Base64 Encoder & Decoder
Securely encode plain text into Base64 format or decode Base64 strings back into readable text. Everything happens instantly in your browser.
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Security & Encoding Logic
This tool utilizes strictly client-side JavaScript APIs to execute zero-latency operations. We use native browser UTF-8 conversion mapping to ensure complete compatibility with emojis and international characters.
Completely Secure
Everything runs instantly in the browser. No text data is ever transferred across the internet or stored on our databases.
Developer Friendly
Easily swap inputs and outputs using the toggle button to test configurations or decode tricky OAuth tokens on the fly.
How to use the Base64 Tool
Encoding Text
- 1 Ensure the toggle at the top is set to Encode Text.
- 2 Type or paste your normal readable text into the top Plain Text Input box.
- 3 The tool will instantly convert your text to a secure Base64 string in the bottom Base64 Output box.
- 4 Click the Copy Result button to save your encoded string to your clipboard.
Decoding Base64
- 1 Click the Decode Base64 toggle button at the top to switch modes.
-
2
Paste your formatted Base64 string (e.g.,
SGVsbG8=) into the top box. - 3 The tool will instantly reverse the encoding, revealing the original text in the bottom box.
- 4 If your string is malformed or invalid, a warning tag will dynamically appear.
Pro Tip: Hover over the output box and click the floating "Swap" arrows to instantly throw your result back to the top and automatically flip the mode so you can test strings back-and-forth!
Frequently Asked Questions
Base64 is a binary-to-text encoding scheme that converts binary data into a set of 64 printable ASCII characters. It is commonly used to embed images in HTML/CSS, transmit data in URLs, and encode email attachments.
No. Base64 is an encoding scheme, not encryption. It can be easily decoded by anyone. Never use Base64 to protect sensitive data � use proper encryption instead.
Common uses include embedding images in CSS/HTML data URIs, encoding binary data for JSON APIs, encoding email attachments (MIME), and passing data in URLs safely.
Yes. All encoding and decoding happens entirely in your browser using JavaScript. No data is ever sent to any server.
Yes. Gopafy's Base64 Tool is 100% free with no sign-up required and unlimited usage.
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