Image to Base64 Converter

Encode images locally in your browser to URI schemas, CSS background tags, or HTML assets.

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Drop your image here

PNG, JPG, SVG, WebP, GIF · max 10 MB

Base64 to Image Decoder

Paste a raw Base64 string or URI schema data block to preview and decode it back to its original file.

How It Works

Select Asset

Select or drop any image file.

Convert Local

Perform encoding completely offline.

Copy String

Instantly copy Data URL or Base64 code.

FAQ

What is a Data URL?

A Data URL is a URI scheme that allows data to be embedded in-line in web pages. It starts with 'data:' followed by the MIME type and the Base64-encoded string.

Does UtilVox store my images?

No. All conversions happen locally in your browser's memory. Your files never leave your computer, ensuring total privacy and security.

Will Base64 improve my SEO?

It depends. While reducing HTTP requests can improve site speed, excessive Base64 use can bloat your CSS/HTML and slow down parsing. Use it surgically for icons and small UI assets.

Embedding Images as Text

Where Base64 images belong

A Base64 data URI puts the image inside the code instead of next to it:

Use	Why embed	Size guideline
CSS icons and tiny logos	One less HTTP request	Under ~5 KB
Inline images in HTML email	Some clients block external images	Small images only
Images inside JSON/API payloads	JSON can't carry raw binary	As small as practical
Self-contained HTML file	Single file works offline	Whatever the file needs
Quick prototypes and demos	No asset hosting needed	Anything, temporarily

The trade you're making

Base64 inflates the image by about 33%, and embedded images can't be cached separately — every page load re-downloads them inside the document. That's why the technique suits small, rarely-changing images and hurts on photos. The practical rule: under a few kilobytes, embedding is free convenience; over ~20 KB, a normal image URL almost always serves users better.

Shrink first, embed second

Since every embedded byte costs 1.33 bytes, run images through the compressor (and resize to display size) before encoding. WebP via the converter shrinks the payload further where support allows. For decoding strings back, or encoding non-image data, the general Base64 tool handles raw text both directions.