Image to Base64
Convert images to Base64 data URIs or decode Base64 back to images. Get HTML img tag, CSS background and raw Base64 string.
Drag & drop image here
PNG · JPG · WebP · GIF supported
What is Image to Base64?
An image to Base64 converter encodes binary image files into a text-based Base64 string that can be embedded directly inside HTML, CSS, JavaScript, JSON, or XML documents without requiring a separate HTTP request to load the image. The reverse operation — Base64 to image — decodes a data URI back to a downloadable image file, which is useful for inspecting embedded assets extracted from source code or API responses.
Base64 encoding represents binary data using 64 printable ASCII characters. Because image data is binary, it cannot be safely embedded in text-based formats without encoding. A data URI combines the Base64 string with a MIME type prefix — for example, 'data:image/png;base64,...' — to form a self-contained image reference that browsers, email clients, and PDF renderers understand natively.
Common use cases include embedding small icons and logos directly in CSS to eliminate HTTP requests and reduce latency, encoding images for use in HTML email templates where external image hosting is unreliable, storing images inline in JSON API payloads, and embedding images in SVG files. This tool generates the full data URI alongside ready-to-use HTML 'img' tag and CSS 'background-image' snippets so you can copy and paste directly into your code without manually constructing the syntax. All encoding runs in the browser using the FileReader API — your images never leave your device.
How to Use Image to Base64
- Upload an image or paste Base64
Drop an image file to encode it, or paste an existing Base64 string into the text area to decode it back to an image.
- Review the output
See the full Base64 data URI, the encoded string length, and a live preview of the image.
- Copy the code snippet
Choose from ready-made HTML img tag, CSS background-image, or raw data URI snippets and copy with one click.
- Decode and download
When decoding, click "Download" to save the Base64 data as an image file to your device.
Key Benefits
Embed small images inline to remove the network round-trip, which can speed up initial page load for icon-heavy interfaces.
HTML img tag, CSS background-image, and raw data URI snippets are generated automatically — just copy and paste.
Convert images to Base64 or paste a data URI to decode it back to a downloadable image file.
The FileReader API handles all encoding in your browser — image data is never sent to any external server.
Frequently Asked Questions
Use Base64 for small images under 10 KB such as icons, logos, and data URI backgrounds in CSS. For larger images, external files are more efficient because Base64 increases file size by about 33%.
Yes. Base64 encoding expands binary data by approximately 33% compared to the original binary file size. This trade-off is acceptable for small assets but makes large images inefficient.
Some email clients support data URIs in img tags, but support is inconsistent — notably Gmail strips them. Inline CSS background-image data URIs are generally better supported for HTML email.
Any image format the browser can read can be encoded: JPEG, PNG, WebP, GIF, SVG, BMP, and ICO. The MIME type is automatically detected from the file and included in the data URI prefix.