Image to Base64

Convert images to Base64 strings and Base64 to images. Client-side only.

Drop an image here or click to browse

Bidirectional

Image to Base64 and Base64 to Image.

Live Preview

See the image as you paste Base64.

Download

Download decoded image directly.

Client-side

All processing in your browser. No data uploaded.

About Image to Base64

Need to embed an image directly into your CSS or HTML file to reduce HTTP requests? Our Image to Base64 Converter is the perfect tool for front-end developers aiming to optimize page load speeds. Simply drag and drop any image (PNG, JPG, SVG, or GIF), and our tool will instantly generate a raw Base64 string along with ready-to-use CSS background code and HTML image tags. Everything happens securely within your browser, ensuring your private images are never uploaded to our servers.

How to Use Image to Base64

Select the "Image → Base64" tab to encode an image, or "Base64 → Image" to decode a Base64 string.
To encode: drag an image file onto the upload zone or click to browse. The Base64 data URL appears immediately.
Click the "Copy" button to copy the full Base64 string (including the data URI prefix) to your clipboard.
To decode: paste a Base64 string (with or without the data:image/... prefix) into the text area.
A live preview of the decoded image appears as you type or paste.
Click "Download Image" below the preview to save the decoded image to your device.

Frequently Asked Questions

What is a Base64 data URL?

A Base64 data URL encodes binary data as ASCII text. For images, it looks like data:image/png;base64,iVBOR... and can be used directly as the src attribute of an <img> tag.

Should I use Base64 images on my website?

Only for very small images (under ~5 KB). Base64 encoding increases file size by ~33% and prevents browser caching, so it is not recommended for large images.

Does the tool support all image formats?

Yes. Any image your browser can render — JPEG, PNG, WebP, GIF, SVG, BMP — can be encoded to Base64.

Are my images sent to a server?

No. The FileReader API processes your image locally in the browser. Your image data never leaves your device.

Why is my Base64 string so long?

Base64 encoding expands binary data by approximately 33%. A 100 KB image will produce a Base64 string of about 133 KB. For large images, consider using a hosted URL instead.

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