Base64 Tool
Client-Side
Encode and decode Base64 strings instantly in your browser. Supports standard and URL-safe Base64. No data leaves your device.
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About Base64
Base64 encodes binary data as ASCII text using 64 printable characters. It's commonly used in data URIs, JWTs, email attachments (MIME), and API payloads. URL-safe Base64 replaces + and / with - and _ to avoid conflicts in URLs and filenames.