37 free tools in this category. Page 2 of 4.
Escape special characters to HTML entities or convert them back to text. Encode prevents XSS vulnerabilities. Decode fixes broken code snippets. Free, instant.
Decode and inspect JWTs (JSON Web Tokens) online. View header algorithm, payload claims, expiration times, and user data instantly. Free, no signup required.
Convert titles, headings, and text into clean, SEO-friendly URL slugs instantly. Supports kebab-case, snake_case, camelCase, PascalCase, and bulk mode.
Format and beautify complex SQL queries instantly. Add proper indentation, uppercase keywords, and make your SQL readable. Free tool, no signup, MySQL and PostgreSQL.
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds with auto-detection, UTC and local time display, and a live epoch clock.
Encode text to URL-safe percent-encoded format or decode URLs back to readable text. Handles special characters, emojis, query strings, and UTF-8 multibyte characters.
Generate random UUIDs (v4) and GUIDs instantly. Bulk creation up to 1,000 at a time with options for uppercase, hyphens, and braces. Free, no signup needed.
Convert HTML to clean, readable Markdown instantly. Handles headings, links, images, lists, tables, code blocks, and blockquotes with proper Markdown formatting.
Free HTTP header checker and security audit tool. Analyze response headers, check CSP, HSTS, X-Frame-Options, and get an A-F security grade for any website.
Convert images to Base64 encoded strings instantly. Supports PNG, JPG, GIF, SVG, and WebP. Get data URIs for embedding images directly in HTML, CSS, or JSON.
Set up IndexNow in minutes with this step-by-step wizard. Generate your API key, validate hosting, and bulk submit URLs to Bing, Yandex, and other search engines.
Minify JavaScript code by removing comments, whitespace, and console.log statements. Free online JS compressor with one-click copy and .min.js download.
Showing 13-24 of 37 tools