Base64 Encoder and Decoder
Convert text (UTF-8) or a file to Base64, and decode a Base64 string, URL-safe variant included.
Processed in your browserFree
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About this tool
Encode text to Base64 (accents and emoji included thanks to UTF-8) or decode a Base64 string received from an API, an email or a configuration file. Also convert a file (image, font, PDF) into a Data URI ready to paste into HTML or CSS. The URL-safe variant and wrapping into 76-character lines are supported.
How to use this tool
- 1Choose encode or decode.
- 2Paste the text (or drop a file to get a Data URI).
- 3Copy the result.
Limits to know
- Base64 is not encryption: it protects nothing, it carries bytes as text.
- Files up to 5 MB for Data URI conversion (the result is 33% larger than the original).
- Accepted formats
- Text
- Maximum size
- 2 MB
Privacy and file processing
Data is processed in your browser and is never sent to a server.
Read our privacy policyFrequently asked questions
No. It is a reversible encoding that represents bytes as text, not encryption: anyone can decode it. To protect a document, use a password or an encryption tool.
It replaces "+" and "/" with "-" and "_" (and often omits the trailing "=") so it can be used in a URL or a file name. The tool decodes both variants.