Online Base64 Converter Image (Encode/Decode Data URL)

Category: Developer · URL: /tools/online-base64-converter-image.html

Decode Base64 → Image

Base64 input (raw Base64 or full data URL)

MIME type (used when input is raw Base64)

Download filename

Preview

Encode Image → Base64

Choose image file

Output format

Input cleanup (decode)

Output

Tip: For HTML/CSS embeds, use the Data URL format. For APIs/storage, raw Base64 is often preferred.

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Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Use either direction:

Encode (image → Base64): choose a file, pick output format (raw or data URL), then click Encode.
Decode (Base64 → image): paste Base64 (raw or full data URL), choose a MIME type if needed, then click Decode to preview and download.

Keywords this page targets (natural cluster): online base64 converter image, image to base64 online, base64 to image online, convert png to base64, convert jpg to base64, base64 data url generator, data:image base64 decoder, strip data url prefix, base64 to png download, base64 image preview, encode image as data uri, decode base64 string to image, convert webp to base64, base64 to jpeg converter, base64 validator, image base64 encoder decoder

Secondary intents covered: Convert an image file into a Base64 string for embedding in HTML/CSS, Generate a proper data URL with the correct MIME type, Decode a Base64 string back into an image preview, Download the decoded image as a file, Remove or add the data URL prefix around Base64, Validate whether a string is likely valid Base64 for an image, Copy Base64 output quickly for use in code, Estimate decoded size to avoid oversized embeds

FAQ

Is this tool offline/private?

Yes. It runs in your browser and does not upload your image or Base64 anywhere.

What’s the difference between raw Base64 and a data URL?

Raw Base64 is just the encoded bytes. A data URL adds a prefix like data:image/png;base64, so browsers know the MIME type.

My Base64 has line breaks—will it work?

Enable whitespace removal (default) to strip spaces/newlines before decoding.

How do I decode Base64 that already includes a data URL prefix?

Paste the full string; the tool extracts the MIME type and Base64 automatically.

Why does decoding fail even though the string looks right?

Common causes are missing padding, copied non-Base64 characters, or the wrong content (not an image). Try pasting the original full data URL if available.

Can I download the decoded image?

Yes. After decoding and previewing, click Download to save the image locally.

Is Base64 larger than the original image file?

Usually yes—Base64 is roughly 33% larger than the binary data.