Base64 Encode / Decode

Convert text or files to and from Base64 instantly in your browser.

Processed locally — nothing is uploaded

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Output

About Base64 Encode / Decode

Encoding inflates size by roughly a third — every three bytes become four characters — which is why an image inlined as a data URI always weighs more than the file it came from. Worth knowing before embedding anything large in CSS or JSON.

Base64 is an encoding scheme that represents binary data using a 64-character ASCII alphabet, making it safe to embed inside text-based formats such as JSON payloads, data URLs, HTML, CSS and email (MIME) attachments. This converter lets you encode plain text or whole files into Base64 and decode Base64 back into its original form, in either direction, the moment you paste or drop your input.

It is the quick way to build a data URI for an image, inspect an encoded webhook payload, or move binary data through a channel that only accepts text. Base64 is an encoding rather than encryption — anyone can decode it, so on its own it protects nothing.

Learn how this works

A Practical Guide to Everyday Developer Encoding & FormattingHow and when to use Base64, JSON formatting, hashing, JWTs, regex and cron — with free in-browser tools for each task.11 min read Why In-Browser Tools Are More Private Than Uploading FilesWhat actually happens when you upload a file to an online converter, and why client-side tools remove that risk entirely.7 min read Character Encoding Explained: ASCII, Unicode and UTF-8Why text turns into question marks and mojibake, what Unicode actually is, and how UTF-8 fixed a decades-old mess.5 min read

Frequently asked questions

Is my data uploaded when I encode or decode?

No. Everything runs locally in your browser using standard web APIs — your text, files and inputs are never uploaded to a server, so the tool works even offline once the page has loaded.

Can I Base64-encode a file, not just text?

Yes. Drop or select any file and it is read locally and converted to a Base64 string you can copy without uploading. Base64 encoding is ideal for embedding images directly into HTML or CSS as data URLs, adding certificates and keys to JSON configuration files, or embedding binary assets into documents. This keeps your resources bundled without extra HTTP requests, making deployment simpler for small, static assets.

Does Base64 encrypt my data?

No. Base64 is encoding, not encryption — anyone can decode it. Use it for safe transport of data in text channels, and use the Text Encryptor if you need real, password-based protection.

Pro Tips

→Paste raw text or files and toggle between encoding/decoding to verify data integrity in APIs and authentication tokens.
→Use the copy button to instantly grab encoded strings for headers, environment variables, and config files.
→Encode images or binary data to embed directly in HTML data URIs or email MIME messages.
→Decode JWT tokens to inspect payload claims without external libraries.

Common Use Cases

•Web developers authenticating API requests by encoding credentials for Basic Auth headers in HTTP requests.
•DevOps engineers embedding binary certificates and keys as base64 strings in Kubernetes secrets and Docker configs.
•Email administrators embedding inline images in HTML emails using base64 data URIs instead of external file links.
•Security teams decoding suspicious email attachments or intercepted data to inspect content without executing files.

How It Compares

Unlike online tools such as base64decode.org which require manual copy-paste, our encoder/decoder provides instant real-time conversion with file upload support, similar to CyberChef but with a cleaner UI focused solely on base64 operations and no learning curve for quick encoding tasks.

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