Base64 Encoder & Base64 Decoder
Base64 encoder and Base64 decoder in your browser. Encode text or files to base64 and decode base64 back to text or download.
How to use the Base64 Encoder/Decoder
- 1Pick Encode or Decode.
- 2Paste your text — or upload a file to encode.
- 3The result updates instantly in the right pane.
- 4Click Copy to grab the output.
What you can do with the Base64 Encoder/Decoder
Encode text to Base64.
Convert any UTF-8 string to a safe Base64 representation for URLs, emails, or APIs.
Decode a Base64 string.
Paste a Base64 blob and instantly see the original text.
Encode a file to Base64.
Turn an image, PDF, or small binary into a Base64 string for inline embedding in HTML, CSS, or JSON.
Decode a Base64 data URL.
Paste a data:* URL and recover the original payload.
Base64 for JWT debugging.
Decode each segment of a JSON Web Token to inspect the header and payload.
Base64 Encoder/Decoder FAQs
Is my data uploaded anywhere?+
No. Encoding and decoding both happen entirely in your browser. Nothing is sent to a server.
Is Base64 encryption?+
No. Base64 is encoding, not encryption — anyone with the string can decode it. Never use it to hide secrets.
Why does my Base64 string end with = or ==?+
Those are padding characters that round the output to a multiple of 4. They're part of the standard and required for valid decoding.
Does Base64 make files bigger?+
Yes, by about 33%. That's the trade-off for being text-safe in URLs, emails, and JSON.
Can I decode any Base64 string?+
Only valid Base64. If the input has invalid characters or wrong padding, decoding fails and the tool tells you.
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