Base64 Encoder/Decoder

This tool encodes text and files into Base64 and decodes Base64 back into its original form, with full Unicode handling and a URL-safe variant for use in query strings. Base64 converts binary data into plain ASCII text so it can travel safely through systems that only expect text, such as URLs, email and JSON payloads.

Developers reach for it when embedding images in CSS, passing small pieces of data in a URL, inspecting API tokens, or decoding a payload while debugging. Having both directions and a URL-safe option in a single place covers the situations that come up most often, so you are not switching between separate encoder and decoder tools.

Encoding and decoding run entirely in your browser, so your data is never uploaded to a server. There is no install and no account, which keeps tokens, credentials and other sensitive strings on your own device where they belong rather than passing through a remote service.