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Base64 Encoder Decoder

Encode and decode Base64 data instantly with our free online tool. Convert text, images, and files securely with 100% local browser processing.

Source Text / String
Input Length: 0 bytes100% Local Sandboxed
Base64 Code Output
14px
Output Length: 0 bytesSecure Output Sandbox

100% Secure Client-Side Base64 Engine

This converter is built entirely inside your browser memory sandbox. It utilizes standardized Web APIs to encode and decode text, images, and files completely locally.

Unlike online converters that send your sensitive data and files to external servers, Utilvo guarantees that none of your documents, credentials, or strings are ever logged or uploaded.

Unicode & UTF-8 Compatibility

Seamlessly encodes and decodes international characters, including Arabic strings, bypassing DOMException issues.

100% Offline Sandboxed Conversion

All data remains local. Drag and drop any image, document, or key to instantly convert it in your browser memory.

Automatic Data URI Formatting

Instantly wraps your file outputs into standardized HTML/CSS-ready Data URLs for fast developer embedding.

64
Base64 Engine active
Safe String APIencodeURIComponent()
Target CompatibilityUTF-8 / Unicode Arabic
100% OfflineLocal Sandboxed