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Base64 Encoder/Decoder

Encode and decode Base64 strings quickly for debugging and development.

Encode/decode instantly.
Client-side processing.
Useful for headers and payloads.
Copy-friendly output.
Related:JWT DecoderURL EncodeSecurity Essentials

Frequently Asked Questions

Why does decoding fail?
Input must be valid Base64. Check padding and avoid URL-safe variants unless handled.
Does it support UTF-8?
Browser Base64 helpers may be limited for non-ASCII. Prefer UTF-8 safe helpers when needed.