Runs locally in your browser
Base64 Encoder & Decoder
Encode Unicode text or files, decode standard and URL-safe Base64, and restore Data URLs without sending your content to a server.
BASE64 TOOL
Encode text and files, or decode them again
Inputs stay on this device
TEXT · FILES · DATA URL
Private Base64 conversion
Nothing is uploaded, saved, or restored when you revisit this page.
Need JSON, URL, UUID, hash, or JWT tools? Open the full workbench →UTF-8Base64URL20 MB files
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A browser-based Base64 encoder and decoder
Use text mode to convert Unicode text with UTF-8, or paste standard Base64, Base64URL, and Data URLs to decode them. File mode reads binary bytes directly and can add a Data URL prefix when needed.
All work happens in browser memory. OmniKit does not upload your input, store results, or put source content into analytics. Files are limited to 20 MB to keep the page responsive.