Free Encoder & Decoder Tools
Encode and decode the formats that move data between systems: Base64, URL percent-encoding, HTML entities. Browser-side, no logging.
Base64 Encode / DecodeEncode text to Base64 or decode Base64 back to text.
URL Encode / DecodePercent-encode and decode URL parameters and paths.
HTML Entities EncodeEscape and unescape HTML entities — & < > etc.
PNG to Base64Encode images as data URIs.
Base64 to PNGDecode data URIs back to images.
Why use browser-side encoders?
Encoding tools often handle sensitive data — API tokens, OAuth credentials, customer-identifying strings, internal IDs. Pasting that into a server-based encoder is a privacy risk. The tools here process text entirely in your browser; nothing is uploaded or logged.