Image to Base64
Convert any image file to Base64 or a data URI — locally, no upload.
The Image to Base64 tool converts any image file into Base64 text and a full data URI — the format you paste into HTML src attributes, CSS backgrounds and JSON payloads to embed an image without hosting a separate file.
Data URIs are handy for small assets: email signatures that must be self-contained, prototypes that need one-file portability, icons embedded in code, and API payloads that ship images inline. The tool shows both the raw Base64 (for JSON/API use) and the complete data:image/...;base64,... URI (for HTML/CSS), each with a copy button, plus a preview of the encoded image.
The file is read entirely in your browser — nothing is uploaded — so it is safe even for sensitive images. Remember that Base64 inflates size by ~33%, which is why data URIs suit small images only.
The file is read locally and encoded in your browser — nothing is uploaded.
How to use the Image to Base64
- Choose an image file from your device.
- Read the raw Base64 and the full data URI.
- Copy whichever form you need — HTML, CSS or JSON.
- Optionally download the Base64 as a .txt file.
- Preview confirms the encoding round-trips correctly.
Frequently asked questions
What is the difference between Base64 and a data URI?
Raw Base64 is just the encoded text. A data URI adds the prefix (data:image/png;base64,) that tells browsers what the text is — the form that works in an img src or CSS url(). This tool provides both.
When should I embed images as Base64?
For small assets (under ~10–20 KB) that must be self-contained: email signatures, single-file demos, tiny icons. For larger images the ~33% size overhead and slower pages make a normal hosted file the better choice.
Is this private?
Completely — the file is read and encoded in your browser with no network request. You can safely convert documents and personal photos without uploading them anywhere.
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