AI-Powered Tools

• AI Grammar Checker: Check and correct grammar in your text with AI, showing detailed changes.
• AI Translator: Translate text between various languages using advanced AI models.
• AI Logo Creator: Generate branded logo concepts with AI image generation, multiple styles, and downloadable variations.
• AI Content Summarizer: Summarize long articles, documents, or research papers into concise, accurate summaries of varying lengths.
• AI Email Composer: Generate professional emails based on brief descriptions of intent with customizable tone and length.
• AI Audio Transcriber: Professional audio transcription powered by AssemblyAI. Fast, accurate, supports 99+ languages. Export as TXT or JSON with timestamps.
• AI Code Explainer & Optimizer: Get plain-language explanations of code snippets and suggestions for optimization.
• AI Legal Document Analyzer: Analyze contracts, terms of service, or legal documents to highlight important clauses, potential issues, and explain legal jargon in plain language.
• AI Research Assistant: Get a curated collection of key facts, arguments, counterarguments, and sources on any research topic.
• AI Job Description Generator: Create professional job descriptions with AI assistance. Customize details and save for later use.
• AI HR Match Analyzer: AI-powered tool to analyze and match resumes with job descriptions for HR professionals.
• AI SEO Audit Tool: Comprehensive SEO analysis tool to audit websites for search engine optimization issues and improvements.
• AI Contract Generator: Generate professional legal contracts with AI assistance. Multi-step wizard for NDAs, employment agreements, service contracts, and more.
• AI Dork Builder: Build powerful search dorks with 7000+ prebuilt queries, visual mix & match builder, and AI-powered generation. 14 categories for security research.
• AI CVE Explorer: Search and analyze CVEs with EPSS exploitation scores, CISA KEV alerts, CVSS metrics, and AI-powered explanations. Track vulnerabilities with a watchlist.
• AI SQL Query Generator: Generate, explain, and optimize SQL queries from natural language and schema descriptions. Supports multiple dialects and visual building.

Text & Document

• Text Formatter: Format and manipulate text with various options like case conversion, sorting, and more.
• Markdown Editor: Create and edit Markdown documents with live preview, syntax highlighting, and export options.
• Lorem Ipsum Generator: Generate placeholder text in various formats with customizable length and formatting options.
• Text Diff Tool: Compare two texts and visualize the differences. Perfect for code reviews or tracking document changes.
• List Converter: Convert lists between different formats and delimiters.
• Text Statistics: Analyze text for word count, character count, and other metrics.
• Emoji Picker: Easily find and copy emojis to use in your texts.
• ASCII Art Generator: Convert images or text into ASCII art.
• Text to PDF Converter: Quickly convert plain text into a downloadable PDF document.

Code & Development

• Pastebin: Share code and text with syntax highlighting, multiple visibility levels, search, and persistent storage.
• AI Code Explainer & Optimizer: Get plain-language explanations of code snippets and suggestions for optimization.
• Code Formatter: Format and beautify code in various programming languages with syntax highlighting and specialized JSON features.
• JSON Formatter & Validator: Format, validate JSON data, and optionally validate against a JSON schema.
• RegEx Tester: Test and debug regular expressions with real-time highlighting and detailed match information.
• Cron Expression Generator: Create and understand cron expressions for scheduling tasks with a user-friendly interface.
• Chmod Calculator: Visually calculate and understand Unix/Linux file permissions (octal and symbolic).
• SQL Formatter: Beautify and format your SQL queries with various dialect options for better readability.
• CSS Unit Converter: Convert between various CSS units (px, em, rem, vw, vh, etc.) with contextual inputs.
• Git Cheatsheet: Quick reference for common Git commands and workflows.
• Docker Run to Compose: Convert Docker run commands to Docker Compose file format.
• Benchmark Builder: Create and run JavaScript benchmarks to compare code performance.
• CURL to Code Converter: Convert curl commands to fetch, axios, Python, Go, Java, PHP, Ruby, Rust, and C#. Instant code generation for HTTP requests.

JWT Tools

• JWT Parser: Decode and inspect JSON Web Tokens (JWT).
• JWT Verifier: Verify the signature of JSON Web Tokens (JWT) using secret or public keys.
• JWT Builder: Create and sign JSON Web Tokens with various algorithms.
• JWKS Inspector: Fetch and inspect JSON Web Key Sets (JWKS) from public endpoints.

