SVG to Base64 Converter (Data URI)
Convert an SVG to Base64 or generate a full SVG data URI for HTML, CSS, and JavaScript. This tool is built for practical embedding workflows: you feed it SVG, choose an output format, and it produces a copy-ready string that you can paste into your codebase. The most common output starts with data:image/svg+xml;base64, followed by the encoded SVG. Everything runs locally in your browser, so your SVG is not uploaded.
<img src="..." />, demos, or documentation snippets.background-image: url("...") for icons and UI patterns.Outputs you can generate
1) Data URI (Base64)
Produces a full data: URL that you can paste directly into src, href, or CSS url(). This is the least surprising option for mixed environments because it avoids special character issues and tends to survive copy/paste across tools.
2) Base64 only
Produces just the encoded payload without the data:image/svg+xml;base64, prefix. This is useful when your app adds the prefix at runtime, when you store only the payload in a database/config, or when you need to compare or hash the output consistently.
3) Data URI (UTF-8)
Produces a URL-encoded UTF-8 data URI, not Base64. For small, simple icons, this can be smaller than Base64 and remains readable. For CSS, the CSS-safe mode escapes additional characters that frequently break url() or get interpreted as CSS syntax.
url("...") and prefer UTF-8 CSS-safe or Base64 if your pipeline is strict.When to use this instead of the embed code generator
Use this SVG to Base64 route when the output you need is the encoded string itself: a Base64 payload, a UTF-8 SVG data URI, or a quoted snippet for HTML and CSS. It is an encoding tool, not raster conversion or image compression.
When a config, CSS rule, test fixture, JSON value, or single-file demo needs an encoded SVG string.
When you want complete HTML, inline SVG, CSS mask, object, iframe, or framework-oriented embed snippets.
How to Convert SVG to Base64
Generate a Base64 string or a data URI for your SVG in seconds.
- 1. Upload, paste, or edit your SVG source.
- 2. Choose an output format: Data URI (Base64), Base64 only, or Data URI (UTF-8).
- 3. Enable sanitizing and light minification.
- 4. Copy the result or download it as a text file.
Base64 vs UTF-8 Data URI
Base64 data URIs
Base64 is the most compatible option across browsers and tooling, but it increases output size, often about one third bigger than the original. Use it when you want fewer surprises.
UTF-8 data URIs
UTF-8 data URIs can be smaller for simple SVG icons and remain readable. For CSS usage, the CSS-safe mode escapes extra characters that may break url().
Where this is useful in real code
CSS background icons without extra requests
If you have small UI assets like chevrons, checkmarks, or badges, a data URI removes the need for separate files and avoids additional network requests.
Single-file demos and sandboxes
Data URIs are ideal when you want a self-contained HTML file that can be shared or saved offline without an assets folder.
Theme/config storage
If your app loads theme assets from JSON or a database, a Base64 payload can travel as plain text and be rehydrated into a data URI at runtime.
Quick snippets for docs and internal tools
When you need an instant, copyable snippet for documentation, issue trackers, or internal dashboards, a data URI is a fast drop-in asset.
Common Use Cases
- Embedding icons into CSS themes without separate files
- Shipping a single-file HTML demo with no asset requests
- Storing small SVGs inside JSON, configs, or localStorage
- Generating quick
<img>snippets for docs - Inlining assets for email templates or limited environments
Security Notes
SVG can contain scripts, event handlers, and risky links. If you plan to embed untrusted SVG content, keep sanitizing enabled to remove <script>, inline on* handlers, and javascript: URLs before encoding.
Troubleshooting
My CSS background-image does not render
Try Data URI (UTF-8) with CSS-safe encoding. Also confirm the URI is wrapped in quotes inside url("...").
The output is huge
Enable whitespace minification and style cleanup. For simple icons, UTF-8 mode may reduce size compared to Base64.
Preview is blank
Preview requires a full data URI. If you selected Base64-only, enable “Include prefix” or switch to a data URI output mode.
