How do I embed Base64 image in HTML?

Use: . Replace {your-base64-string} with your encoded image.

When should I use Base64 in HTML?

Use Base64 for small icons, critical above-the-fold images, or when you need a single-file HTML document. Avoid for large images.

Can I use Base64 for responsive images?

Yes, but it is not recommended for large images. Base64 is best for icons, logos, and small graphics that appear on every page.

Is this tool free to use?

Yes. There is no charge, no account, and no watermark on the output. Everything is processed locally in your browser, so your files never leave your device. This keeps your data private and avoids waiting for server processing.

HTML Base64 Encoder — For Html

HTML Base64 Encoder

Inline Base64 in HTML is perfect for small, critical above-the-fold images and single-file pages with zero extra requests. Use our tool to generate the Base64 instantly.

Why it matters: Inline Base64 in HTML is perfect for small, critical above-the-fold images and single-file pages with zero extra requests.

How to convert an image to Base64 (and back)

1Choose Encoder to turn an image into Base64, or Decoder to turn a string back into an image.
2Pick your output — raw, URL-safe, no-padding, or wrapped — and decide whether to include the data: prefix.
3Copy to clipboard or download as a file. Everything runs locally — nothing is uploaded.

Best settings for this page: Upload an image, choose your output format, and copy or download the result.

All processing runs locally in your browser. Your images and strings are not uploaded to any server.

Base64 basics: size, data URIs, and when to use it

Size trade-off — Base64 inflates binary data by about 33%. It is best for small assets (icons, logos) and single-file pages; for large images, external files with caching are faster.

Data URI — a data URI is raw Base64 prefixed with a MIME type, e.g. data:image/png;base64,.... Include the prefix for HTML/CSS; store raw Base64 for JSON or databases.

URL-safe — RFC 4648 §5 swaps + and / for - and _ and drops padding, making the string safe for URLs, JWTs, and filenames.

Use it for embedding images in code, email, and APIs where an extra HTTP request is worse than the size cost.

Frequently Asked Questions

All Base64 Tools

Encode or decode images to and from Base64 — pick a tool:

Encode

Image to Base64 Encoder PNG to Base64 JPG to Base64 WebP to Base64 SVG to Base64 GIF to Base64 ICO to Base64 Converter BMP to Base64 AVIF to Base64 TIFF to Base64

Decode

Base64 to Image Decoder Base64 to PNG Decoder Base64 to JPG Decoder Base64 to WebP Decoder Base64 to GIF Decoder Base64 to SVG Decoder Base64 to ICO Decoder Base64 to BMP Decoder

Features

HTML Favicon Embed URL-Safe Base64 Encoder Data URI Generator

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Image Compressor Image Converter Image Resizer Favicon Generator

HTML Base64 Encoder

Output Settings

Image Preview

Base64 Output

Paste Base64 String

Decoded Image

Related reading

HTML Base64 Encoder

How to convert an image to Base64 (and back)

Base64 basics: size, data URIs, and when to use it

Frequently Asked Questions

All Base64 Tools

Encode

Decode

Features

More Tools

Related Tools