate and benchmark AI model performance
AI Images
Tools for generating and editing AI images
AI Analytics
Analyze and optimize your AI usage and performance
Learn AI
Educational resources and guides for AI mastery
AI Models
Explore and compare different AI models
AI Prompts
Craft and optimize prompts for better AI results
AI Safety
Ensure your AI systems are safe and secure
Technical AI
Deep dive into the technical details of AI
More Tools Coming Soon
We're constantly adding new tools to help you work smarter and faster. Check back regularly for updates!