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File Conversion Tools
Encode plain text, JSON, and strings into standard RFC 4648 Base64 representation with full UTF-8 support.
Follow these simple steps to get instant, accurate results directly in your browser:
Type or paste your text, JSON object, API token, or markdown into the input box.
Select standard Base64, URL-safe Base64 (- and _), or Data URI prefix format.
Grab the encoded string or copy directly as a code snippet for cURL, JavaScript, or Python.
The Text to Base64 Converter is a robust developer utility that encodes plain text strings into standard RFC 4648 Base64 representation. Base64 is a binary-to-text encoding algorithm that represents binary data in an ASCII string format by translating it into a radix-64 representation using characters A-Z, a-z, 0-9, +, and /.
When transmitting data across networks, protocols like HTTP, SMTP email, and XML can sometimes corrupt raw binary or non-ASCII characters. Base64 ensures data integrity by guaranteeing that all transmitted bytes remain within the printable ASCII range. This tool implements full UTF-8 encoding support, preventing the classic 'Latin-1 out of range' errors common in standard browser btoa() functions.
Whether you are embedding data URIs, configuring Basic Authentication headers (Authorization: Basic), encoding API payloads, or storing serialized state, this tool delivers instant, compliant Base64 strings.
Handles international languages, special punctuation, and emojis without encoding crashes.
Provides URL-safe encoding replacing '+' with '-' and '/' with '_' for query parameters.
Shows original byte size versus encoded size (+33% standard Base64 overhead).
Zero server communication; passwords and secret keys never leave your device.
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