ToolGen - Free Online AI & Utility Tools

⚡ ToolGen

180+ Free Online Tools. No Registration. No Download.

All Tools AI Tools Image PDF & Docs Developer Utility

Agent Benchmark Suite

Benchmark AI agent performance across standard tests. Compare agents on coding, reasoning, and langu

AI Agent Blueprints

Proven AI agent blueprints: researcher, writer, coder, analyst, support. Copy and customize.

AI Agent Cost Optimizer

Optimize AI agent costs. Calculate and reduce LLM spending in agent workflows.

Agent Decision Tree Builder

Build decision trees for AI agents. Visualize branching logic and conditional agent responses.

AI Agent Evaluation Framework

Evaluate AI agent performance. Test and score agent quality, speed, and cost.

AI Agent Framework Comparison

Compare AutoGen vs CrewAI vs LangGraph vs LangChain vs Semantic Kernel. Which agent framework is bes

AI Agent Guardrails Builder

Build safety guardrails for AI agents. Content filters, output validators, and safety policies.

Agent Handover & Escalation Builder

Build AI agent handover workflows. Define escalation rules, human-in-the-loop, and fallback agents.

Agent Memory Architecture Designer

Design memory systems for AI agents. Short-term, long-term, episodic, semantic memory.

AI Agent Monitoring Dashboard

Generate monitoring dashboards for AI agents. Track costs, latency, errors, and task success rates.

Agent Orchestration Pipeline

Build AI agent orchestration pipelines. Sequence agents, define transitions, and generate workflow c

Agent Playbook Generator

Generate operational playbooks for AI agents. Define Standard Operating Procedures for agent workflo

AI Agent Task Router

Route tasks to the right AI agent. Intent classification, task routing, and queue management.

Agent Tool Registry Builder

Build a tool registry for AI agents. Define tools with JSON schemas, generate Python tool code.

AI Agent Workflow Visualizer

Visualize multi-agent AI workflows. See how AutoGen, CrewAI, and LangGraph agent systems work.

Agentic RAG Builder

Build RAG pipelines with agentic retrieval. Includes query decomposition, multi-hop reasoning, itera

AI Agent Audit Trail & Logging Designer

Design comprehensive logging for AI agents. Log decisions, tool calls, context windows, outputs, and

AI Agent Error Handling & Retry Planner

Plan error handling strategies for AI agents. Design retry logic, fallback chains, circuit breakers,

AI Agent Goal Decomposition Planner

Decompose complex user goals into executable sub-tasks. Design task hierarchies, dependencies, and e

AI Agent Memory Strategy Builder

Design agent memory systems: short-term context window, long-term episodic memory, semantic knowledg

AI Agent Output Validator & Quality Scorer

Validate and score AI agent outputs. Check factual accuracy, format compliance, safety violations, a

AI Agent Persona & Personality Designer

Design agent personas with distinct personalities. Define communication style, vocabulary, emotional

AI Agent Rate Limiter & Budget Controller

Design rate limiting and budget controls for AI agents. Plan token budgets, API call limits, cost tr

AI Agent Self-Correction Loop Builder

Build self-correction mechanisms for AI agents. Design feedback loops, self-verification steps, and

AI Model Comparison

Compare AI models: GPT-4o vs Claude 3.5 vs Gemini 1.5. See pricing, context length, capabilities.

AI Prompt Playground

Test and experiment with AI prompts. Interactive playground for ChatGPT, Claude-style prompts. Free.

AI Agent Terminology Guide

Essential AI agent terminology: RAG, RLHF, CoT, system prompt, few-shot, token, embedding. Learn AI

REST API Schema for AI Agents

Generate OpenAPI schemas that AI agents can use to call REST APIs.

Chain of Thought Logger

Log and visualize AI agent reasoning traces. Track thought chains, tool calls, and decisions.