Encoding & Conversion

• Unit Converter: Convert between different units of measurement including length, weight, temperature, and more.
• Color Converter: Convert between color formats (HEX, RGB, HSL) with visual preview and color palette generation.
• Base64 Tool: Encode and decode Base64 data with support for text, images, and files.
• Encoder/Decoder: Encode and decode text in various formats including Base64, URL encoding, HTML entities, and more.
• HTML Entity: Convert between HTML entities and their corresponding characters with real-time preview.
• Number System Converter: Convert numbers between binary, octal, decimal, and hexadecimal systems.
• Date-Time Converter: Convert dates and times between different formats and timezones.
• Roman Numeral Converter: Convert numbers to and from Roman numerals.
• JSON Data Converter: Convert JSON data to other formats like XML, YAML, etc.
• Unix Timestamp Tool: Convert between Unix timestamps and human-readable dates. Support for multiple formats, timezones, and live clock display.
• Meeting Timezone Planner: Find optimal meeting times across multiple timezones. Visualize working hours overlap and generate shareable meeting details.

Security & Cryptography

• Hash Generator: Generate various hash types (MD5, SHA-1, SHA-256, etc.) for text input with comparison functionality.
• Secure Password Generator: Create strong, secure passwords with customizable options and strength analysis.
• QR Code Generator: Create customized QR codes with colors, logos, and styling options for any URL or text.
• HMAC Generator: Generate HMAC (Hash-based Message Authentication Code) using various hash algorithms and a secret key.
• PGP Tool: Encrypt and decrypt messages using PGP (OpenPGP.js) with provided keys.
• Key Pair Generator (PGP): Generate new PGP (RSA or ECC) key pairs, optionally protected by a passphrase.
• SSH Key Generator: Generate RSA SSH key pairs (public key in OpenSSH format) client-side.
• Bcrypt Tool: Generate and verify Bcrypt hashes for password security.
• Password Strength Analyser: Analyze the strength of your passwords.
• Certificate Toolkit (PEM/CSR): Paste certificate, private key, CSR, and OpenSSL cnf to validate locally; generate RSA keys, CSRs, and self‑signed certs in browser.
• OTP Code Generator: Generate Time-based One-Time Passwords (TOTP).
• Secret Note Sharer: Create and share one-time readable, password-protected, encrypted notes with optional email notifications when viewed.

Security Research & OSINT

• Steganography Studio: Analyze images for hidden data. Visualize bit planes, extract strings, and inspect hex dumps securely in your browser.
• IOC Defanger: Safely format and defang malicious URLs and IP addresses for reporting. Convert http to hxxp and more.
• Hash Identifier: Identify unknown hash strings. Detects MD5, SHA-1, SHA-256, Bcrypt, and many other hash algorithms based on format and length.
• Email Permutator: Generate common corporate email address formats from a name and domain. Useful for OSINT investigations and sales prospecting.
• Homoglyph Generator: Generate look-alike domains using ASCII substitution, Unicode homoglyphs, and common typos. Useful for phishing research and defensive monitoring.
• Punycode/IDN Analyzer: Detect IDN homograph attacks and analyze domain security. Convert between Unicode and Punycode with character breakdown, risk scoring, and 200+ attack patterns library.
• Unicode Studio: All-in-one Unicode security toolkit: Detect Trojan Source attacks, build test strings with special characters, explore 70+ attack patterns, and sanitize dangerous Unicode. 4 tools in 1.
• HTTP Header Grader: Analyze HTTP response headers for security best practices. Check for HSTS, CSP, X-Frame-Options, and more to get a security grade.
• Payload Vending Machine: Interactive cheatsheet for pentesters. Copy common SQLi, XSS, RCE, and other payloads with a single click.
• AI CVE Explorer: Search and analyze CVEs with EPSS exploitation scores, CISA KEV alerts, CVSS metrics, and AI-powered explanations. Track vulnerabilities with a watchlist.
• AI Dork Builder: Build powerful search dorks with 7000+ prebuilt queries, visual mix & match builder, and AI-powered generation. 14 categories for security research.
• Username Recon: Check if a username is taken across popular platforms like GitHub, GitLab, Reddit, and more.
• Shodan Query Builder: Build and discover Shodan, Censys, ZoomEye queries with 600+ pre-built IoT/ICS security research queries. Visual builder with drag-and-drop operators.

