A collection of 140+ useful tools to help you with everyday tasks. Simple, fast, and free to use. No registration required.
All tools are built with performance in mind, ensuring a smooth experience on any device. No downloads needed - works directly in your browser.
We value your privacy. Most tools process data directly in your browser - your data never leaves your device. No tracking, no data collection.
Clean, intuitive interface that makes using these tools a pleasure. Works on desktop, tablet, and mobile devices.
Welcome to tools.lavx.hu, your one-stop destination for free online productivity tools. Our collection includes 140+ carefully crafted utilities spanning multiple categories including Security & Cryptography, Code & Development, Text & Document processing, Financial Tools, Networking & DNS utilities, and much more.
Whether you need to generate secure passwords, format JSON, calculate crypto conversions, analyze emails, or create QR codes - we have a tool for that. All tools work directly in your browser, require no registration, and are completely free to use.
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.
Absolutely. Most tools process data entirely in your browser - nothing is sent to our servers. For tools that require server processing (like AI features), we don't store your data after processing.
No installation required. All tools work directly in your web browser. Just open the tool you need and start using it immediately.
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.
Check and correct grammar in your text with AI, showing detailed changes.
Translate text between various languages using advanced AI models.
Generate branded logo concepts with AI image generation, multiple styles, and downloadable variations.
Summarize long articles, documents, or research papers into concise, accurate summaries of varying lengths.
Generate professional emails based on brief descriptions of intent with customizable tone and length.
Professional audio transcription powered by AssemblyAI. Fast, accurate, supports 99+ languages. Export as TXT or JSON with timestamps.
Get plain-language explanations of code snippets and suggestions for optimization.
Analyze contracts, terms of service, or legal documents to highlight important clauses, potential issues, and explain legal jargon in plain language.
Get a curated collection of key facts, arguments, counterarguments, and sources on any research topic.
Create professional job descriptions with AI assistance. Customize details and save for later use.
AI-powered tool to analyze and match resumes with job descriptions for HR professionals.
Comprehensive SEO analysis tool to audit websites for search engine optimization issues and improvements.
Generate professional legal contracts with AI assistance. Multi-step wizard for NDAs, employment agreements, service contracts, and more.
Build powerful search dorks with 7000+ prebuilt queries, visual mix & match builder, and AI-powered generation. 14 categories for security research.
Search and analyze CVEs with EPSS exploitation scores, CISA KEV alerts, CVSS metrics, and AI-powered explanations. Track vulnerabilities with a watchlist.
Format and manipulate text with various options like case conversion, sorting, and more.
Create and edit Markdown documents with live preview, syntax highlighting, and export options.
Generate placeholder text in various formats with customizable length and formatting options.
Compare two texts and visualize the differences. Perfect for code reviews or tracking document changes.
Convert lists between different formats and delimiters.
Analyze text for word count, character count, and other metrics.
Easily find and copy emojis to use in your texts.
Convert images or text into ASCII art.
Quickly convert plain text into a downloadable PDF document.
Share code and text with syntax highlighting, multiple visibility levels, search, and persistent storage.
Format and beautify code in various programming languages with syntax highlighting and specialized JSON features.
Format, validate JSON data, and optionally validate against a JSON schema.
Test and debug regular expressions with real-time highlighting and detailed match information.
Create and understand cron expressions for scheduling tasks with a user-friendly interface.
Visually calculate and understand Unix/Linux file permissions (octal and symbolic).
Beautify and format your SQL queries with various dialect options for better readability.
Convert between various CSS units (px, em, rem, vw, vh, etc.) with contextual inputs.
Quick reference for common Git commands and workflows.
Convert Docker run commands to Docker Compose file format.
Create and run JavaScript benchmarks to compare code performance.
Decode and inspect JSON Web Tokens (JWT).
Verify the signature of JSON Web Tokens (JWT) using secret or public keys.
Create and sign JSON Web Tokens with various algorithms.
Fetch and inspect JSON Web Key Sets (JWKS) from public endpoints.
Convert between different units of measurement including length, weight, temperature, and more.
Convert between color formats (HEX, RGB, HSL) with visual preview and color palette generation.
Encode and decode Base64 data with support for text, images, and files.
Encode and decode text in various formats including Base64, URL encoding, HTML entities, and more.
Convert between HTML entities and their corresponding characters with real-time preview.
Convert numbers between binary, octal, decimal, and hexadecimal systems.
Convert dates and times between different formats and timezones.
Convert numbers to and from Roman numerals.
Convert JSON data to other formats like XML, YAML, etc.
Convert between Unix timestamps and human-readable dates. Support for multiple formats, timezones, and live clock display.