Chain-of-Thought Prompt Builder

Build step-by-step reasoning prompts. Structure complex problem-solving into explicit reasoning step

Text Embedding Calculator

Calculate text embeddings and vector similarity. Estimate embedding dimensions and storage.

Few-Shot Example Selector for AI Prompts

Select optimal few-shot examples for AI prompts. Analyze example diversity, relevance, difficulty, a

Few-shot Example Generator

Generate few-shot examples for AI prompts. Create high-quality training examples for better LLM perf

AI Agent System Prompt Generator

Generate robust system prompts for AI agents. Includes role definition, behavior rules, output forma

Handoff Protocol Designer for AI Agents

Design seamless handoff protocols when AI agents transfer context. Define escalation paths, context

LLM Cost Calculator

Calculate LLM API costs for GPT-4o, Claude, Gemini, DeepSeek. Compare OpenAI, Anthropic, Google pric

LLM Router - Choose the Best Model

Find the best LLM for your task. Auto-recommend GPT-4o, Claude, Gemini based on cost, speed, and cap

Multi-Agent Communication Protocol Designer

Design communication protocols between agents. Define message formats, turn-taking rules, consensus

Multi-Agent Architecture Designer

Design multi-agent AI systems. Architect CrewAI, AutoGen, LangGraph agent teams.

Prompt Chaining Builder

Build multi-step AI prompt chains. Chain prompts together for complex workflows.

Prompt Injection Checker

Detect prompt injection attacks in AI prompts. Protect your agent systems from adversarial inputs.

AI Prompt Templates Library

Collection of proven AI prompts for ChatGPT, Claude, and Gemini. Copy and use instantly.

Prompt Version Control

Version control your AI prompts like code. Track experiments, compare results, and rollback.

RAG System Builder

Build a complete RAG pipeline. Generate code for retrieval, chunking, embedding, and vector search.

ReAct Pattern Builder

Build ReAct (Reason + Act) agents. Visual builder for thought-action-observation loops.

System Prompt Builder

Build effective system prompts for AI agents. Templates for Claude, GPT, and custom agents.

Count tokens for any text. Estimate OpenAI and Claude token usage for your prompts.

Tool-Use Schema Generator for AI Agents

Generate OpenAPI-style tool schemas that AI agents can understand. Define parameters, types, descrip

User Agent Parser

Parse and identify user agent strings. See browser, OS, and device info.

Image Background Remover

Remove background from images instantly for free. No registration required. Supports PNG, JPG.

Favicon Generator

Generate favicon from any image or emoji. Create .ico file for your website.

Create GIF from multiple images online. Adjust speed and download free.

Image Brightness/Contrast Adjuster

Adjust brightness, contrast, and saturation of images online. Free photo editor.

Image Compare Tool (Before/After)

Compare two images side by side with a slider. Before/After image comparison.

Image Compressor

Compress images online. Adjust quality and convert between JPG, PNG, WEBP. Free.

Image Compressor

Reduce image file size without losing quality. Free online image compressor.

Image Crop Tool

Crop images online for free. Select area and crop. Supports JPG, PNG, WEBP.

Image DPI / Print Size Calculator

Calculate print size and DPI for your images. Check if your photo is suitable for printing.

Apply artistic effects to photos. Sketch, cartoon, vintage, oil painting effects. Free.

Resize images to specific dimensions. Maintain aspect ratio or set exact size. Free online.

Resize images to any dimension online. Maintain aspect ratio or set custom size. Free.

Image Rotate & Flip Tool

Rotate and flip images online for free. Rotate 90°, 180°, flip horizontal, vertical.

Add Text to Image

Add text to images online. Create stamps, captions, and watermarks with custom fonts.

Image to Base64 Converter

Convert any image to Base64 string for embedding in HTML, CSS, or JSON. Free online tool.

Image to ICO Converter

Convert any image to ICO format for favicons and app icons. Free online ICO generator.

Image to PDF Converter

Convert images (JPG, PNG) to PDF online. Free, no registration required.

