Runs locally in your browser
Convert images to Base64 and decode Base64 back to images instantly. Copy data URIs, raw Base64, HTML img tags, or CSS snippets without uploading files to a server.
Image to Base64 conversion turns binary image bytes into plain text. A Base64 image is easy to embed in HTML, CSS, JSON, Markdown, email templates, API payloads, and single-file prototypes. Use a Base64 image when portability, inline delivery, or copy-ready code matters more than separate file caching.
This image Base64 converter runs in the browser and does not require an upload endpoint. Your image file, Base64 string, decoded image preview, data URI, and generated HTML img tag stay on your device.
Use Image to Base64 when you need a copy-ready string for an API request, email template, embedded icon, CSS rule, or standalone HTML document. Switch to Base64 to Image when you need to verify a payload, inspect a data URI, decode a Base64 image, or download the original image represented by Base64 text.
Create browser-ready data:image/...;base64 URLs for HTML, CSS, JSON, and documentation.
Copy just the encoded Base64 payload for APIs, databases, config files, and tests.
Paste a complete HTML img tag with a Base64 data URI into markup or email templates.
Convert Base64 to Image, preview the decoded image, and download it as a file.
Base64 encoding represents binary data using readable ASCII text. For images, Base64 converts PNG, JPG, JPEG, WebP, GIF, SVG, BMP, ICO, or AVIF bytes into a text string. A complete Base64 image data URI starts with a MIME type such as data:image/png;base64, followed by the encoded image data.
The Base64 to Image mode reverses the workflow. Paste raw Base64, a data URI, or an HTML img tag, then decode Base64 to an image preview. This helps verify API responses, email assets, database fields, CSS data URIs, and copied Base64 image strings.
Use Image to Base64 when you need a copy-ready string for an API request, email template, embedded icon, CSS rule, or standalone HTML document. Switch to Base64 to Image when you need to verify a payload, inspect a data URI, decode a Base64 image, or download the original image represented by Base64 text.
Upload an image and the Image to Base64 output appears immediately without a server-side upload.
Copy a full data URI, raw Base64, HTML img tag, or CSS background image snippet.
Paste Base64, decode Base64 to Image, inspect MIME type, preview the result, and download the decoded file.
See file name, image type, source size, dimensions, output length, and estimated decoded size.
The conversion uses browser APIs, so private screenshots and internal assets remain local.
Dedicated language URLs, hreflang, localized metadata, FAQ schema, HowTo schema, and llms.txt help search engines and AI answer engines understand the tool.
A Base64 image can be used anywhere a browser accepts a URL. The most common patterns are HTML img src, CSS background-image, JSON fields, Markdown documents, and small inline SVG or PNG assets. For larger images, prefer a normal file URL so the browser can cache it.
<img src="data:image/png;base64,..." alt="Base64 image">background-image: url("data:image/webp;base64,...");{ "image": "data:image/jpeg;base64,..." }Base64 encoding usually increases image payload size by about 33 percent before compression. A small Base64 icon can reduce an extra HTTP request, but a large Base64 photo can make HTML, CSS, JSON, or email content heavier. Always compare the Base64 size, browser caching needs, Core Web Vitals, and how often the image changes.
Convert PNG to Base64, JPG to Base64, WebP to Base64, GIF to Base64, SVG to Base64, BMP to Base64, ICO to Base64, and AVIF to Base64.
Decode Base64 image strings, data URI images, HTML img Base64 code, CSS Base64 backgrounds, and API image payloads.
Use a data URI when the browser needs MIME type information; use raw Base64 when an API or database stores only the encoded payload.
Base64 images can make email templates and single HTML files more portable, but many email clients have size and rendering limits.
Inline Base64 can reduce requests for tiny assets, while external images usually perform better for large or reusable files.
Base64 is encoding, not encryption. Do not treat a Base64 image as hidden or protected data.
Use Base64 images for tiny icons, one-off embedded assets, tests, documentation, email snippets, and self-contained demos. Avoid Base64 for large photos, frequently reused assets, responsive images, SEO-critical product images, or files that should benefit from browser caching and CDN optimization.
| Image size | Recommendation |
|---|---|
| Under 2 KB | Excellent for icons, badges, tiny SVGs, and small UI assets. |
| 2 KB to 10 KB | Good for email assets, CSS icons, small embedded images, and quick prototypes. |
| 10 KB to 50 KB | Use selectively when portability is more important than page weight and caching. |
| Over 50 KB | Usually better as an external image file with CDN delivery and browser caching. |
Yes. Image to Base64 and Base64 to Image conversion happens in your browser with client-side APIs. The selected image and pasted Base64 string are not uploaded to a server.
You can copy a complete data URI, the raw Base64 string, an HTML img tag, or a CSS background-image snippet.
Yes. Paste raw Base64, a Base64 data URI, or an HTML img tag with a Base64 src, then preview and download the decoded image.
The tool supports image formats your browser can read, including PNG, JPG, JPEG, WebP, GIF, SVG, BMP, ICO, and AVIF.
No. Base64 encoding normally increases the payload by about one third. It is useful for portability and inline embedding, not for image compression.
Base64 is best for small icons, logos, email assets, JSON payloads, test fixtures, and self-contained HTML files. Larger images are usually better served as external files.
No. Base64 is a reversible encoding format. Anyone can decode Base64 back to image data, so it should not be used to hide sensitive information.
Yes. Copy the CSS background output and paste it into background-image: url("data:image/...;base64,...").