Online URL & Base64 Encoder / Decoder
Free online tool to encode URL, decode URL, convert Base64, and escape HTML entities instantly in your browser.
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OutputURL Encode
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About The Transformer (URL, Base64 & HTML Encoder / Decoder)
The Transformer is a fast, 100% browser-based string converter. Encode and decode web URLs, Base64 data strings, and HTML entities instantly without sending your sensitive data over any network API.
URL Encode & Decode
Escapes special symbols, spaces (%20), and query params into valid percent-encoded RFC 3986 URI strings for safe HTTP requests and API endpoints.
Base64 Encode & Decode
Converts ASCII text and binary data into 64-character MIME format for data URIs, Authorization headers, and JWT token inspection.
HTML Entity Escape
Escapes reserved HTML markup characters (<, >, &) into entities to prevent XSS injection attacks.