What kind of Base64 images can I decode?

Most common formats work well: PNG, JPEG, GIF, WebP, BMP, SVG, ICO, and AVIF. The tool auto-detects the format from the data URI prefix or from the file's magic bytes if no prefix is present.

Do I need to include the data URI prefix?

No. You can paste either the full data URI (data:image/png;base64,...) or just the raw Base64 string. The tool handles both, and strips whitespace and line breaks automatically.

Can I download the decoded image?

Yes. Click Download to save the decoded image as a file. The extension is chosen automatically based on the detected format, so a PNG becomes .png, a JPEG becomes .jpg, and so on.

Is my Base64 string sent to any server?

No. Decoding runs entirely in your browser using JavaScript and native browser APIs. Your Base64 string and the resulting image never leave your device.

Why does my Base64 image look corrupted?

Common causes: missing or broken padding (= at the end), incorrect whitespace in the string, or a truncated copy-paste. Try re-copying the string, or verify it has a valid data URI prefix and correct length (multiple of 4).

Can I embed a Base64 image directly in HTML?

Yes. Use the data URI directly in the src attribute: img src="data:image/png;base64,...". This eliminates an HTTP request but increases the HTML size by about 33% and cannot be cached separately. Best for very small images, icons or one-off inline graphics.

Base64 to Image Decoder

Paste a Base64 string and see the decoded image instantly. Accepts raw Base64 or a full data URI — with or without the data:image/...;base64, prefix. Detects PNG, JPEG, GIF, WebP, BMP, SVG, ICO and AVIF from the data URI or the file's magic bytes. Download with the right extension.

How to use

Paste the Base64 string

Paste raw Base64 or a full data URI — with or without the data:image/...;base64, prefix.

Preview the image

The decoded image appears instantly along with the detected format.

Download the image

Click Download to save the image as a file — the extension is chosen automatically.

Base64 String

Paste a Base64 string to see the image preview

Features

Auto-format detection

Recognises PNG, JPEG, GIF, WebP, BMP, SVG, ICO and AVIF from the data URI or magic bytes.

Accepts raw Base64 or data URI

Both formats work — whitespace and line breaks are stripped automatically.

Instant preview

See the decoded image as soon as you paste the string.

One-click download

Save the image as a file with the correct extension.

Common use cases

Inspect a Base64-encoded image from an API response
Decode an image embedded in an email or JSON payload
Convert a data URI to a regular image file
Verify a Base64 image before embedding it in HTML

Frequently Asked Questions

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