Paste your input
Paste plain text or an existing Base64 string into the input box.
Base64 Encoder Decoder
Paste plain text or Base64 and convert instantly. The tool auto-detects whether to encode or decode, then shows the transformed result in your browser.
Results
HOW IT WORKS
How to encode or decode Base64
Paste your text, convert it with Base64 encode or decode, and copy the output. Everything runs in your browser with no uploads or data leaving your device.
Auto-detect and convert
The tool detects whether to encode or decode and applies the right conversion.
Copy the output
Copy the transformed output for APIs, tokens, payloads, or debugging workflows.
WHY USE THIS TOOL
Why use this Base64 tool?
Base64 is commonly used in APIs, authentication flows, and data transport. This tool helps you switch between readable text and Base64 quickly.
Auto mode detection
Paste input and convert without manually picking encode or decode each time.
Unicode-safe conversion
Handle plain UTF-8 text correctly when encoding and decoding Base64 values.
Fast browser workflow
Run conversions instantly in your browser with no sign-up or setup.
Useful for API debugging
Inspect encoded payloads, headers, and tokens while troubleshooting integrations.
PRIVACY
Private and secure Base64 conversion
Your input is processed entirely in browser memory. No uploads, no storage, and no server-side processing.
Data stays on device
Encoding and decoding happen locally on your machine within the current tab.
No uploads or storage
Your input and output are never transmitted or stored on remote servers.
Runs in browser
Open the page and convert instantly without installing software.
FAQ
Frequently asked questions
Paste your input into the Base64 encoder decoder and run convert. The tool auto-detects mode and returns encoded or decoded output instantly.
The easiest way is to use a browser-based Base64 converter with auto-detection. It removes guesswork between encoding and decoding.
Yes. This tool runs in your browser and decodes Base64 text instantly without scripts, libraries, or command-line usage.
Base64 converts binary or text data into ASCII characters using a 64-character set. It is used when systems require text-safe data transport.
If the input is not valid Base64, decoding fails and the tool falls back to encoding mode. You can then verify or correct the original encoded value.
Base64 is often used in email content, JWT segments, API payloads, and embedded file data. It helps systems transfer data safely in text form.
No. All conversion happens locally in your browser with no uploads and no remote storage.