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Step 1
Enter your plain text or Base64 string into the input area.
Base64 Encoder Decoder Online
Use NewTools to encode and decode Base64 text directly in your browser. Handles Unicode text safely for Base64 encoding and decoding in the browser.
Reliable Base64 Converter. Easily encode and decode text using Base64. Safe, local, and supports full Unicode.
No installation
Fast processing
Browser friendly
Privacy-aware
Features
Two-way Base64 encoding and decoding for text strings and data payloads
Full Unicode (UTF-8) support for international alphabets, symbols, and emojis
100% private in-browser processing using native JavaScript APIs (TextEncoder & btoa/atob)
Instant one-click clipboard copying for encoded and decoded text outputs
Real-time syntax validation with clear error notices for invalid Base64 input
Free to use with no account, file queues, or software installation required
How It Works
2
Step 2
Choose 'Encode' to convert to Base64, or 'Decode' to revert back to text.
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Step 3
Copy the processed output instantly.
Common Use Cases
API Authentication & Basic Auth Headers
Encode username and password credentials into standard Base64 format for HTTP Basic Authentication authorization headers.
HTML & CSS Data URI Generation
Prepare small text snippets, SVG icons, and configuration blocks for inline embedding in web stylesheets and JSON objects.
Developer Debugging & Token Inspection
Decode Base64 payloads, webhook data blocks, and serialized tokens to inspect their underlying human-readable text.
Tips & Best Practices
Tip 1
Make sure your Base64 input is valid and properly padded with '=' before decoding.
Tip 2
This tool only accepts text input. For image to Base64 conversion, a different tool is required.
Base64 Encoder Decoder
Browser-Native Processing
The tool uses modern browser APIs like TextEncoder and btoa to handle strings, ensuring your data is never sent to a backend server.
Frequently Asked Questions
Can I encode images or files?
No, this specific tool is designed to encode and decode text strings only.
Is my data uploaded?
No, processing happens instantly on your device via JavaScript APIs. No data is sent to external servers.
Is Base64 encryption?
No, Base64 is an encoding scheme used to represent binary or complex text data as printable ASCII characters. It does not provide cryptographic security.