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Image to Base64

Convert images to Base64 data URIs for inline embedding.

Drop an image and get its Base64 data URI, ready to paste into HTML <img src>, CSS background-image, or a JSON field. Works for PNG, JPG, GIF, WebP, SVG, AVIF, and BMP — anything your browser can read.

Common use cases: inlining tiny icons to save a network request, embedding images in email templates, packing small assets into a single HTML file for a one-page prototype, and including images in JSON payloads sent to APIs that don't accept multipart uploads.

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Base64

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Frequently asked questions

What's a "data URI" and when should I use one?
A data URI embeds the image bytes directly in the HTML/CSS as a Base64 string — no separate network request needed. Best for tiny icons, single-use background images, and email templates where external images get blocked. For anything more than a few KB, a regular file reference loads faster.
Does the file get uploaded anywhere?
No. The image is read locally via the browser's FileReader API and encoded in memory. Nothing is uploaded — safe for sensitive screenshots and internal assets.
Why is the Base64 string ~33% larger than the file?
Base64 encodes 3 binary bytes as 4 ASCII characters, so the encoded size is always ~133% of the original. Gzip compression reclaims most of that when the response is compressed, but the in-memory and on-disk cost of the encoded form is still larger.
Which formats are supported?
Anything the browser can read: PNG, JPG, JPEG, GIF, WebP, SVG, AVIF, and BMP. The encoded output works wherever data URIs do — <img src>, CSS background-image, inline email, JSON payloads.

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