How do I decode Base64 to a file?

Paste the Base64 string, start the decode process, and download the detected file.

Can the decoder detect mime type automatically?

Yes. The decoder checks data URI headers and file signatures to detect the output type.

Can I paste a full data URI?

Yes. Data URI prefixes are supported and removed automatically before decoding.

Base64 Decoder Online Free

Base64 Decoder

Paste a Base64 string, let the system detect the file type, and download the decoded file in one step.

Quick answer

Base64 Decoder lets you decode Base64 content online. Use it for file transport, API payloads, previews, or restoring downloadable files from Base64 text.

Paste Base64 text or a full data URISupported input for this page.

Detected file with download linkOutput returned after processing.

10MB / 25MB / UnlimitedGuest, Registered, and Pro plan limits.

Base64 Decoder

Paste Base64, click Decode, then download the generated file.

5 free tries on this tool

Drop files here

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Paste Base64

How it works

Paste Base64, click Decode, then download the generated file.

FAQ

What input is supported?

Paste Base64 text or a full data URI.

What result do I get?

Detected file with download link.

Is this free to use?

Yes. Guest and registered users can use the tool within their daily per-tool tries and file-size limits.

Tool notes

Guest users can process files up to 10MB.
Registered users can process files up to 25MB.
Pro users have unlimited file size.
Every page uses the same job queue, storage, and download workflow.