HTMLBase64 Encode / Decode
Encode text to Base64 or decode Base64 to text, then export a privacy-safe payload QA pack with byte counts, padding/alphabet checks, data URI and JWT-shape notes, and a starter Node verifier. Raw input and converted output are intentionally omitted from the pack. Runs entirely in your browser.
Ctrl+Enter to run | Ctrl+K to switch tools | Recent button shows input history
Repeating this work? Turn this kind of browser utility into an API batch, MCP prompt, extension workflow, or shared team recipe.
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What is in the Base64 payload QA pack?
It summarizes operation mode, character and byte counts, decoded byte length, padding, URL-safe alphabet use, data URI MIME type, JWT-like shape, review notes, and a starter Node verifier without copying the raw input or converted output.
Is Base64 encryption?
No. Base64 is only an encoding. Anyone can decode it, so do not treat Base64 output as proof that secrets, tokens, or customer data are protected.
Does this support URL-safe Base64 or data URIs?
The QA pack detects URL-safe alphabet characters, restores missing padding for review, and notes data URI MIME types. Confirm what your receiving service expects before shipping.