PDF to Images Converter

Convert PDF pages to images (JPG, PNG) online. Free PDF to image converter.

PDF to JPG Converter

Convert PDF pages to JPG images online for free. No registration, no watermarks.

Photo Grid Maker

Create beautiful photo grids online. Combine multiple images into stunning grid layouts. Free, no re

Photo Grid / Collage Maker

Create photo grids and collages online. Combine multiple images into a grid. Free.

PNG/JPG Converter

Convert images between PNG, JPG, WEBP formats instantly. Free online image converter.

Time Zone Converter

Convert time between time zones instantly. Free online time zone converter with current time in 20+

Timestamp Converter

Convert between Unix timestamp, UTC, and human-readable date. Free timestamp converter.

Image Watermark Tool

Add text or image watermark to your photos. Free online watermark tool.

YouTube Timestamp Link Generator

Generate YouTube video links with specific timestamps. Create links that start at any point. Free Yo

Merge multiple PDF files into one. Free online PDF merger tool.

Calculate your exact age in years, months, days. Free online age calculator with birthday countdown.

A股量化回测引擎 - 事件驱动回测

A股板块轮动分析 - 资金流向与板块强弱

A股市场微观结构分析 - 订单簿与博弈分析

Aspect Ratio Calculator

Calculate aspect ratio and resize images proportionally. Find missing dimension. Free online aspect

Base64 Encoder/Decoder

Encode and decode Base64 strings instantly. Free online Base64 encoder and decoder. Safe and private

Base64 Encoder/Decoder

Encode or decode Base64 strings online. Free Base64 tool.

Binary/Hex/Decimal Converter

Convert between binary, hex, decimal, and octal instantly. Free online number base converter for dev

Binary to Text Converter

Convert binary to text and text to binary instantly. Free online binary decoder.

Calculate your Body Mass Index (BMI) instantly. Free online BMI calculator with health category brea

Bold Text Generator

Generate bold text using Unicode. Transform any text to bold 𝐁𝐨𝐥𝐝 letters for social media bio and p

Character Counter

Count characters, words, and sentences in any text. Free online character counter with detailed stat

Color Converter (HEX, RGB, HSL)

Convert colors between HEX, RGB, and HSL formats instantly. Free color picker and converter.

Pick any color and get HEX, RGB, HSL values. Free online color picker with color codes for web desig

Compound Interest Calculator

Calculate compound interest and investment growth. Free online compound interest calculator for savi

Context Window Manager

Manage long AI conversations. Track context window usage, prevent token overflow.

Credit Card Validator

Validate credit card numbers instantly. Check card type (Visa, Mastercard, Amex). Free online credit

Cron Expression Generator

Generate cron job schedules visually. Build valid cron expressions with an easy point-and-click inte

Minify and compress CSS code instantly. Reduce CSS file size by up to 70%. Free online CSS minifier

Date Difference Calculator

Calculate days between two dates. Find date difference in days, weeks, months. Free online date diff

DNS lookup and WHOIS lookup for any domain. Find DNS records and domain information. Free online DNS

Duplicate Line Remover

Remove duplicate lines from text instantly. Sort and deduplicate text lines. Free online duplicate l

Email Validator

Validate email addresses instantly. Check email format and syntax. Free online email validator tool.

HTML Escape/Unescape

Escape or unescape HTML entities instantly. Convert special characters to HTML entities. Free online

Fake Data Generator

Generate fake data for testing: names, emails, addresses, phone numbers, dates. Free online fake dat

Fake Name Generator

Generate realistic fake names for testing, mockups, and privacy. 1000+ fake person names. Free onlin

LLM Fine-tuning Data Generator

Generate training data for fine-tuning AI models. Create instruction-response pairs from documents.

Calculate your GPA instantly. Free online GPA calculator for high school and college. Works with 4.0

CSS Gradient Generator

Create beautiful CSS gradients visually. Linear, radial, and conic gradients. Free online CSS gradie

CSS Gradient Generator

Generate beautiful CSS gradients. Linear, radial, and conic gradients.

