Web Tools
Free, browser-based utilities for web developers and frontend engineers. Search vector icon sets like Heroicons and Lucide Icons, encode and decode URLs and HTML, inspect JWT tokens, convert between Markdown and HTML, and calculate CSS units. Every tool runs 100% locally in your browser.
All Web Tools
URL EncoderEncode strings into a URL-safe format.URL DecoderDecode URL-encoded strings to their original format.URL ParserBreak down URLs into their constituent components.HTML EncoderEncode special HTML characters to prevent rendering issues.HTML DecoderDecode HTML entities back to their original characters.Base64 EncoderEncode text into Base64 format for safe transmission.Base64 DecoderDecode Base64 strings back to their original text format.JWT DecoderDecode a JSON Web Token to read its header and payload, see when it expires, and verify HS256/384/512 signatures. Runs entirely in your browser.HTML to MarkdownConvert HTML code into Markdown format.Markdown to HTMLConvert Markdown text into HTML code.CSV to MarkdownConvert CSV or TSV spreadsheets into formatted GitHub Flavored Markdown tables with column alignment and padding.Markdown to CSVConvert GitHub Flavored Markdown tables into clean, RFC 4180 compliant CSV or TSV spreadsheet files.HTML to ThymeleafConvert plain HTML into a Thymeleaf template.CSS Unit ConverterConvert between PX, REM, and EM units with configurable root font size.Lucide Icons ExplorerSearch 1,550+ Lucide vector icons by name or tag. Customize stroke width, size and colors, and copy React, Angular, Vue, Svelte, or clean SVG code.Heroicons ExplorerSearch 320+ Tailwind CSS Heroicons by Tailwind Labs. Preview Outline, Solid, Mini, and Micro styles, customize Tailwind classes (size-*, text-*), and copy React JSX, Vue, or clean SVG code.Age on Other PlanetsEnter your birth date to see how old you are on Mercury, Mars, Jupiter, Saturn and beyond — with your next birthday on each planet. Uses NASA orbital data.Affirm BNPL CalculatorCalculate Buy Now Pay Later payment options for Target purchases. See monthly payments, APR rates, and total costs.
Which Web tool do I need?
| I want to… | Use |
|---|---|
| Search 320+ Tailwind CSS Heroicons across Outline, Solid, Mini & Micro | Heroicons Explorer |
| Explore 1,550+ Lucide vector icons with customizable stroke width & multi-framework copy | Lucide Icons Explorer |
| Percent-encode strings and query parameters for safe URLs | URL Encoder |
| Decode percent-encoded URL parameters into human-readable text | URL Decoder |
| Deconstruct a URL into protocol, hostname, port, path, query params & hash | URL Parser |
| Encode HTML entities (<, >, &, ") for safe rendering in web pages | HTML Encoder |
| Decode HTML entities back to raw unescaped text | HTML Decoder |
| Encode text, credentials, or API payloads into Base64 format | Base64 Encoder |
| Decode Base64 strings back to readable text | Base64 Decoder |
| Inspect and debug JWT header and payload claims securely in your browser | JWT Decoder |
| Convert HTML markup or articles into clean GitHub-flavored Markdown | HTML to Markdown |
| Convert Markdown documents into semantic HTML markup | Markdown to HTML |
| Turn CSV spreadsheets into GitHub-flavored Markdown pipe tables | CSV to Markdown |
| Turn Markdown tables into clean CSV format for spreadsheets | Markdown to CSV |
| Convert static HTML templates into Spring Boot Thymeleaf templates | HTML to Thymeleaf |
| Convert between responsive CSS units (px, rem, em, %, vh, vw) | CSS Unit Converter |
| Calculate your exact age and orbital birthdays across solar system planets | Age on Other Planets |
| Calculate Buy Now Pay Later payment schedules and APR interest costs | Affirm BNPL Calculator |