Escape & Encode
Base64 Decode
Wrap long lines in the input and output
Base64
Paste a Base64 string to decode it to text as you type.
Text
Escape & Encode
Paste a Base64 string to decode it to text as you type.
Base64 Decode turns a Base64 string back into text. Paste a token, a data payload or the output of Base64 Encode and the text updates as you type.
Spaces, tabs and line breaks are ignored, and missing = padding is accepted. Both the standard alphabet and the URL-safe alphabet (- and _) are read in the same string. The decoded bytes must be valid UTF-8, including emoji.
Decoding runs in your browser and the text you paste is never uploaded. Swap sends the text to Base64 Encode when you need to encode it again.
It reverses Base64. Each group of alphabet characters becomes the original bytes, and those bytes are read as UTF-8 text. Use it to read a token or a payload copied from a log, an API or a URL.
No. Missing = padding is accepted. When the signs are present they must be the right number and only at the end. Spaces, tabs and line breaks are skipped.
Yes. URL-safe Base64 writes - and _ instead of + and /, and it often drops padding. This decoder accepts that form and the standard form in the same string. A character outside both alphabets is reported at that spot.
Base64 can hold any bytes, not only text. When the bytes are not valid UTF-8, the tool reports Invalid UTF-8 in the decoded bytes instead of substituting a replacement character.
No. Decoding runs in your browser and the text you paste is never uploaded, logged or stored. Google Analytics records page views and feature use, never content.
Encode any text as Base64 as you type, including emoji and accents, with a standard or URL-safe alphabet. Runs in your browser; your text is never uploaded.
Turn text into a valid JSON string literal, or decode one back to plain text.
Percent-encode text for a URL, or decode a percent-encoded string.
Escape text for HTML, or decode entities back to characters.
Escape text as a JavaScript string literal, or decode those escapes.
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