Encode text to Base64 or decode Base64 back to text. Supports files, URL-safe mode, and live preview. 100% client-side.
Live mode converts as you type. No button clicks needed. See results in real-time as you paste or edit text.
Toggle URL-safe Base64 encoding that replaces +/ with -_ and removes padding. Perfect for URLs and filenames.
One-click swap between input and output. Instantly verify round-trip encoding and decoding accuracy.
Your data never leaves your browser. Safe for encoding API keys, tokens, credentials, and sensitive configs.
See input/output sizes and the encoding ratio. Understand exactly how much overhead Base64 adds to your data.
Copy encoded/decoded output to clipboard or download as a file. One-click export for any workflow.