Grammar Checker

Check and fix grammar errors instantly. Free online grammar checker for English text.

Hash Generator (MD5, SHA1, SHA256)

Generate MD5, SHA1, SHA256, and SHA512 hashes from any text. Free online hash generator for develope

Hashtag Generator

Generate trending hashtags for Instagram, TikTok, Twitter. Boost your posts with viral hashtags. Fre

HEX to RGB Color Converter

Convert HEX color codes to RGB and RGBA values instantly.

HTML Entities Reference

Complete HTML entities reference chart. Find © ® ™ and special characters.

HTML Escape/Unescape Tool

Escape or unescape HTML entities. Convert special characters to HTML entities and back.

HTML Formatter & Beautifier

Format, beautify and indent HTML code. Free online HTML formatter.

HTTP Header Checker

Check HTTP headers for any URL. See security headers, caching, content-type and more.

HTTP Status Codes Reference

Complete HTTP status codes reference guide. 200, 301, 404, 500 errors explained. Free online HTTP st

Invisible Character Embedder

Embed invisible zero-width characters in text. Detect and remove zero-width characters. Free online

Look up IP address location and details. Find IP geolocation, ISP, and hostname. Free online IP look

JSON Formatter & Validator

Format, validate, and minify JSON instantly. Paste your JSON and get beautifully formatted output. F

JSON to CSV Converter

Convert JSON data to CSV format instantly. Free online JSON to CSV converter.

JSON to CSV Converter

Convert JSON to CSV instantly. Transform JSON arrays to comma-separated values. Free online JSON to

JSON to XML Converter

Convert JSON to XML instantly. Transform JSON objects to XML format. Free online JSON to XML convert

JSON Tool Schema Generator for AI Agents

Generate JSON schema for AI agent tools. Create tool definitions for LangChain, CrewAI, AutoGen.

Validate and format JSON instantly. Check JSON syntax and pretty print. Free online JSON validator a

Decode and verify JWT tokens online. View header, payload, and signature. Free JWT decoder.

Keyword Density Checker

Check keyword density in your text or article. Free SEO tool for content optimization.

Line Break Remover

Remove line breaks from text instantly. Convert multi-line text to single line. Free online line bre

Lines to Words Converter

Convert lines of text to individual words. Extract words from text lines. Free online word extractio

Loan EMI Calculator

Calculate monthly loan EMI instantly. Free online loan calculator for mortgage, car loan, personal l

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text instantly. Customizable paragraphs, sentences, and word count.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text instantly. Customizable paragraphs, words, and bytes.

Markdown Preview

Preview Markdown in real-time. Write Markdown and see live preview. Free online Markdown editor and

Meta Tag Generator

Generate SEO meta tags for any website. Title, description, keywords, Open Graph tags. Free online m

Meta Tag Preview (SERP)

Preview how your page will look in Google search results. See SERP snippet before publishing.

Morse Code Translator

Convert text to Morse code and vice versa. Free online Morse code translator. Encode and decode Mors

Number to Words Converter

Convert numbers to words. Perfect for writing checks, legal documents, and invoices. Free online num

SSL Certificate Info

Check SSL certificate information for any website. View certificate details.

Paraphrasing Tool

Paraphrase and rewrite text instantly. Free online paraphrasing tool with multiple modes.

Password Generator

Generate strong, secure passwords instantly for free. Customize length and character types. No regis

Password Strength Checker

Check password strength instantly. Test if your password is weak, medium, or strong. Free online pas

Password Strength Checker

Check password strength instantly. See how secure your password is.

Percentage Calculator

Calculate percentages instantly. Find percentage increase, decrease, and discount. Free online perce

Percentage Change Calculator

Calculate percentage increase or decrease between two numbers. Free online percentage change calcula

Plagiarism Checker

Check your text for plagiarism online for free. Instant results with detailed similarity reports. No

Punctuation Checker

Check and fix punctuation in your text. Free online punctuation checker and fixer.

