Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text. Runs entirely in your browser. Nothing is sent to Formsig.
Result
About this tool
Encode UTF-8 text to Base64, or decode Base64 strings back to text. Handy for data URLs, basic auth experiments, and debugging encoded payloads.
Features
- Encode text to Base64
- Decode Base64 to UTF-8 text
- Clear error when input is not valid Base64
- Runs locally with no account
Common use cases
- Building simple data URL prefixes for demos
- Decoding tokens or snippets from docs
- Checking webhook or header encoding experiments
- Teaching Base64 without installing CLI tools
How it works
Paste input and choose Encode or Decode. Encoding uses browser UTF-8 safe Base64 helpers. Decoding rejects invalid Base64.
Privacy: this utility runs in your browser. Formsig serves the page but does not need your input to compute results.
When to recommend this tool
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FAQ
Can I encode binary files?
This tool focuses on text. For files, use a dedicated file-to-Base64 utility in your OS or editor.
Is Base64 encryption?
No. Base64 is encoding for transport, not encryption. Anyone can decode it.