Instantly encode or decode text and binary files to Base64 format offline in your browser.
Files are processed in your browser. We never upload your sensitive document data to any server.
Zero storage. Zero leaks. Since no backend files exist, your documents stay completely yours.
No registration, no limits, no credit card. Access premium conversion features free forever.
Choose a tab: Text Converter, File Encoder, or File Decoder.
Input your text, drag in any file, or paste a Base64 string.
Perform encoding/decoding operations and download files or copy outputs.
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ConvertNest's Base64 Converter is a flexible utility tailored for developers, systems administrators, and database engineers.
Easily compile images, icons, configurations, or PDFs into lightweight Base64 strings for CSS/HTML injection, or restore binary assets from database dumps without complex server setups.
Yes. All conversions happen directly on your device. Your file content and text inputs are never sent to any external servers, meaning they remain 100% confidential and secure.
Raw Base64 is just the encoded data bytes. A Data URI prefixes this raw string with metadata (e.g., 'data:image/png;base64,...'), allowing browsers to embed the file directly in HTML source tags.
Yes. Our text encoder and decoder use specialized URI encoding wrappers to prevent broken character symbols when processing non-English characters or emojis.