Recover a real WebP file from copied source code, API output, CSS, or stored Base64 text with a paste-first workflow and structural validation before download.
How to use Base64 to WebP
- Paste a WebP data URI or raw Base64 characters into the text area.
- Decode locally and verify that the bytes form a valid RIFF WebP container.
- Preview and download the recovered decoded.webp file.
What this tool is good at
When to use Base64 to WebP
Recover inline images
Turn a WebP data URI from HTML, CSS, JSON, or a development fixture back into a downloadable file.
Validate encoded payloads
Confirm that a raw Base64 value actually reconstructs a valid WebP RIFF container.
Private local decoding
Paste sensitive development data without sending it to a generic decoding website.
How to choose the right settings
Paste raw or prefixed Base64
The decoder accepts a complete data:image/webp;base64 URI or the Base64 payload by itself.
Whitespace is normalized
Line breaks used for display can be removed safely, while invalid alphabet characters and malformed padding are rejected.
WebP signatures are required
Decodable Base64 is not enough; the reconstructed bytes must identify a genuine RIFF WebP file.
Practical workflow and output details
The decoder reconstructs the original byte sequence and validates the RIFF and WEBP signatures before offering a download. It does not alter pixels or metadata.
Decoding untrusted text is performed locally, but the resulting file should still be treated according to its source. Base64 alone provides no proof of authorship or safety.
Format behavior and limitations
The accepted data URI media type is image/webp; other image media types are not silently relabeled.
Whitespace is ignored in raw Base64, but malformed padding or non-WebP decoded bytes produce a clear validation error.
Frequently asked questions
Can I paste a complete data URI?
Yes. The decoder accepts data:image/webp;base64, followed by the payload, or raw Base64 with optional whitespace.
How does it know the data is WebP?
After Base64 decoding, the tool parses the RIFF and WEBP signatures, declared size, and chunk boundaries before offering a download.
Is the image re-encoded?
No. Valid decoded bytes become the output Blob exactly as supplied, so animation, transparency, and metadata remain intact.
Related WebP tools
WebP to Base64
Encode complete WebP file bytes as a copyable data:image/webp Base64 data URI.
View WebP Metadata
Inspect WebP container type, dimensions, animation, transparency, chunks, and metadata flags locally.
Compress WebP
Reduce static WebP file sizes with an adjustable quality setting and local batch processing.