CodeASystem developer tools
Decode Base64 to text, in your browser.
Convert Base64-encoded strings, tokens, and payloads back into clean UTF-8 text with instant client-side decoding.
Base64 Text & File Decoder
Decode standard or URL-safe Base64 strings and Data URIs back into readable UTF-8 text directly in your browser.
Base64 Input28 chars
Decoded UTF-8 Output
How it works
Instant UTF-8 decoding. Zero telemetry.
Decoding runs locally using standard TextDecoder and byte arrays. No data is stored, cached, or transmitted over the network.