Base64 Encoder / Decoder
Encode and decode Base64 strings. Free online Base64 encoder and decoder supporting text and file conversion.
Minimal, premium Base64 lab
Toggle Simple or Expert mode to reveal more controls and diagnostics.
Type text, hex, or binary. Decode expects Base64.
Base64 encodes, not encrypts.
Encoding:
Invalid sequence detected for chosen charset.
Pipeline
Raw bytes → [UTF-8] → Base64 (Standard, padding on, no wrap)
Input
Raw bytes
Charset
UTF-8 encode
Variant
Standard
Options
Padding on · No wrap
Ready.
Insights
Validation & metadataDetected content
None
No special content detected yet.
Base64 at a glance
Base64 is a binary-to-text encoding scheme for safe transport of bytes across systems that expect text. It is not encryption. Use Expert mode to tune URL-safe variants, padding, charset, MIME line wrapping, and to view diagnostics on invalid characters or padding issues.