IT Tools
Free online tools for developers, sysadmins, and IT professionals. Generators, converters, formatters, decoders, and network utilities. Everything runs in your browser with no sign-up required.
Security & Cryptography
Password Generator
Generate secure passwords and passphrases with customizable length and character types.
Password Strength Calculator
Check password strength, entropy, and estimated crack time.
Secure Random Generator
Generate cryptographically secure random strings with custom length and character options.
Hash Generator
Generate SHA-256, SHA-384, SHA-512, and MD5 hash digests from any text input.
HMAC Generator
Generate HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 message authentication codes.
SSL Certificate Decoder
Decode PEM certificates to view subject, issuer, expiry, SANs, and fingerprints.
Encoding & Conversion
Base64 Image Encoder
Encode images to Base64 data URIs for embedding in CSS and HTML.
HTML Entity Encoder/Decoder
Encode text to HTML entities or decode entities back to plain text.
Escape/Unescape Tool
Escape and unescape text for JSON, URL, HTML, backslash, and Unicode formats.
UUID Generator
Generate cryptographically secure UUID v4 identifiers for databases, APIs, and distributed systems.
QR Code Generator
Generate QR codes from any text or URL with instant download.
Base64 Encoder/Decoder
Encode and decode text to Base64 online. Supports standard and URL-safe Base64 encoding with instant results.
URL Encoder/Decoder
Encode and decode URLs online. Convert special characters to percent-encoded format for safe use in web addresses.
Hex/ASCII Converter
Convert between hexadecimal and ASCII text. View hex, binary, and decimal representations with multiple output formats.
Data Format Tools
YAML to JSON Converter
Convert between YAML and JSON formats bidirectionally with instant preview.
CSV to JSON Converter
Convert CSV data to JSON with configurable headers and delimiter options.
JSON to CSV Converter
Convert JSON arrays of objects to CSV format with configurable delimiters.
JSON to YAML Converter
Convert JSON data to clean, readable YAML format with size comparison and key count analysis.
JSON to TypeScript Generator
Generate TypeScript interface definitions from JSON data with automatic type inference and nested object support.
XML to JSON Converter
Convert XML documents to JSON with attribute and nested element support.
SQL Formatter
Format and indent SQL queries with keyword uppercasing and clause alignment.
Code Minifier/Beautifier
Minify or beautify JSON, CSS, HTML, and JavaScript code with size comparison.
Code Formatters
HTML Formatter/Beautifier
Format, beautify, and minify HTML code with proper indentation, tag counting, and size analysis.
CSS Formatter/Beautifier
Format, beautify, and minify CSS stylesheets with rule counting, selector analysis, and size comparison.
JavaScript Formatter/Beautifier
Format, beautify, and minify JavaScript code with function counting, line analysis, and size comparison.
HTML to JSX Converter
Convert HTML to JSX for React. Automatically converts class to className, for to htmlFor, self-closes void elements, and transforms inline styles.
File Converters
CSV to Excel Converter
Convert CSV data to downloadable Excel .xlsx files entirely in the browser.
Excel to CSV Converter
Upload an Excel .xlsx file and convert it to CSV format with delimiter options.
Markdown to HTML Converter
Convert Markdown to clean HTML with live preview. Supports headings, lists, code blocks, tables, and more.
HTML to Markdown Converter
Convert HTML markup to Markdown syntax. Handles headings, formatting, links, tables, and code blocks.
TXT to PDF Converter
Convert plain text files to properly formatted, downloadable PDF documents with customizable font size and page layout.
CSV to PDF Converter
Convert CSV data to a formatted PDF table with headers, alternating row colors, and proper pagination.
Markdown to PDF Converter
Convert Markdown documents to beautifully formatted PDF files with headings, lists, code blocks, and tables.
Excel to PDF Converter
Convert Excel spreadsheets to formatted PDF tables preserving column structure and data formatting.
DOCX to PDF Converter
Convert Word documents to PDF format preserving headings, paragraphs, lists, and basic formatting.
ODT to DOCX Converter
Convert OpenDocument .odt files to Microsoft Word .docx format entirely in the browser.
ODT to PDF Converter
Convert OpenDocument .odt files to PDF format with headings and paragraphs entirely in the browser.
DOCX to ODT Converter
Convert Microsoft Word .docx files to OpenDocument .odt format for LibreOffice and OpenOffice.
Networking
CIDR/Subnet Calculator
Calculate network address, broadcast, subnet mask, and usable hosts from IP and CIDR prefix.
IP Address Lookup
Analyze IP addresses for class, private/public status, and optional geolocation lookup.
DNS Lookup
Query DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA) via DNS-over-HTTPS.
MAC Address Lookup
Identify network device manufacturers from MAC address OUI prefixes.
Port Number Reference
Search common network ports by number or service name with protocol and category info.
URL Parser
Break any URL into its components: scheme, host, port, path, query parameters, and fragment.
Web & HTTP
HTTP Header Parser
Parse raw HTTP headers and analyze security header coverage with a letter grade.
CORS Header Checker
Analyze CORS response headers and test cross-origin request scenarios.
CSP Header Builder
Build Content-Security-Policy headers visually with per-directive source controls.
JWT Decoder
Decode and inspect JWT tokens to view header, payload, claims, and expiration status.
Color Converter
Convert colors between HEX, RGB, and HSL formats with WCAG contrast checking.
Color Palette Picker
Pick any color from a visual gradient palette and get HEX, RGB, and HSL codes.
HTTP Status Code Reference
Complete HTTP status code reference with search and category filtering across all 1xx-5xx codes.
Open Graph Preview
Preview how your page looks when shared on Facebook and Twitter with live OG tag editing.
cURL to Code Converter
Convert cURL commands to Python, JavaScript, Ruby, and PHP code instantly.
DevOps & Configuration
Nginx Config Generator
Generate Nginx server block configurations with SSL, reverse proxy, and caching options.
Dockerfile Generator
Generate Dockerfiles for Ruby, Python, Node.js, Go, and Java with multi-stage build support.
.gitignore Generator
Generate .gitignore files by selecting languages, frameworks, editors, and operating systems.
Env Variable Validator
Validate .env files for syntax errors, duplicate keys, and exposed secrets.
Cron Expression Parser
Parse cron expressions to see human-readable schedules and next run times.
Cron Job Generator
Build cron expressions visually by selecting minute, hour, day, month, and weekday fields.
chmod Calculator
Convert between numeric and symbolic Unix file permissions with a visual toggle grid.
robots.txt Generator
Generate and test robots.txt files online. Create crawler rules, add sitemaps, and test if URLs are allowed or blocked.
Text & Code
Regex Builder
Build and test regular expressions with live match highlighting and capture groups.
Markdown Table Generator
Build markdown tables visually with an editable grid and instant output.
Unix Timestamp Converter
Convert between Unix epoch timestamps and human-readable dates in both directions.
SVG to PNG Converter
Convert SVG to PNG images online using the browser Canvas API. Adjust scale and download the result.