JSON Formatter & Validator
Validate, pretty-print, and minify JSON payloads safely using native JSON.parse and JSON.stringify with detailed syntax error reporting.
Base64 Encoder & Decoder
UTF-8 SafeEncode plain text (including full UTF-8 Unicode and emojis) to Base64 or decode Base64 strings back to readable text with error validation.
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How to Use Base64 Encoder & Decoder
- 1Select 'Encode to Base64' or 'Decode from Base64' mode at the top of the tool.
- 2Paste your plain text (including international characters or emojis) or Base64 string into the input box.
- 3Optionally enable 'URL-Safe Base64' (`-` and `_` instead of `+` and `/`) when working with JWTs or query parameters.
- 4Copy the output or clear the workspace with one click.
Key Features & Privacy
- ✦Uses `TextEncoder` and `TextDecoder` byte streams so multi-byte UTF-8 characters (like `🚀`, `नमस्ते`, `日本語`) never throw `InvalidCharacterError`.
- ✦Supports both Standard Base64 (RFC 4648 §4) and URL-Safe Base64 (RFC 4648 §5).
- ✦Strict input validation that catches corrupt Base64 characters or invalid padding and reports clear error messages.
- ✦Instant swap button to move output back to input for round-trip testing.
Frequently Asked Questions
Why do standard browser `btoa()` calls fail on emojis or non-ASCII text?
Native `btoa()` only accepts Latin1 single-byte characters. Our tool first encodes text into UTF-8 bytes via `TextEncoder` before converting to Base64, guaranteeing accurate international text handling.
What happens if I paste an invalid Base64 string in Decode mode?
The decoder validates character sets and byte boundaries before decoding and shows an explicit error message instead of outputting garbled symbols.
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