Identity & Generators

• UUIDs Generator: Generate universally unique identifiers (UUIDs).
• ULID Generator: Generate universally unique lexicographically sortable identifiers (ULIDs).
• BIP39 Generator: Generate BIP39 mnemonic phrases for crypto wallets.

Blockchain & Crypto

• Crypto Wallet Generator: Generate cryptocurrency wallets for various blockchains with private keys and mnemonic phrases.
• Crypto Price Tracker: Track cryptocurrency prices in real-time with historical charts and market data.
• Crypto Calculator: Calculate conversions between different cryptocurrencies and fiat.
• Crypto Tax Calculator: Calculate capital gains tax, import transaction history, and generate tax reports for cryptocurrency investments.
• Gas Fee Estimator: Estimate gas fees for Ethereum and other blockchain transactions with real-time network data.
• DeFi Calculator: Calculate yields, APYs, impermanent loss, and other DeFi metrics for better investment decisions.
• Blockchain Explorer: Explore blockchain transactions, check address balances, and interact with smart contracts across multiple networks.
• NFT Toolkit: Create, analyze, and manage NFTs with tools for metadata generation, rarity checking, and collection exploration.

Financial Tools

• Investment Calculator: Calculate ROI, visualize compound interest, and simulate dollar-cost averaging for various investment strategies.
• Portfolio Tracker: Manage multi-asset portfolios, visualize performance, and analyze diversification across different investments.
• Loan Calculator: Calculate mortgage and auto loan payments, generate amortization schedules, and plan early payoff strategies.
• Expense Tracker: Manage monthly budgets, categorize expenses, and visualize savings goals with interactive charts.
• Forex Converter: Convert between currencies with real-time exchange rates, view historical charts, and analyze correlations.
• Stock Option Calculator: Calculate option prices, visualize profit/loss scenarios, and analyze option Greeks for better trading decisions.
• Tip Calculator: Easily calculate tips and split bills for dining out.
• Credit Card Validator: Validate credit card numbers using the Luhn algorithm and detect card type.

Math & Calculators

• Math Evaluator: Evaluate mathematical expressions with support for variables and functions.
• ETA Calculator: Calculate Estimated Time of Arrival based on speed and distance.
• Percentage Calculator: Calculate percentages, percentage change, and more.
• Water Temperature Calculator: Calculate the right mix of hot and cold water to achieve a specific target temperature.
• Fertilizer/Plant Nutrient Mixer: A tool to calculate the correct mix of nutrients for plants.

Networking & DNS

• CIDR Calculator: Calculate network ranges, subnet masks, and available hosts from CIDR notation.
• URL Parser & Builder: Break down URLs into components, analyze query strings, and rebuild URLs.
• MAC Address Lookup: Identify the vendor of a network device by its MAC address using an OUI database.
• Common Ports List: Browse and search a list of common network ports and their associated services.
• IPv4 Converter: Convert IPv4 addresses between decimal, binary, and hexadecimal formats.
• IPv4 Range Expander: Expand CIDR notation or IP ranges into a list of individual IP addresses.
• IPv6 ULA Generator: Generate Unique Local Addresses (ULA) for IPv6 networks.
• DNS Toolbox: Perform DNS lookups for A, AAAA, CNAME, TXT, MX records and parse SPF/DMARC records.
• SSL/TLS Checker: Inspect SSL/TLS certificates, chain, expiry, supported protocols and cipher suites for a host.
• What's My IP?: Find your public IP address and geolocation information including country, city, ISP, and more.
• GeoIP Lookup: Lookup geolocation information for any IP address. Find location, ISP, and other geographic data for IPv4 and IPv6 addresses.

Web Development

• Device Information: View information about your current device and browser.
• Basic Auth Generator: Generate Basic Authentication headers for HTTP requests.
• Open Graph Generator: Generate Open Graph meta tags for social media sharing.
• MIME Types: Browse and search a list of common MIME types.
• Keycode Info: Identify JavaScript key codes for keyboard events.
• User-Agent Parser: Parse and display information from User-Agent strings.
• HTTP Status Codes: Quick reference for HTTP status codes and their meanings.
• URL Shortener: Create shortened URLs with analytics tracking and QR code generation.
• AI SEO Audit Tool: Comprehensive SEO analysis tool to audit websites for search engine optimization issues and improvements.

