Base64 Decoder - Decode Base64 to Text or File

Decode Base64 strings to text or download as file. Supports UTF-8, binary data, and data URIs. Auto-detects content type. Free, private, works offline.

Base64 Input

0 characters

Detection

Type

MIME

Size

Decoded Output

Download Options

Filename

Extension

Copied to clipboard

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Frequently Asked Questions

Base64 decoding converts Base64-encoded text back to its original form. It reverses the encoding process, converting the ASCII representation back to the original binary or text data.

Yes! This tool can save decoded content as a downloadable file. It auto-detects whether the content is text or binary and sets the appropriate file type.

Paste your Base64 string (with or without the data:image/... prefix). The tool detects image data and lets you download it as PNG, JPG, or other image formats.

A data URI includes metadata like 'data:image/png;base64,' followed by the Base64 string. This tool handles both - it strips the prefix automatically if present.

The original data might be binary (like an image or PDF), not text. Try downloading it as a file instead. Binary data displayed as text shows random characters.

The tool validates Base64 format and shows clear error messages. Common issues: wrong padding (= characters), invalid characters, line breaks, or corrupted data.

No. Base64 is encoding, not encryption. Anyone can decode Base64 - it provides no security. It's meant for data transport, not protection.

Yes. The tool automatically strips whitespace and line breaks from Base64 input. Formatted Base64 (wrapped at 64 or 76 characters) is handled correctly.

Yes. The tool processes data locally in your browser and can handle files up to several megabytes, limited only by your browser's memory.

Yes. All decoding happens in your browser using JavaScript. No data is sent to any server - your content stays completely private.

Base64 Input

Detection

Decoded Output

Download Options

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