QR Code Decoder

Decode QR codes from images. Read and extract data from QR code images. Free online QR decoder.

QR Code Generator

Generate QR codes instantly. Create QR codes for URLs, text, WiFi, contacts. Free online QR code gen

Random Number Generator

Generate random numbers instantly. Pick random numbers for lotteries, giveaways, contests. Free onli

Random Password Generator

Generate secure random passwords. Customizable length and character types.

Test and debug regular expressions online. Supports JavaScript. Instant matches, real-time highlight

RGB to HEX Color Converter

Convert RGB to HEX and HEX to RGB instantly. Pick any color and get both formats with live preview.

RGB/Hex Color Converter

Convert between RGB and HEX color values instantly. Free online RGB to Hex and Hex to RGB color conv

robots.txt Generator

Generate robots.txt file for your website. Control search engine crawler access.

Roman Numeral Converter

Convert between Roman numerals and numbers instantly. Free online Roman numeral converter. Perfect f

Sentence Counter

Count sentences, words, and paragraphs in any text. Free online sentence counter tool with detailed

Generate URL slugs from any text. Create SEO-friendly URL slugs. Free online slug generator.

Small Text Generator

Convert text to small Unicode letters. Generate tiny ᵗⁱⁿʸ text for social media bios and posts. Free

Format and beautify SQL queries instantly. Supports MySQL, PostgreSQL, SQL Server and more.

Convert text between different cases: lowercase, UPPERCASE, Title Case, Sentence case. Free online c

Text Diff Checker

Compare two texts and find differences. Highlight additions, deletions, and changes. Free online tex

Text to List Converter

Convert comma-separated text to a list. Split text into individual items. Free online text to list c

Text to Slug Converter

Convert any text to URL-friendly slug. Perfect for SEO-friendly URLs and permalinks.

Calculate tips and split bills instantly. Free online tip calculator for restaurants, bars, and serv

Tool Calling Simulator for AI Agents

Simulate AI agent tool calling. Test function calls, see tool definitions, trace agent decisions.

Length Converter

Convert length units instantly. Meters, feet, inches, kilometers, miles, yards. Free online length u

Weight Unit Converter

Convert between weight units: kilograms, pounds, ounces, grams, stones.

Free online unit converter. Convert length, weight, temperature, area, volume and more. No registrat

Upside Down Text Generator

Flip text upside down. Generate ʇxǝʇ uʍop ǝpısdn text for social media. Free online upside down text

URL Encoder/Decoder

Encode or decode URL strings instantly. Convert special characters to percent-encoding. Free URL enc

URL Encoder/Decoder

Encode and decode URLs instantly. Free online URL encoder and decoder. Convert special characters fo

Parse and analyze URL components. Extract protocol, host, path, query params, and more.

UUID Generator v4

Generate UUID v4 (random) instantly. Free UUID generator for developers. Create unique identifiers f

Generate UUIDs (v4) instantly. One-click copy. Free UUID generator for developers. No registration r

WHOIS lookup for any domain name. Find domain registration details, expiry, owner. Free online WHOIS

WireGuard Config Generator

Generate WireGuard VPN configuration files. Free WireGuard config generator.

Count words, characters, sentences, and paragraphs instantly. Paste your text for detailed statistic

Word Frequency Counter

Count word frequency in any text. Find most common words. Free online word frequency analyzer for SE

Word Unscrambler

Unscramble letters to form words. Free online word unscrambler for Scrabble, Wordle, and word games.

YAML to JSON Converter

Convert YAML to JSON and JSON to YAML instantly. Free online YAML to JSON converter.

Validate and format YAML online. Check YAML syntax, find errors, and format with proper indentation.

YouTube Thumbnail Downloader

Download YouTube video thumbnails in HD quality. Get thumbnail images for any YouTube video. Free on

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