Base64, HTML Entities & Encoding Tools
Web development involves constant encoding and decoding — embedding images as Base64, escaping HTML special characters, encoding URL parameters. These tools handle the conversions that developers look up or script multiple times per week.
- Covers free encoding and decoding tools — base64, html entities, url encoding.
- Covers convert between formats for web development, apis, and data embedding.
Base64 encoding converts binary data to ASCII text, making it safe to embed in HTML, CSS, JSON, and email. The most common use case in web development is data URIs — embedding small images directly in CSS as background-image: url(data:image/png;base64,...) to eliminate an HTTP request.
HTML entities replace characters that have special meaning in HTML — like < (less-than), > (greater-than), & (ampersand), and " (quotation mark) — with safe escape sequences. This prevents XSS vulnerabilities when displaying user input and ensures special characters render correctly.
URL encoding (percent-encoding) makes text safe for use in URLs. Spaces become %20, ampersands become %26, and non-ASCII characters are encoded as UTF-8 byte sequences. The tool handles both full URL encoding (preserving structural characters like ://) and component encoding (encoding everything for use inside query parameters).