Image to Base64
Convert images to Base64 data URLs for embedding in HTML or CSS.
About this tool
Convert images to Base64 data URLs for embedding in HTML or CSS. Handy for auth debugging, test fixtures, and moving data between transport formats like Base64, URL encoding, and tokens.
Select an image file from your device. Encode it to a Base64 data URL in the browser. Example — Tiny PNG as data URL: try `(upload 1×1 PNG)` and expect something like `data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAB…`.
Large images produce huge strings that can slow editors and exceed header size limits. See also: Base64 Encoder/Decoder, and Favicon Generator. Runs in your browser — nothing you paste gets uploaded.
How to use
- Select an image file from your device.
- Encode it to a Base64 data URL in the browser.
- Paste the result into HTML <img src>, CSS backgrounds, or fixtures.
- Prefer external files for large assets — data URLs inflate payload size.
Example
Tiny PNG as data URL
Input
(upload 1×1 PNG)
Output
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAB…
Limitations
- Large images produce huge strings that can slow editors and exceed header size limits.
- Processing stays in-memory in your tab — extremely large files may fail.
- Does not optimize or recompress the image before encoding.
Related guides
1Related tools
2Frequently asked questions
What does the Image to Base64 do?
Convert images to Base64 data URLs for embedding in HTML or CSS. Runs in your browser — no install, no account.
How do I use the Image to Base64?
Select an image file from your device. Encode it to a Base64 data URL in the browser. Paste the result into HTML <img src>, CSS backgrounds, or fixtures. Prefer external files for large assets — data URLs inflate payload size.
Is the Image to Base64 free?
Yes. No signup, no usage limits, no paywall.
Does the Image to Base64 upload my data?
No. Processing happens locally in JavaScript. Your input is not uploaded, stored, or logged.
What are the limitations of the Image to Base64?
Large images produce huge strings that can slow editors and exceed header size limits. Processing stays in-memory in your tab — extremely large files may fail. Does not optimize or recompress the image before encoding.