Find optimal meeting times across multiple timezones. Visualize working hours overlap and generate shareable meeting details.
Generate various hash types (MD5, SHA-1, SHA-256, etc.) for text input with comparison functionality.
Create strong, secure passwords with customizable options and strength analysis.
Create customized QR codes with colors, logos, and styling options for any URL or text.
Generate HMAC (Hash-based Message Authentication Code) using various hash algorithms and a secret key.
Encrypt and decrypt messages using PGP (OpenPGP.js) with provided keys.
Generate new PGP (RSA or ECC) key pairs, optionally protected by a passphrase.
Generate RSA SSH key pairs (public key in OpenSSH format) client-side.
Generate and verify Bcrypt hashes for password security.
Analyze the strength of your passwords.
Paste certificate, private key, CSR, and OpenSSL cnf to validate locally; generate RSA keys, CSRs, and self‑signed certs in browser.
Generate Time-based One-Time Passwords (TOTP).
Create and share one-time readable, password-protected, encrypted notes with optional email notifications when viewed.
Analyze images for hidden data. Visualize bit planes, extract strings, and inspect hex dumps securely in your browser.
Safely format and defang malicious URLs and IP addresses for reporting. Convert http to hxxp and more.
Identify unknown hash strings. Detects MD5, SHA-1, SHA-256, Bcrypt, and many other hash algorithms based on format and length.
Generate common corporate email address formats from a name and domain. Useful for OSINT investigations and sales prospecting.
Generate look-alike domains using ASCII substitution, Unicode homoglyphs, and common typos. Useful for phishing research and defensive monitoring.
Detect IDN homograph attacks and analyze domain security. Convert between Unicode and Punycode with character breakdown, risk scoring, and 200+ attack patterns library.
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.
Analyze HTTP response headers for security best practices. Check for HSTS, CSP, X-Frame-Options, and more to get a security grade.
Interactive cheatsheet for pentesters. Copy common SQLi, XSS, RCE, and other payloads with a single click.
Check if a username is taken across popular platforms like GitHub, GitLab, Reddit, and more.
Build and discover Shodan, Censys, ZoomEye queries with 600+ pre-built IoT/ICS security research queries. Visual builder with drag-and-drop operators.
Generate universally unique identifiers (UUIDs).
Generate universally unique lexicographically sortable identifiers (ULIDs).
Generate BIP39 mnemonic phrases for crypto wallets.
Generate cryptocurrency wallets for various blockchains with private keys and mnemonic phrases.
Track cryptocurrency prices in real-time with historical charts and market data.
Calculate conversions between different cryptocurrencies and fiat.
Calculate capital gains tax, import transaction history, and generate tax reports for cryptocurrency investments.
Estimate gas fees for Ethereum and other blockchain transactions with real-time network data.
Calculate yields, APYs, impermanent loss, and other DeFi metrics for better investment decisions.
Explore blockchain transactions, check address balances, and interact with smart contracts across multiple networks.
Create, analyze, and manage NFTs with tools for metadata generation, rarity checking, and collection exploration.
Calculate ROI, visualize compound interest, and simulate dollar-cost averaging for various investment strategies.
Manage multi-asset portfolios, visualize performance, and analyze diversification across different investments.
Calculate mortgage and auto loan payments, generate amortization schedules, and plan early payoff strategies.
Manage monthly budgets, categorize expenses, and visualize savings goals with interactive charts.
Convert between currencies with real-time exchange rates, view historical charts, and analyze correlations.
Calculate option prices, visualize profit/loss scenarios, and analyze option Greeks for better trading decisions.
Easily calculate tips and split bills for dining out.
Validate credit card numbers using the Luhn algorithm and detect card type.
Evaluate mathematical expressions with support for variables and functions.
Calculate Estimated Time of Arrival based on speed and distance.
Calculate percentages, percentage change, and more.
Calculate the right mix of hot and cold water to achieve a specific target temperature.
A tool to calculate the correct mix of nutrients for plants.
Calculate network ranges, subnet masks, and available hosts from CIDR notation.
Break down URLs into components, analyze query strings, and rebuild URLs.
Identify the vendor of a network device by its MAC address using an OUI database.
Browse and search a list of common network ports and their associated services.
Convert IPv4 addresses between decimal, binary, and hexadecimal formats.
Expand CIDR notation or IP ranges into a list of individual IP addresses.
Generate Unique Local Addresses (ULA) for IPv6 networks.
Perform DNS lookups for A, AAAA, CNAME, TXT, MX records and parse SPF/DMARC records.
