Data & Developer

Base64 Encoder / Decoder

Encode or decode text and files to Base64 or URL-safe Base64. Auto-detects encoded input. Runs entirely in your browser.

mode:encodefmt:base64standard
bytes.transcoder/base64.io
◉ client-only
Base64 · Bytes Transcoder

Encode & decode bytes

Auto-detect encoded input, switch between base64, hex, binary, decimal, and run files (up to 10 MB) entirely in your browser.

b64
output:
input.stream
plaintext
13 charsauto → encode
output.stream
encode (base64)
aGVsbG8sIHdvcmxkIQ==
20 charsbase64
binary.upload
file → base64 (up to 10 MB)