What is Base64 Encode / Decode?
Base64 Encode / Decode converts text and files to Base64 and back. Base64 represents binary data using only letters, digits and a few symbols, which makes it safe to embed in JSON, HTML, CSS, emails and URLs.
This tool fully supports UTF-8, so emoji and non-English characters encode correctly, and offers URL-safe Base64 for tokens and links. Files can be turned into Base64 strings for data URIs. Everything runs locally in your browser.
How to use Base64 Encode / Decode
Get it done in 4 simple steps — no installation or account needed.
- Choose Encode or Decode.
- Type or paste your text — or, in encode mode, pick a file.
- Toggle URL-safe output if you need it for links or tokens.
- Copy the result, or download it when decoding binary data.
Who needs Base64 Encode / Decode?
From students to professionals, here’s who gets the most out of Base64 Encode / Decode — and why.
Web developers
Embed small images and fonts as data URIs in HTML or CSS.
API developers
Encode credentials for Basic Auth headers or decode payloads.
Security learners
Inspect Base64-encoded values in tokens and logs.
Email & integration engineers
Handle attachments and binary data in text-based systems.
Is Base64 Encode / Decode safe to use?
Yes. Base64 Encode / Decode runs entirely in your web browser using JavaScript. Your files and data are processed on your own device and are never uploaded to AppsOcean or any third-party server. There’s nothing to install, no account to create, and it’s completely free.Read our privacy policy.
Base64 Encode / Decode — frequently asked questions
Is Base64 encryption?
No. Base64 is an encoding, not encryption — anyone can decode it. Never use it to protect secrets.
Why is Base64 output larger than the input?
Base64 uses 4 characters for every 3 bytes, so encoded data is about 33% larger than the original.
What is URL-safe Base64?
It replaces “+” with “-” and “/” with “_” and removes “=” padding so the string can be used safely in URLs.
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