1
Choose text or file
Type or paste text, or choose a file to turn into Base64. Nothing is uploaded.
Developer Tools
Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 back, entirely in your browser.
Encode text or a file into Base64, or decode Base64 back into text or a downloadable file, entirely on your device. Working with percent-encoded URLs instead? Try the URL Encoder / Decoder.
Your text and files never leave your device. Encoding and decoding happen entirely in your browser.
Base64 is an encoding, not encryption: anyone can decode it. Text is converted to and from UTF-8.
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How it works
Private Base64 encoding and decoding in your browser
2
Encode or decode
Pick Encode or Decode, and optionally URL-safe output, padding or line wrapping.
3
Copy or download
Copy the result, or download decoded data as a file with the name you choose.
Use cases
When this comes in handy
Embed a small image
Turn an icon into a data URI you can paste straight into CSS or HTML.
Inspect an encoded value
Decode a Base64 string from an API response, config file or email header to read it.
Prepare URL-safe tokens
Produce Base64URL output without + / or padding characters for use in links and tokens.
FAQ
Common questions
Is my text or file uploaded anywhere?
No. Encoding and decoding run entirely in your browser; nothing is sent to a server.
Is Base64 a form of encryption?
No. Base64 is only a way to write binary data as text. Anyone can decode it, so it does not protect secrets.
Does it handle Unicode and emoji?
Yes. Text is encoded as UTF-8 before it is converted to Base64, and decoded back as UTF-8. If decoded bytes are not valid UTF-8 text, you will see a message and can download them as a file instead.
What does URL-safe Base64 mean?
The URL-safe variant (Base64URL) uses - and _ instead of + and /, so the result can be used in URLs and filenames. When decoding, either alphabet is accepted, with or without padding.
Is there a file size limit?
File encoding is limited to 25 MB, because Base64 text is about a third larger than the original and must fit in your browser's memory.
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