Image to Base64 Converter

Outputs for real implementation work

Raw Base64 is useful for APIs and storage fields. A data URL includes the media type and can be placed in an image source. The HTML and CSS outputs are paste-ready snippets, so you do not need to rebuild the prefix or escape the value by hand.

The metadata compares the original byte count with the Base64 character count and reports the percentage increase. Base64 normally expands binary data by roughly one third before the data URL prefix or surrounding markup is added.

When embedding an image is appropriate

Data URLs can be convenient for small icons, self-contained prototypes, test fixtures, and API payloads. They are usually a poor fit for large photographs because the encoded text is larger, cannot be cached as a separate file, and makes HTML or CSS harder to inspect.

The conversion runs locally and preserves the original image bytes. It does not recompress, resize, strip metadata, or make an unsafe image safe. Optimize the source first if output size matters.

Common failures this tool explains

• The selected file is not reported as an image by the browser.
• The image is so large that keeping both bytes and encoded text exhausts tab memory.
• A data URL is copied where an API expects raw Base64 only.
• HTML or CSS markup is used without checking the source image MIME type.

Equivalent commands

Use the runtime or shell already available in your workflow. Validate untrusted input and keep binary output out of terminals when it may contain control bytes.

from pathlib import Path
import base64
value = base64.b64encode(Path('image.png').read_bytes()).decode('ascii')

import { readFileSync } from 'node:fs';
const value = readFileSync('image.png').toString('base64');

base64 --wrap=0 image.png > image.base64.txt