Image to Base64
FreeConvert images to Base64 encoded data URI strings
About Image to Base64
Embedding a small image directly in your code as a data URI saves an HTTP request and keeps an icon or logo bundled with the markup or CSS that uses it. To do that you need the image as a Base64 string, which you cannot produce by hand. This tool reads an image file and returns its Base64-encoded data URI, ready to drop into an img tag, CSS background, or JSON field.
Upload an image and the converter encodes its bytes into Base64 and prepends the correct data URI prefix for its type. It is free, runs in your browser, needs no signup, and returns the string instantly. Because every 3 bytes become 4 characters, the encoded string is larger than the file, so this is best for small assets like icons rather than large photos.
Common uses
- Inlining a small icon or logo as a data URI to avoid an extra request
- Embedding an image directly in CSS as a background
- Putting an image into a JSON payload or config as a string
- Bundling a tiny graphic inside an HTML email
- Storing a small image in a database field as text
How to use
- 1
Upload your file
Click the upload area or drag & drop your file. Supports *. Up to 50 MB.
- 2
Click "Process — Image to Base64"
Click the process button. Your file is converted instantly on our secure servers.
- 3
Download your result
Preview and download your converted file. No watermarks, no quality loss, no expiry.
Base64 Data URL encodes images as text strings — embed directly in HTML, CSS, or JSON without separate file requests.
Why ToolHub?
- Accurate conversion
- Multiple formats
- Instant results
FAQ
Does the output include the data URI prefix?
Yes. It includes the data: prefix with the correct MIME type so you can use the string directly in src or CSS.
Should I use this for large images?
It is best for small assets. Base64 inflates size by about a third, and large inlined images bloat your files and slow parsing.
Which formats are supported?
Common image types like PNG, JPG, GIF, and SVG can be encoded, with the MIME type set from the uploaded file.
Is my image uploaded to a server?
Encoding happens in your browser, so the image is processed locally rather than sent away.
What is a Base64 image?
A Base64 image is an image encoded as a text string (data URL). It can be embedded directly in HTML src attributes, CSS backgrounds, or JSON without a separate file request.
When should I use Base64 instead of a regular image URL?
Use Base64 for small images (icons, tiny logos) to reduce HTTP requests. For large images, use regular URLs — Base64 increases file size by ~33%.
What image formats can be converted to Base64?
All common formats: JPG, PNG, WebP, GIF, SVG, BMP, TIFF and more.
How do I use the Base64 output in HTML?
Use it as: <img src="data:image/png;base64,YOUR_BASE64_STRING"> or in CSS as background-image: url(data:image/png;base64,...).
Can I use Image to Base64 on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.