Base64 Encoder & Decoder
100% Client-Side • Local Browser ProcessingPlain Text Input
Base64 Output
Local browser processing • No data sent to any server
100% Client-Side Processing
All encoding and decoding uses native btoa/atob and TextEncoder/TextDecoder APIs. Your data never leaves your browser.
URL-Safe Base64 (RFC 4648)
Toggle URL-safe mode to replace + with -, / with _, and strip padding. Safe for use in URLs and HTTP headers.
File to Data URI
Upload any file to instantly generate a Base64-encoded Data URI, ready for embedding in HTML, CSS, or API payloads.
Open & Client-Side
Built for Daily Developer Workflows
Free, browser-based utilities that format, validate, and convert data locally. No accounts, no ads, no backend data collection.