Base64 File Encoder
Encode any file to a Base64 string or data URI.
Processed locally in your browser. Your file is never uploaded.
- Outputs both the raw Base64 and a complete `data:` URI with the right MIME type.
- The file is read in your browser — nothing is uploaded.
- One less network request for a small embedded asset.
Why this is private
- Processed locally in your browser. Your file is never uploaded.
- Open your browser's DevTools → Network tab while using this tool — you won't see a request carrying your input, because it never leaves your device.
- Nothing you enter is uploaded to a server or shared with us — the processing happens entirely on your device.
Overview
Encodes any file — images, fonts, small documents — into a Base64 string or a ready-to-use data: URI you can embed directly in HTML or CSS.
How to use it
- 1Drop a file.
- 2Copy the Base64 string or the full data URI.
- 3Toggle between the two formats.
Tips
- Data URIs are convenient for small assets, but embedding large files this way bloats HTML/CSS and skips browser caching — keep it to small icons or fonts.
Frequently asked questions
What people use it for
Inline a small icon or SVG in CSSEmbed it in `background: url(...)` so it ships with the stylesheet.
Bundle a font into a single fileBase64 a small woff2 when you can't add another asset.
Embed an image in an HTML emailSome contexts need the image inside the markup, not linked.
Prototype without a serverDrop an asset straight into a single HTML file.
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Related tools
All developer toolsBase64 EncoderEncode text to standard or URL-safe Base64.Base64 DecoderDecode Base64 strings back to text, images or files — including JWTs and data URIs.JSON Viewer & FormatterView, format, validate, edit and beautify JSON with an interactive tree view, plus a shareable link.JSON ValidatorValidate JSON syntax and pinpoint errors instantly.
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Base64 File Encoder