Base64 Converter
Encode and decode text and binary files to and from Base64 with full UTF-8 Unicode support.
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100% Local Browser Privacy
All computation happens right in your browser's JavaScript engine. No data is ever sent to any remote server.
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Instant Results
Zero network latency. Calculations and formatting are executed instantly with high cryptographic and mathematical precision.
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Works Offline
Once loaded, this tool can function completely offline with no active internet connection required.
Frequently Asked Questions
Does this support Unicode and non-Latin characters?
Yes, it uses TextEncoder and TextDecoder to support all UTF-8 characters without btoa() character errors.
Can I convert images or files to Base64 data URLs?
Yes, use the 'Upload File' button to convert any file into a Base64 string.