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Base64 encoding turns a binary file, like an image, into a plain-text string. That string can be embedded directly in HTML, CSS, JSON, or a data URI — no separate image request needed.
This converter reads your image in the browser and returns its Base64 data URI instantly. Nothing is uploaded, so it's safe for private assets. Note that Base64 is ~33% larger than the raw file, so it suits small icons, not large photos.
Embed a tiny logo or icon in CSS/HTML to save an HTTP request.
Some email workflows need images inlined as data URIs.
Ship a small image inside a JSON payload or config file.
For large images. Base64 inflates size by ~33% and can't be cached separately, so big photos load slower inline than as normal files.
No. The file is read and encoded locally in your browser — nothing is sent to a server.
A string like data:image/png;base64,XXXX that embeds the file inline. Browsers treat it as if it were a real image URL.
Yes — paste a data URI into an image src, or use a Base64 decoder. This tool focuses on encoding.