Base64 Encoder/Decoder

Encode and decode Base64 strings

Input

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Output

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Base64 Encoder/Decoder

Encode and decode Base64 strings instantly with our powerful, browser-based Base64 tool. Designed with developers and security professionals in mind, this tool delivers lightning-fast performance, clean encoding/decoding, and 100% client-side processing to keep your data secure. Whether you're working with small text snippets or large binary files, the encoder handles everything smoothly without slowing down your machine.
Built on the same high-performance core as our industry-leading JSON and XML formatters, the Base64 tool ensures precise encoding, real-time validation, and automatic error detection. It's perfect for encoding API credentials, embedding binary data in JSON, preparing data for transmission, or decoding Base64-encoded content from various sources.
With support for text input, file uploads, copy/paste operations, and instant encoding/decoding, this Base64 Encoder/Decoder becomes an essential part of any developer's workflow. No installations, no backend requests, no data tracking—just fast, secure, and reliable Base64 operations right from your browser.
Optimize your productivity with a clean UI, blazing performance, and robust Base64 encoding capabilities—built to handle even the largest datasets with ease.

Key capabilities

  • Smart encoding: Convert text, binary files, and data to Base64 format with proper padding and formatting.
  • Accurate decoding: Decode Base64 strings back to original text or binary data with automatic validation.
  • File support: Upload files directly and encode them to Base64, or decode Base64 strings back to downloadable files.
  • History & downloads: Save encoded/decoded snippets locally, rename them, and re-download in one click.

Privacy & reliability

Just like our other formatters, the Base64 experience is completely local—no uploads, no external APIs, no telemetry. Your data never leaves your machine, making it safe for sensitive credentials, confidential files, or private data.

Robust validation highlights invalid Base64 strings using friendly error messages so you can resolve issues before using the encoded/decoded data.

Quick how-to

  1. Paste text or upload a file into the editor on the left.
  2. Click Encode to convert to Base64 or Decode to convert from Base64.
  3. Copy, download, or save the output to revisit it later.