100% in your browser · files never leave your device

Image to Base64 Converter — Free & Private (In-Browser)

Convert any image to a base64 data URL in your browser. Perfect for CSS, HTML, and JSON embedding. No upload, free, unlimited.

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When to embed an image as a base64 data URL

A data URL inlines an image directly into HTML, CSS, or JSON, trading an extra network request for roughly 33% more bytes. That trade wins for small assets — icons, logos, email-template graphics, and single-file demos — and loses for hero photos, where caching a separate file is better.

This converter runs entirely in your browser: the file is read locally, base64-encoded locally, and the result is copied to your clipboard. No image is ever uploaded, which matters for unreleased product shots or personal photos.

Developers commonly paste the result into CSS background-image, an <img src>, a JSON payload, or a Markdown-embedded diagram. The reverse tab turns a data URL back into a downloadable file when you inherit embedded images from someone else's code.

How to use Image to Base64

  1. 1Drop an image onto the page, or click to browse (PNG, JPG, WebP, GIF, SVG).
  2. 2The data URL appears instantly with the detected MIME type and byte size.
  3. 3Click “Copy data URL” for the full string, or “Copy base64 only” for just the payload.
  4. 4Switch to the “Base64 → Image” tab to reverse the process at any time.

Image to Base64 FAQ

Why would I convert an image to base64?
A data URL embeds the image directly in CSS, HTML, or JSON, removing a network request. It is common for small icons, email templates, and single-file exports.
Are my images uploaded to convert?
No. The image is read and encoded entirely in your browser; the bytes never leave your device.
Does base64 make the file bigger?
Yes — base64 encoding adds about 33% overhead (3 bytes become 4 characters). Budget for that when embedding large images.
Which image formats are supported?
Any format your browser can read as a file: PNG, JPG, WebP, GIF, SVG, AVIF, and more.

Updated 26 August 2026

What is Image to Base64?

Convert any image to a base64 data URL in your browser. Perfect for CSS, HTML, and JSON embedding. No upload, free, unlimited.

  • The data URL appears with MIME type and byte size as soon as the file is read.
  • Copy the full data URL or the payload only. Expect about 33% more characters than the file.
  • The reverse tab on Base64 to Image turns a string back into a download.

How to use it

  1. Drop an image onto the page, or click to browse (PNG, JPG, WebP, GIF, SVG).
  2. The data URL appears instantly with the detected MIME type and byte size.
  3. Click “Copy data URL” for the full string, or “Copy base64 only” for just the payload.
  4. Switch to the “Base64 → Image” tab to reverse the process at any time.