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Base64 Encoder and Decoder

Convert plain text to Base64 and decode Base64 back into readable text without leaving the browser.

URL Encoder JSON Formatter JWT Debugger
Base64 Encoder
Processed entirely in your browser. No uploads, no background requests, and no account needed.
Ctrl+Enter Encode Ctrl+Shift+Enter Decode Ctrl+Shift+C Copy
Text or Base64 Editable input
1 line | 0 chars | 0.0 KB
Encoded or decoded result Read only output
1 line | 0 chars | 0.0 KB
Ready Choose encode or decode.
The conversion happens locally in your browser.
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Base64 Encoder

Base64 encoding is one of those quiet standards developers run into everywhere. It shows up in HTTP headers, data URLs, OAuth flows, debugging payloads, generated test fixtures, and quick transport formats that need to stay plain-text friendly. Instead of moving raw binary bytes through a channel that only expects text, Base64 remaps the original bytes into a safe character set that most systems can pass along without corruption.

In day-to-day work, the real need is usually speed and trust. You want to check whether a token fragment decodes cleanly, inspect a test fixture, or encode a short string for an integration without pasting it into an opaque web form that may store or log the input. This page is designed around that concern. The encode and decode steps happen on your device, in the browser, with no backend round trip and no upload step.

The tool also handles UTF-8 text, which means it is useful beyond plain ASCII snippets. You can swap input and output, copy the transformed result, or download it if you need to attach it to documentation or move it into another workflow. For small debugging tasks, that usually means fewer steps and fewer trust questions before you get back to the actual engineering problem.

How to Use the Base64 Encoder

  1. Paste plain text into the input editor and click Encode to convert it into Base64.
  2. Paste an encoded string into the same input editor and click Decode to turn it back into readable text.
  3. Use Swap if you want to continue transforming the last result without manual copy and paste.
  4. Check the line, character, and size stats below each panel for a quick sanity check.
  5. Use Copy or Download to move the result into your next debugging or documentation step.

Base64 Encoder Examples

Before 
Authorization: Basic ZGVtbzpwQHNzdzByZA==
After 
demo:p@ssw0rd

Frequently Asked Questions

  • What is Base64 encoding?

    Base64 encoding turns binary or plain text data into a limited ASCII character set so it can travel safely through systems that expect text.

  • Is Base64 encryption?

    No. Base64 is only an encoding format. Anyone can decode it back to the original content if they have the encoded string.

  • Does this tool upload my text?

    No. Encoding and decoding happen directly in your browser, so your data stays on your device.

  • Can I decode Unicode text from Base64?

    Yes. This tool handles UTF-8 input and output, so it works with plain English text as well as non-ASCII characters.

  • When do developers use Base64?

    Common uses include HTTP basic auth payloads, embedding small assets, serializing tokens, and moving binary-safe data through text-only channels.

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