Base64 Decoder
Decode Base64 back to text instantly.
🔓 Paste valid Base64 to decode. Handles UTF-8 properly.
What Is This Tool?
This tool decodes Base64 back to readable text. Paste any valid Base64 string to recover the original content. Handles UTF-8 properly for international text.
Common Decode Scenarios
- Decode JWT tokens to inspect their payload
- Read data URIs from HTML or CSS
- Debug API responses that contain Base64
- Recover text from email attachments
- Inspect HTTP Basic Auth headers
When Decoding Fails
If you see an error, the input is likely not valid Base64. Common causes: missing padding (=), stray whitespace, or characters outside the Base64 alphabet (A-Z, a-z, 0-9, +, /).
Frequently Asked Questions
Can I decode images or files?
This tool decodes to text only. For binary data like images, the output may look garbled because it's binary bytes interpreted as text. Use a dedicated Base64-to-file converter for binary content.
About the Base64 Decoder
The Base64 Decoder handles base64 decoderdirectly in your browser. Paste or type your input, and the tool processes it instantly — no upload, no signup, no waiting. It's built for the moments when you need a quick transformation and don't want to leave your workflow.
Because the tool runs client-side, it's fast and private. Your text never touches a server, which makes it safe for sensitive content. The interface is keyboard-friendly and works on any device with a modern browser.
How to Use This Tool
- Paste or type your input into the text area.
- Adjust any options the tool offers.
- The output updates automatically as you type or change options.
- Copy the result using the copy button.
Why Use an Online Tool?
Browser-based tools like this one have a few real advantages over installed software or manual methods:
- No installation. It opens instantly in any browser, on any operating system.
- Private by default. Everything runs locally, so your data stays on your device.
- Always up to date.There's nothing to update — you always get the latest version when you load the page.
- Free and unlimited. Use it as often as you like, with no account and no caps.
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