Image to Base64
Encode a remote image as a base64 string.
POST
10 credits
/v1/convert/image-to-base64
curl -X POST "https://convert.toolkitapi.io/v1/convert/image-to-base64" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{"url": "https://toolkitapi.io/logo.png", "format": "webp", "quality": 85}'
import httpx
resp = httpx.post(
"https://convert.toolkitapi.io/v1/convert/image-to-base64",
json={"url": "https://toolkitapi.io/logo.png", "format": "webp", "quality": 85},
)
print(resp.json())const resp = await fetch("https://convert.toolkitapi.io/v1/convert/image-to-base64", {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify({"url": "https://toolkitapi.io/logo.png", "format": "webp", "quality": 85}),
});
const data = await resp.json();
console.log(data);# See curl example
Response
200 OK
{
"base64": "UklGRiIAAABXRUJQVlA4TBUAAAAv..."
}Description
Encode a remote image as a base64 string.
How to Use
1
1. POST a JSON body with the image `url`.
2
2. Optionally set `format` and `quality` to re-encode before returning base64.
3
3. Read the `base64` string from the response.
About This Tool
Fetches a remote image and returns it as a base64-encoded string. Optionally re-encodes to a different target format and quality before encoding.
Useful for embedding images inline in JSON payloads, emails, and database records — any context that prefers a single string over a file reference.
Why Use This Tool
- AI pipelines — Feed base64-encoded images into models that expect inline data
- Email embedding — Embed images in HTML email via `data:` URIs
- Database storage — Persist small images as base64 text columns
- Offline caching — Snapshot remote images as inline strings
Frequently Asked Questions
Does the result include a `data:` prefix?
No — only the raw base64. Prefix `data:image/...;base64,` yourself when constructing a data URI.
How big can the source be?
The source image size is capped at the server-configured download limit (typically a few MB).
Is the response chunked?
No — the full base64 string is returned in a single JSON response.
Start using Image to Base64 now
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