Image to Base64 Converter
Convert images to Base64 strings and back, entirely in your browser.
Drop an image here or click to select
About Image to Base64 Converter
Convert images to Base64-encoded strings for embedding in HTML, CSS, or JSON, or decode a Base64 string back into a downloadable image. All processing happens locally in your browser.
What Is This Tool?
Convert any image into a Base64-encoded text string, or decode an existing Base64 string back into a viewable, downloadable image — all done locally in your browser with no upload to any server.
How to Use
- Drag and drop an image onto the dropzone, or click it to select a file.
- The Base64 string appears automatically — click Copy to use it in your code.
- To go the other way, paste a data:image/... Base64 string into the text box and click Preview.
- Click Download to save the previewed image to your device.
Common Use Cases
- Embedding small images directly into HTML or CSS without extra HTTP requests
- Including images in JSON payloads or email templates
- Quickly inspecting what a Base64 image string actually looks like
- Debugging data URIs in API responses
Tips & Tricks
- Base64 encoding increases file size by about 33% — best for small icons, not large photos.
- The output includes the full data:image/... prefix, ready to paste directly into an <img> src attribute.
Frequently Asked Questions
Why would I want to convert an image to Base64 instead of just linking the file?
Embedding an image as Base64 avoids a separate HTTP request, which is useful for small icons or inline images bundled directly into HTML, CSS, or JSON where an extra network round-trip isn't worth it.
Is Base64 encoding a good idea for large photos?
Not generally. Base64 increases file size by about 33% and prevents the browser from caching the image separately, so it's best reserved for small assets like icons or logos rather than full-size photographs.
What does the data:image/... prefix mean?
It's a data URI scheme that tells the browser the following string is inline image data and specifies the MIME type (e.g., image/png), so browsers know how to render it directly without a separate file.
Can I preview an image from a Base64 string I already have?
Yes. Paste the full data:image/... string into the decode text box and click Preview to render it, then use Download to save it as a regular image file.
Are my images uploaded when I convert them?
No. Encoding and decoding both happen locally in your browser — no image data is sent to any server.
Convert images to Base64 strings and decode Base64 back to images, entirely in your browser. Free, fast, and no upload required.