The short answer
Why use Image to Base64?
Encoding by hand means running a command line tool and then adding the MIME prefix yourself. Here the prefix comes from the file type and the string is ready to paste.
There is nothing to set. After Apply changes, the full string appears in the result box: a PNG starts with data:image/png;base64, and a JPEG with data:image/jpeg;base64, followed by the encoded bytes. Copy text puts it on your clipboard, and Download result saves the same string as a .txt file.
An inlined image cannot be cached on its own. It travels inside every page or stylesheet that holds it, and it is a third heavier than the file. That is fine for small icons of a few kilobytes, though many email apps, Gmail included, do not show data: images, so link signature logos instead. A 2 MB photo, on the other hand, turns into roughly 2.7 MB of text in your HTML. Shrink big pictures before you encode them.
Use Compress Image or Resize Image first when the file is large, and Image Converter if you want a WebP or PNG version encoded instead. Image to Text is a different job: it reads the words shown in a picture rather than encoding the file.
Where Image to Base64 fits
Single-file pages
Put a small logo inside a saved HTML page or report so it shows with no separate image file.
CSS icons
Put a tiny icon inside a stylesheet with url() to save one extra request.
API test payloads
Paste an image as Base64 into a JSON body when testing an upload endpoint.
Start to finish
How to use Image to Base64
- 01Tap Choose image and pick the file, or use Paste from clipboard.
- 02Tap Apply changes and wait for the data:image string to fill the result box.
- 03Tap Copy text to paste it into your code, or Download result for a .txt file.
What to expect from Image to Base64
| Check | What it means here |
|---|---|
| Supported input | JPEG, PNG, WebP, GIF, BMP, SVG and browser-supported AVIF images |
| Main controls | The file name, password, mode, or permission the tool needs |
| Output | A downloaded file, copied text, a live preview, or a print dialog |
| Working limit | 50 MB per image or 100 MB per document; camera and screen tools depend on browser permission |
Image to Base64 tips
- The text is about a third larger than the image file.
- Keep inlined images to a few kilobytes; big photos bloat your HTML.
- The string already includes the data: prefix, so paste it as is.
- Run Compress Image first if the file is over a few hundred kilobytes.
Image to Base64 FAQ
Something missing? Ask us.
Does the Base64 string change the image?
Why is the text bigger than the image?
Can I paste it into an img tag?
Does Image to Base64 upload my file?
Is Image to Base64 free to use?
Why did Image to Base64 fail or look wrong?
Related tools
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