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Base64 Decoder

Decode Base64 back to text or the original file.

Encoding & DecodingBrowser-only • PrivateFree

Base64 Input

Decoded Text

Output will appear here...

Privacy First: All processing happens locally in your browser. Your data never leaves your device and is never uploaded to any server.

About Base64 Decoder

The Base64 Decoder converts Base64 back into its original text or binary form, so you can read encoded payloads, tokens, and data URIs. It accepts both standard and URL-safe Base64 and handles missing padding gracefully. Decoding runs entirely in your browser, which makes it safe for inspecting private data. To encode in the other direction use the Base64 Encoder, and for tokens specifically try the JWT Decoder.

How to Use

1Open Base64 Decoder and paste or type your data into the input area.
2Adjust any available options to match the result you want.
3Your output is generated instantly — no button-clicking required for most tools.
4Use the Copy or Download button to save your result.

Common Use Cases

Encoding data for URLs, APIs, and data URIs
Debugging tokens, headers, and encoded payloads
Converting between text, hex, binary, and Base64
Safely embedding special characters in code and markup

Frequently Asked Questions

Does it handle URL-safe Base64?

Yes. The decoder accepts both standard Base64 and the URL-safe variant that uses - and _ instead of + and /, and it tolerates missing = padding.

Why is my decoded output unreadable?

If the original data was binary — like an image or compressed file — the decoded text won't be readable characters. That's expected; Base64 can encode any bytes, not just text.

Is Base64 Decoder free to use?

Yes. Base64 Decoder is completely free with no sign-up, no subscription, and no usage limits. Every tool on CodeUtilityKit is free forever.

Is my data safe when I use Base64 Decoder?

Absolutely. Base64 Decoder runs entirely in your browser. Your input is processed locally with JavaScript and is never sent to, stored on, or logged by any server — so it is safe even for private or sensitive data.