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Free Base64 Encoder and Decoder Online – Text, Image & File Converter | TrenTyx

trentyx@local:~/text-encoding/base64-tool $ run base64-tool_

100% browser-based Base64 encoder & decoder. Zero server requests, instant local conversion.

input.txt

Drop file here

OUTPUT — BASE64

Paste input on the left and press Encode or Decode to see the result here.

Decoded image preview
Input: 0 B
Output: 0 B

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary data as an ASCII string. It's widely used to embed images in HTML/CSS (data: URIs), transmit binary attachments in email (MIME), and safely pass data through text-only channels like JSON payloads or URL query parameters. This tool lets you encode any text or file into Base64 — and decode Base64 strings back to their original form, including automatic image preview — entirely in your browser with zero server contact, keeping your data private.

Common Use Cases

  • Embedding images in CSS/HTML — convert small icons or images into data: URIs to reduce HTTP requests.
  • Decoding JWT or API payloads — many tokens and API responses encode binary or JSON data as Base64 strings.
  • Sending attachments over email (MIME) — email protocols require binary files to be Base64-encoded as text.
  • Passing binary data in URLs — use URL-safe Base64 to safely include data in query parameters.

Frequently Asked Questions

Is Base64 encoding the same as encryption?

No. Base64 is an encoding scheme, not encryption — it does not add any security. Anyone can decode a Base64 string back to its original form instantly. Never use Base64 alone to protect sensitive data.

What's the difference between standard and URL-safe Base64?

Standard Base64 uses + and / characters, which have special meaning in URLs. URL-safe Base64 replaces them with - and _ so the encoded string can be used directly in URLs or filenames without extra escaping.

Can I encode images and files, not just text?

Yes. This tool supports drag-and-drop file upload for images and other file types, converting them to a Base64 string with automatic image preview — all processed locally in your browser.

Is my data uploaded to a server when I use this tool?

No. All encoding and decoding happens entirely client-side in your browser using JavaScript. Your text, images, and files never leave your device.

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