Inspect SSL/TLS certificates, chain, expiry, supported protocols and cipher suites for a host.
Find your public IP address and geolocation information including country, city, ISP, and more.
Lookup geolocation information for any IP address. Find location, ISP, and other geographic data for IPv4 and IPv6 addresses.
View information about your current device and browser.
Generate Basic Authentication headers for HTTP requests.
Generate Open Graph meta tags for social media sharing.
Browse and search a list of common MIME types.
Identify JavaScript key codes for keyboard events.
Parse and display information from User-Agent strings.
Quick reference for HTTP status codes and their meanings.
Create shortened URLs with analytics tracking and QR code generation.
Upload, crop, and resize images directly in your browser. Basic client-side image manipulation.
Generate various favicon sizes (PNG) from a source image for your website.
Generate customizable SVG placeholder images.
Convert images between formats like JPG, PNG, WEBP, GIF.
Extract and view hidden EXIF, IPTC, XMP, and GPS metadata from images. Secure client-side processing with interactive maps for location data.
Generate harmonious color palettes and export them for your projects.
Check WCAG compliance for color combinations with real-time analysis and accessibility scoring.
Design colorful CSS gradients with live previews, presets, and export-ready code snippets.
Merge PDFs and images into a single PDF. Drag to reorder pages, rotate, and customize output.
Check the validity of digital signatures in PDF documents.
View, sort, and analyze CSV data with a user-friendly table interface and basic statistics.
Generate customizable sets of mock data (names, emails, numbers, etc.) in JSON or CSV format.
Parse and format phone numbers for different regions.
Validate, parse, and generate International Bank Account Numbers (IBANs).
Analyze EML files, view headers, body, and attachments securely in your browser. Export headers for spam reporting.
Chain data transformations visually with a drag-and-drop workflow builder.
Normalize email addresses by removing dots or plus aliases.
Manage your tasks with a simple to-do list. Add, edit, and track your progress.
Boost your productivity with a versatile timer: Stopwatch, Pomodoro, and Countdown modes.
Organize tasks and projects with a flexible Kanban board. Drag, drop, and manage your workflow.
Helps you make decisions by randomly picking an item from a list.
Scan and decode QR codes from an image or your camera.
Improve your data entry speed and accuracy with practice exercises.
Create and share simple polls to quickly gather opinions.
Trusted by thousands of users worldwide for everyday productivity tasks
All tools are built with performance in mind, ensuring a smooth experience on any device. No downloads needed - works directly in your browser.
We value your privacy. Most tools process data directly in your browser - your data never leaves your device. No tracking, no data collection.
Clean, intuitive interface that makes using these tools a pleasure. Works on desktop, tablet, and mobile devices.
Welcome to tools.lavx.hu, your one-stop destination for free online productivity tools. Our collection includes 140+ carefully crafted utilities spanning 16 categories including Security & Cryptography, Code & Development, Text & Document processing, Financial Tools, Networking & DNS utilities, and much more.
Whether you need to generate secure passwords, format JSON, calculate crypto conversions, analyze emails, or create QR codes - we have a tool for that. All tools work directly in your browser, require no registration, and are completely free to use.
Built with Next.js and designed to be fast, responsive, and user-friendly. Our tools are regularly updated with new features and improvements.
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.
Absolutely. Most tools process data entirely in your browser - nothing is sent to our servers. For tools that require server processing (like AI features), we don't store your data after processing.
No installation required. All tools work directly in your web browser. Just open the tool you need and start using it immediately.
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.
We offer 135+ tools across 16 categories including AI-Powered Tools, Text & Document processing, Code & Development, Security & Cryptography, JWT Tools, Encoding & Conversion, Networking & DNS, Financial Tools, Blockchain & Crypto, and more.
Yes! We have 15+ AI-powered tools including AI Grammar Checker, AI Translator, AI Logo Creator, AI Content Summarizer, AI Email Composer, AI Code Explainer, and more. These use advanced language models to help with various tasks.
Our security tools like Password Generator, Hash Generator, and encryption tools run entirely in your browser using client-side JavaScript. Your passwords and sensitive data never leave your device.
Absolutely! We have many developer-focused tools including JSON Formatter, Code Formatter, RegEx Tester, Base64 Encoder/Decoder, JWT Parser, CIDR Calculator, and many more utilities for everyday development tasks.
Most tools have no limits at all. Some AI-powered features may have daily usage limits to prevent abuse, but these limits are generous enough for normal use. There are no limits on non-AI tools.
We regularly add new tools based on user feedback and emerging needs. Check back frequently or follow our updates to see the latest additions to our toolkit.