Free Online Tools

Powerful tools for developers, marketers, and teams. Convert data formats, analyze websites, and more. All tools work in your browser with no signup required.

Convert to Markdown

Convert various file formats to Markdown

CSV to Markdown

Convert CSV files to beautifully formatted Markdown tables. Perfect for documentation and GitHub READMEs.

JSON to Markdown

Convert JSON data to readable Markdown format. Great for API documentation and data visualization.

HTML to Markdown

Convert HTML content to clean Markdown. Ideal for migrating content or cleaning up web pages.

Markdown to HTML

Convert Markdown to HTML. Transform your Markdown content into clean, valid HTML code.

Markdown Printer

Preview and print Markdown documents with beautiful formatting. Render Markdown with syntax highlighting and export to PDF.

Encoding & Decoding

Encode and decode text in various formats

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings. Supports UTF-8 text encoding.

Image to Base64 Converter

Convert images to Base64 strings and Data URLs. Encode PNG, JPG, GIF, and other image formats to base64.

URL Encoder/Decoder

Encode and decode URLs online. Convert special characters to URL-safe format.

HTML Entity Encoder/Decoder

Encode and decode HTML entities. Convert special characters to HTML entities.

Hex & Binary Converter

Convert text to hexadecimal or binary and back. Useful for debugging and data analysis.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT). View header, payload, and expiration information.

Backslash Escape/Unescape

Escape and unescape backslash special characters. Convert newlines, tabs, quotes, and other escape sequences.

Hash & Cryptography

Generate hashes and cryptographic operations

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text.

Converters

Convert between different formats and units

Color Converter

Convert colors between HEX, RGB, HSV, and CMYK formats with visual preview.

Number Base Converter

Convert numbers between decimal, binary, hexadecimal, octal, and Roman numerals.

CSS Unit Converter

Convert CSS units between px, rem, em, pt, %, vw, and vh. Calculate responsive units with custom base font size and viewport settings.

YAML ↔ JSON Converter

Convert between YAML and JSON formats. Transform configuration files and data structures.

JSON to CSV Converter

Convert JSON to CSV or CSV to JSON. Bidirectional data converter with custom delimiter support for spreadsheet import and export.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Support for seconds and milliseconds.

IP Address Converter & Analyzer

Convert IPv4 addresses to decimal, binary, and hexadecimal. Analyze IP class and check if private or public.

Text Tools

Text manipulation and analysis tools

Text Case Converter

Convert text between different cases: UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.

Word Counter

Count words, characters, sentences, and paragraphs. Get reading and speaking time estimates.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text for your designs and mockups.

Regex Tester

Test and debug regular expressions in real-time. See matches highlighted with group information.

Text Diff Checker

Compare two texts and see the differences highlighted. Perfect for code reviews and document comparison.

Line Tools

Sort lines alphabetically, remove duplicates, remove empty lines, reverse, shuffle, and trim whitespace from text lines.

Generators

Generate random data and identifiers

UUID Generator

Generate random UUIDs (v4) for databases, APIs, and unique identifiers.

Password Generator

Generate strong, secure random passwords with customizable options.

Random String Generator

Generate random strings with customizable length and character sets. Create secure alphanumeric strings for testing and development.

Markdown Table Generator

Generate markdown tables with a visual editor. Create tables for GitHub, documentation, and any markdown content.

Cron Expression Generator

Generate and parse cron expressions with a visual editor. Build crontab schedules with presets and human-readable descriptions.

QR Code Generator

Generate QR codes for URLs, text, and more. Customize size, colors, and error correction level. Download as PNG.

Formatters & Validators

Format and validate code and data

JSON Formatter & Validator

Format, beautify, minify, and validate JSON data with syntax error detection.

SQL Formatter & Beautifier

Format, beautify, minify, and validate SQL queries with syntax validation and keyword case options.

HTML Minifier

Minify HTML code by removing whitespace and comments. Reduce file size and improve load times.

CSS Minifier

Minify CSS code by removing whitespace, comments, and redundant code. Optimize stylesheets for production.

JavaScript Minifier

Minify JavaScript code by removing whitespace and comments. Reduce file size for faster loading.

SEO Tools

Tools for SEO and website analysis

Sitemap Finder & Checker

Find and validate XML sitemaps for any website. Check sitemap health and discover sitemap locations.

Sitemap URL Extractor

Extract all URLs from XML sitemaps. Export URLs for analysis, SEO audits, or content migration.

Website URL Extractor

Crawl and extract all URLs from a website. Perfect for site audits and link analysis.

Meta Tag Generator

Generate SEO meta tags including Open Graph and Twitter Card tags. Optimize your pages for search engines and social media.

Robots.txt Generator

Create robots.txt files for your website. Control how search engines crawl and index your content.

URL Slug Generator

Convert text to URL-friendly slugs. Create clean, SEO-friendly URLs for your content.

UTM Link Builder

Build UTM tracking URLs for Google Analytics campaigns. Generate and parse UTM parameters for marketing links.

Social Media Image Size Guide

Complete guide to social media image sizes for Facebook, Instagram, Twitter, LinkedIn, and YouTube. Get recommended dimensions and aspect ratios.

Calculators & Generators

Useful calculators and content generators