Graphics & Media

• Image Cropper & Resizer: Upload, crop, and resize images directly in your browser. Basic client-side image manipulation.
• Favicon Generator: Generate various favicon sizes (PNG) from a source image for your website.
• SVG Placeholder Generator: Generate customizable SVG placeholder images.
• Image Converter: Convert images between formats like JPG, PNG, WEBP, GIF.
• Image Metadata Viewer: Extract and view hidden EXIF, IPTC, XMP, and GPS metadata from images. Secure client-side processing with interactive maps for location data.
• Color Palette Generator: Generate harmonious color palettes and export them for your projects.
• Color Contrast Checker: Check WCAG compliance for color combinations with real-time analysis and accessibility scoring.
• Gradient Generator: Design colorful CSS gradients with live previews, presets, and export-ready code snippets.
• PDF Merger: Merge PDFs and images into a single PDF. Drag to reorder pages, rotate, and customize output.
• PDF Signature Checker: Check the validity of digital signatures in PDF documents.
• AI Logo Creator: Generate branded logo concepts with AI image generation, multiple styles, and downloadable variations.

Data & Parsing

• CSV Viewer: View, sort, and analyze CSV data with a user-friendly table interface and basic statistics.
• Mock Data Generator: Generate customizable sets of mock data (names, emails, numbers, etc.) in JSON or CSV format.
• Phone Parser & Formatter: Parse and format phone numbers for different regions.
• IBAN Validator, Parser: Validate, parse, and generate International Bank Account Numbers (IBANs).
• EML Analyzer: Analyze EML files, view headers, body, and attachments securely in your browser. Export headers for spam reporting.
• Cyber Pipeline: Chain data transformations visually with a drag-and-drop workflow builder.
• Email Normalizer: Normalize email addresses by removing dots or plus aliases.

Productivity

• To-Do List: Manage your tasks with a simple to-do list. Add, edit, and track your progress.
• Focus Timer: Boost your productivity with a versatile timer: Stopwatch, Pomodoro, and Countdown modes.
• Kanban Board: Organize tasks and projects with a flexible Kanban board. Drag, drop, and manage your workflow.
• Random Item Picker: Helps you make decisions by randomly picking an item from a list.
• QR Code Reader: Scan and decode QR codes from an image or your camera.
• Data Entry Practice: Improve your data entry speed and accuracy with practice exercises.
• Simple Poll Tool: Create and share simple polls to quickly gather opinions.

Fast & Responsive

All tools are built with performance in mind, ensuring a smooth experience on any device. No downloads needed - works directly in your browser.

Privacy Focused

Many tools process data in your browser. AI features send the input needed for processing to our server and selected AI or search providers. Research and contract task-store records are scheduled for deletion 30 minutes after task creation. This does not cover separate Co-STORM caches: Redis search-result entries expire after 24 hours, fetched-content entries after 7 days, duplicate-check entries that include fetched content after 30 days, and session or mind-map entries after 2 hours. Co-STORM also writes search, source-content, and mind-map payloads to Qdrant. This application configures no Qdrant expiry and does not delete those payloads when a task expires, so no Qdrant deletion window is configured. Third-party providers may apply their own privacy and retention policies.

Modern Design

Clean, intuitive interface that makes using these tools a pleasure. Works on desktop, tablet, and mobile devices.

Are these tools really free?

Yes, all tools on tools.lavx.hu are completely free to use. No registration, no credit card, no hidden fees. Some advanced AI-powered features may have usage limits.

Is my data safe?

Many tools process data in your browser. AI features send the input needed for processing to our server and selected AI or search providers. Research and contract task-store records are scheduled for deletion 30 minutes after task creation. This does not cover separate Co-STORM caches: Redis search-result entries expire after 24 hours, fetched-content entries after 7 days, duplicate-check entries that include fetched content after 30 days, and session or mind-map entries after 2 hours. Co-STORM also writes search, source-content, and mind-map payloads to Qdrant. This application configures no Qdrant expiry and does not delete those payloads when a task expires, so no Qdrant deletion window is configured. Third-party providers may apply their own privacy and retention policies.

Do I need to install anything?

No installation required. All tools work directly in your web browser. Just open the tool you need and start using it immediately.

Can I use these tools on mobile?

Yes, all tools are designed to be responsive and work on desktop, tablet, and mobile devices. Some tools may work better on larger screens due to their complexity.