Base64 Encoder / Decoder
Encode and decode Base64 strings for data transfer
Developer Tools That Respect Your Data
Developers reach for small utilities dozens of times a day — formatting JSON, testing a regex, generating a UUID, encoding Base64, minifying CSS, converting a timestamp. Each of these tasks is trivial individually, but collectively they consume meaningful time and break focus. Good developer tools reduce each one to a single paste-and-copy action.
The most important property of a developer utility is trust. When you paste an API response to format it, you might be pasting real credentials, customer data, or production configuration. A tool that sends your input to a server creates a risk every time you use it. A tool that runs entirely in your browser creates none. Every developer tool on ToolsHub processes your data locally — nothing is transmitted, stored, or logged — so you can safely paste real values without first scrubbing them.
Consistency matters too. A JSON formatter, a regex tester, and a diff checker should all behave the way you expect them to, with predictable keyboard shortcuts, clear error messages, and output you can copy with one click. The goal is for the tool to disappear into your workflow — to be so fast and familiar that you never have to think about the tool itself, only about the problem you are solving.
About Base64 Encoder / Decoder
Encode and decode Base64 strings instantly for data transfer, API development, and image embedding. Our Base64 Encoder/Decoder is used by developers worldwide for encoding binary data as text in JSON payloads, HTML data URIs, and authentication headers.
Base64 encoding is a fundamental skill in web development. HTTP Basic Authentication headers require Base64-encoded credentials. JSON APIs that return image data often use Base64 data URIs. Email attachments are encoded in Base64 by the MIME standard. JWT tokens use Base64URL encoding for their header and payload.
Our encoder/decoder handles all standard and URL-safe Base64 operations instantly, with zero setup, zero installation, and zero server-side processing. Your sensitive credentials and token values never leave your browser.
Common Use Cases
Key Features
How to Use Base64 Encoder / Decoder
- 1
Select "Encode" or "Decode" mode using the toggle buttons
- 2
Paste your text, binary data, or Base64 string into the input
- 3
The conversion happens instantly
- 4
Copy the output with a single click
- 5
Use the "Clear" button to start a new conversion
Why Use Base64 Encoder / Decoder?
HTTP Basic Auth Development
API testing with Basic Authentication requires Base64-encoding your credentials in the format "username:password". Encode them here, paste into your Authorization header, and you're ready to test.
Debug JWT Tokens
JSON Web Tokens (JWTs) have three Base64URL-encoded sections separated by dots. Paste the middle section (the payload) into our decoder to see the token's claims without installing any tools.
Embed Images in CSS/HTML
Base64 encode small images to embed them directly in CSS or HTML as data URIs, eliminating an HTTP request and improving page performance for small icons and logos.
Secure Environment
Decode sensitive tokens, API keys, and credential strings entirely in your browser. Nothing is sent to any server, making this safe for production environment debugging.
