Encode or decode Base64 text instantly in your browser. Nothing is sent to any server.
Switch between Encode and Decode tabs to convert plain text to Base64 or Base64 back to readable text. Useful for encoding API tokens, creating data URIs, and debugging encoded strings — all without sending data to any server.
Choose Encode or Decode from the tabs at the top. Paste or type your input and the result appears immediately. Click Copy to copy the output to your clipboard.
Base64 shows up everywhere in software because it is a convenient way to move binary or awkward text content through systems that prefer plain text. The problem is that the output looks obscure enough that people sometimes confuse “hard to read at a glance” with “secured”.
This tool is useful because it handles the practical side cleanly: encode when a system expects Base64, decode when you need to inspect what a value actually contains.
Base64 often appears in headers, auth material, or payload fragments. When something looks wrong, being able to decode and inspect it quickly is useful.
Front-end workflows sometimes carry small assets as Base64 strings, where quick inspection or preparation can save time.
Encoded values often show up in systems where the content matters more than the fact that it is encoded.
It is not. If someone can read the string, they can usually decode it just as easily.
A missing character or truncated payload is enough to break decoding or produce confusing output.
Once a value is decoded, the real issue is often in the plain text, JSON, or markup inside it rather than in Base64 itself.
If you receive a Base64 blob in a config, log, or support thread, decoding it is often the fastest way to make the problem concrete.
When a service expects Base64, the task is less about theory and more about getting the exact encoded output without introducing accidental formatting changes.
For data URIs or similar workflows, quick encode/decode helps reveal whether the underlying content is what you think it is.
This tool encodes and decodes Base64. It does not encrypt data, validate broader security practices, or tell you whether a secret was handled safely. It solves a format problem, not a confidentiality problem.
The biggest recurring mistake around Base64 is not technical complexity. It is false confidence. A tool that makes the conversion easy is useful, but only if it also reinforces what Base64 is and is not for.
Base64 encodes binary data as plain ASCII text. Common uses: data URIs (embedding images in CSS/HTML), encoding email attachments, storing binary in JSON, and passing data in URLs.
Base64 strings must have correct padding (= or == at the end). If the input is truncated or corrupted, decoding will fail or produce garbled text.
No. Base64 is encoding, not encryption. Anyone who sees the encoded string can decode it instantly. Never use Base64 to hide passwords or secrets.
This tool runs entirely in your browser. Nothing you type or paste is sent to any server — all processing happens locally on your device.