What's the difference between encoding and decoding?

Encoding (e.g., 'Hello' → 'SGVsbG8=') converts text to Base64 for safe transmission or storage. Decoding reverses this: 'SGVsbG8=' → 'Hello'. Base64 is not encryption—anyone can decode it.

Why does decoding produce garbled text?

The input is not valid UTF-8 text encoded in Base64. Common causes: you're trying to decode binary data (images, files) as if it were text, or the original encoding was not UTF-8. Binary data should be downloaded as bytes, not displayed as text.

Can I Base64 encode files?

This tool works with text input. For file encoding, use the Base64 File Encoder which handles binary files and provides proper download links. Text-based encoding is for small payloads like API keys or tokens.

Why are there = or == at the end of some Base64 strings?

Padding (=) ensures the encoded length is divisible by 4. It's required for strict Base64 decoding but many implementations handle missing padding. Strings without padding are often URL-safe Base64 variant.

Which tools pair well with Base64 Encode/Decode?

Common next steps include Hash Generator, URL Encode/Decode. These related tools help continue the same workflow through generation, validation, formatting, or debugging.

Last reviewed: 2026-05-15

Base64 Encode/Decode quick answer

Base64 Encode/Decode is a browser-first tool for convert utf-8 text to and from base64.. It is designed for fast one-off work without account setup.

Use it when you need to convert utf-8 text to and from base64.
Use it when you need to base64

This text tool is local-first in the browser and does not store your input for normal conversion workflows.

Base64 Encode/Decode returns a copyable result that can be reviewed immediately or continued in a related ToolMeshly workflow.

Example

Example input and output

Input

Convert UTF-8 text to and from Base64.

Output

Run the tool to review a copyable result here.

Best for

Fast one-off checks
Developer handoff tasks
Continuing into a related ToolMeshly workflow

Not for

Long-term storage
Submitting production secrets

Base64 Encode/Decode is a focused ToolMeshly utility for convert utf-8 text to and from base64..

About Base64 Encode/Decode

Convert UTF-8 text to Base64 encoding and decode Base64 back to plain text.

Paste your text or Base64 string.
Select the mode: Encode or Decode.
Click Run to perform the conversion.
Review the result.
Copy or download the output.
Run again for each additional value you need to convert.

FAQ

What is Base64 Encode/Decode best for?: Convert UTF-8 text to Base64 encoding and decode Base64 back to plain text.
Does Base64 Encode/Decode upload or store my data?: This text tool is local-first in the browser and does not store your input for normal conversion workflows.
What's the difference between encoding and decoding?: Encoding (e.g., 'Hello' → 'SGVsbG8=') converts text to Base64 for safe transmission or storage. Decoding reverses this: 'SGVsbG8=' → 'Hello'. Base64 is not encryption—anyone can decode it.
Why does decoding produce garbled text?: The input is not valid UTF-8 text encoded in Base64. Common causes: you're trying to decode binary data (images, files) as if it were text, or the original encoding was not UTF-8. Binary data should be downloaded as bytes, not displayed as text.
Can I Base64 encode files?: This tool works with text input. For file encoding, use the Base64 File Encoder which handles binary files and provides proper download links. Text-based encoding is for small payloads like API keys or tokens.
Why are there = or == at the end of some Base64 strings?: Padding (=) ensures the encoded length is divisible by 4. It's required for strict Base64 decoding but many implementations handle missing padding. Strings without padding are often URL-safe Base64 variant.
Which tools pair well with Base64 Encode/Decode?: Common next steps include Hash Generator, URL Encode/Decode. These related tools help continue the same workflow through generation, validation, formatting, or debugging.

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Recommended workflow

Continue this task as a workflow

Use curated tool chains to finish the broader job with fewer searches.

Workflow

Inspect a JWT token

Decode token claims, inspect base64 payloads, and convert expiry timestamps.

JWT Decoder→Base64 Encode/Decode→Timestamp Converter

Related Tools

Hash Generator URL Encode/Decode

Comparisons

Base64 vs URL encode: which one to use

Guides & tutorials

Base64 Encode/Decode

Local processing

Convert UTF-8 text to and from Base64.

Input

Shortcuts: ⌘/Ctrl+Enter run · ⌘/Ctrl+Shift+C copy · ⌘/Ctrl+Z undo