Base64 Encoder & Decoder
Convert text to Base64 and back instantly. Full UTF-8 support (emoji and accents included) and an optional URL-safe variant — all processed privately in your browser.
To encode or decode Base64, choose a mode, paste your text, and the result appears instantly with full UTF-8 and URL-safe support — all in your browser.
Zero Server Uploads
Files process in local RAM
Instant WASM Speed
No waiting queues or lags
Unlimited Batching
Convert files without limits
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Need custom options, higher limits, or extra format support? Let our engineering team know!
How to use Base64 Encode & Decode
- 1Choose Encode or Decode.
- 2Paste your text or Base64 string.
- 3Optionally turn on URL-safe encoding.
- 4Copy the instant result.
How it works
Choose Encode or Decode, paste your text, and the result appears instantly. UTF-8 is handled correctly, so emoji and non-English characters round-trip cleanly.
Turn on URL-safe to use the -_ alphabet without padding, ideal for tokens and query strings.
When to use Base64
Base64 is used to embed images or fonts in CSS/HTML as data URIs, to transmit binary data over text-only channels, in JWTs and API tokens, and in email attachments.
Note that Base64 is encoding, not encryption — it's easily reversible and provides no security.
Frequently Asked Questions
Does it handle emoji and accented characters?
Yes. Encoding and decoding are UTF-8 safe, so emoji, accents and other non-ASCII characters convert correctly in both directions.
What is the URL-safe option?
It swaps + and / for - and _ and drops padding, producing Base64 that's safe to use in URLs and filenames.
Is Base64 secure?
No — Base64 is reversible encoding, not encryption. Anyone can decode it. Don't use it to protect secrets.