Base64 Decoder

Base64 shows up everywhere: data URIs in CSS, Authorization: Basic headers, email MIME bodies, webhook payloads, Kubernetes secrets. When you need to see what's actually inside one of those blobs, paste it above and get the decoded text instantly.

Worth knowing: Base64 is encoding, not encryption. Anyone can decode it — including you, right here — so never treat a Base64 blob as protected. Decoding runs locally in your browser; nothing is sent anywhere.

FAQ

Is Base64 a form of encryption?

No. It's a reversible encoding with no key — anyone can decode it. Never rely on it to hide sensitive data.

Why do I get an error about invalid characters?

Standard Base64 uses A–Z, a–z, 0–9, + and /, padded with =. URL-safe variants swap in - and _. Stray characters outside that alphabet will fail decoding.

Can I decode Base64 images?

Binary payloads like images or archives won't decode to readable text — this decoder is meant for text payloads like tokens, headers, and config blobs.