Base64 Encoder

Convert text to Base64, or encode a file for embedding in data URLs and JSON payloads.

Your text or file is encoded locally in your browser and never uploaded.

How to use Base64 Encoder

  1. Type or paste text into the box, or upload a file.
  2. The Base64 output appears automatically.
  3. Copy it, or download it as a .txt file.

About this tool

Base64 turns binary data into plain text characters, which lets you embed images in HTML or CSS, send binary content through text-only channels, and store files inside JSON.

Encoding runs entirely in your browser, so even private files are never transmitted.

When to use it: embedding small files in HTML/CSS, or sending binary data through text-only channels.

Frequently asked questions

Is Base64 encryption?
No. Base64 is an encoding, not encryption. Anyone can decode it, so never rely on it to protect secrets.
Why does Base64 output look longer than the input?
Base64 uses 64 characters to represent data, so the output is about a third larger than the original bytes.
Why do data URLs start with “data:”?
A data URL prefixes the Base64 with a MIME type so the browser knows what it is decoding, for example data:image/png;base64, followed by your encoded output.
Can I embed an image in HTML with this?
Yes — encode the image file and paste the result into an img src attribute. Great for tiny icons; too heavy for large photos.
Why do email attachments use Base64?
Email was originally a text-only system; Base64 lets binary files travel through it unchanged.
Is Base64 okay for hiding passwords?
No — anyone can decode it instantly. Use real encryption for secrets; Base64 is only a transport encoding.

Related tools

Base64 Decoder Decode Base64 text back to readable text or a file. URL Encoder Encode text so it can be used safely inside a URL. JSON Formatter Format, indent and beautify JSON data so it is easy to read.

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How to use Base64 Encoder

Paste your code, data, or URL into the Base64 Encoder input area. Select the appropriate mode or option, then process. The formatted or converted output appears clearly and can be copied or saved.

Practical benefits

Frequently asked questions

Is this tool free to use?
Yes. Base64 Encoder is fully free with no account or subscription required.
Does it upload my files?
No. All processing occurs locally within your browser session.
Can I use this for professional projects?
Yes, the tool is designed for both casual and professional use. Always verify critical outputs.