File to Base64
Encode any file as raw Base64 or a MIME-aware data URL for APIs, HTML, CSS, and portable text payloads.
Choose a file to encode
Convert its bytes to Base64 or a ready-to-use data URL
Any file type, up to 20 MB
Encode binary files as text
Base64 makes arbitrary file bytes safe to place in text-oriented formats. Choose raw Base64 for an API field or select Data URL when the receiving browser needs the media type and encoding prefix.
Encoding is reversible and is not encryption or compression.
Frequently Asked Questions
What is the difference between raw Base64 and a data URL?+
Raw Base64 contains only encoded bytes. A data URL adds the MIME type and encoding prefix so browsers can use the value directly.
Why is the Base64 output larger than the original file?+
Base64 represents binary data with text characters and usually increases the size by roughly one third.
Should large files be embedded as data URLs?+
Usually not. Data URLs are best for small assets; normal files and URLs are more efficient for larger content.