Encode & Crypto
Base64URL Encode
Produce URL-safe Base64 without padding characters.
Encode & Crypto
Base64 Encode / Decode
Encode text to Base64, or decode it back.
Tool Panel
Processed locallyAbout Base64 Encode / Decode
Base64 represents binary data with 64 printable characters, so binary can travel through text-only protocols. Encode: encodes any data into strings of the 64 characters A-Z, a-z, 0-9, + and / Decode: restores the original data from a Base64 string URL-safe mode: replaces + with -, / with _, and drops the = padding
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Encodes through UTF-8 first, so Chinese text and emoji survive the round trip.
- 2
Encode and decode live on the same page and update as you type.
- 3
Invalid Base64 raises an error instead of quietly returning mojibake.
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Paste text or Base64
Type text to encode, or paste a Base64 string to decode.
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Pick the direction
Switch encode/decode at the top; the result updates as you type.
- 3
Copy the result
One copy button above the output pane.
The input is turned into UTF-8 bytes with TextEncoder before encoding, and reversed on the way back — not processed character by character.
No. It is an encoding anyone can reverse, so do not use it to protect anything sensitive.
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Turn a binary string back into readable text.
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Convert a hexadecimal string back to text.
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