Base64 Encoder & Decoder

convert · Client-Side

Encode and decode text or files to and from Base64 format with full UTF-8 support.

Runs 100% in your browser · Zero server upload · Fully private

How to Use Base64 Encoder & Decoder

Encode and decode text or files to and from Base64 format with full UTF-8 support. All processing happens 100% locally inside your web browser using client-side JavaScript. Your files and data are never uploaded to any remote cloud server, guaranteeing complete privacy and zero data leakage.

01. Select File or Input

Drag and drop files or enter text directly into the tool interface.

02. Instant Local Processing

Executed securely in browser memory with zero upload wait times.

03. Download & Export

Save your generated file or result immediately with zero watermarks.

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Frequently Asked Questions

Does this Base64 tool properly support emojis and foreign languages?▼

Yes. Our converter uses full UTF-8 byte encoding and decoding, preventing character corruption with emojis, symbols, and non-ASCII character sets.

Can I convert images and binary files to Base64 data URIs?▼

Yes! You can convert any file into a standard Base64 string or an HTML/CSS ready Data URI (e.g. data:image/png;base64,...), or convert a Base64 string back into a downloadable file.

Is my text or file sent to a backend server?▼

Never. All encoding and decoding runs 100% inside your browser using client-side JavaScript. Your text and documents remain completely private.

Is there any limit on string length?▼

There are no server limits or caps. It is bounded only by your browser memory.