Base64 Encoder / Decoder
Encode and decode Base64 — for tokens, images and data URIs.
Base64 turns binary data into plain ASCII text — that’s how images hide inside data URIs and how email attachments travel. ‘Hello’ becomes ‘SGVsbG8=’. It’s encoding, not encryption: anyone can decode it, so never use it for secrets.
How to use the base64 encoder / decoder
- Paste your text.
- Choose encode or decode.
- Copy the result.
Base64 Encoder / Decoder — FAQs
What is Base64 used for?
Embedding images in HTML/CSS (data URIs), email attachments (MIME), and safely transporting binary data through text-only systems.
Is Base64 encryption?
No — it’s trivially reversible encoding. It hides nothing from anyone; it just makes binary data text-safe.
Why does output end with =?
Padding: Base64 works in 3-byte chunks, and = fills the last chunk. One or two = signs are normal.
Is my data uploaded?
No — encoding happens entirely in your browser.
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