Base64 converts binary data into 64 printable ASCII characters so files, images, and keys can travel safely through text-only systems. Here's how it works, step by step.
Base64 turns binary data into ASCII text — handy for data URIs, JWTs, and email attachments, useless for "encryption". Learn the real use cases, the 33% size overhead trap, and decode anything in seconds.
Calculate dimensions and aspect ratios for images and video.
Apply CSS filters like grayscale, sepia, and blur to images.
Create organic blob shapes for backgrounds.
Generate smooth wave dividers for your website.
Encode an image to a Base64 data URL, or decode Base64 back into a viewable image.
Add image or text watermarks to your photos.
When working with URLs, always encode special characters to avoid breaking the link. A URL Encoder/Decoder is a must-have tool for web developers.
Optimize your web assets. Convert SVG files into Data URIs instantly. Embed icons directly into your CSS or HTML to reduce HTTP requests and speed up page loads.
Every external image on a website requires a separate network request. Data URIs let you embed small images (like icons) directly into your code as a text string, saving those requests and making your site snappier.
A Data URI is a base64 or URL-encoded string that represents a file. The browser reads this string and reconstructs the image on the fly, without needing to fetch a separate file from the server.
For small icons (under 2-3KB), yes! It saves a request. For large headers, stick to a file to keep your CSS light.
That 'gibberish' is the encoded data. Your browser knows how to turn those `%3Csvg...` codes back into a picture.
Yes, Data URIs are supported by all modern web browsers.
All calculations and data processing for this tool are performed locally in your browser. UtilToolkits does not send any of your data to an external server, ensuring your information remains private and secure.
Drag & drop your file here
or click to browse
.svg,image/svg+xml · max 5 MB · paste with Ctrl/Cmd+V
Smallest output for CSS url() — only escapes characters that would break.