Base64 Encode / Decode Online

Base64 encodes arbitrary data into ASCII text. Developers use it constantly for debugging, decoding cookies / tokens, and proxy users use it to decode subscription links.

This tool encodes/decodes entirely in your browser (UTF-8 safe), with no server round-trip. Proxy subscription links (ss:// vmess:// or clash) are usually a Base64 blob — paste and Decode to see the plaintext node config.

Tip: proxy subscription links (ss/vmess/clash) are usually Base64 — paste and Decode to see the plaintext nodes. Everything runs locally, never uploaded.

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FAQ

How do I decode a subscription link?

Paste the subscription content (a long Base64 string), choose Decode, and you'll see the plaintext node list. It all happens locally, never uploaded.

Does it handle Unicode?

Yes — UTF-8 safe, so Chinese and emoji encode/decode without corruption.

Is Base64 encryption?

No. Base64 is just encoding (anyone can reverse it) — it provides no confidentiality. Use real encryption for secrets.

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