How to encode or decode Base64 in 3 easy steps
- 1
Paste text or drop a file
Type or paste the text you want to encode, or drop an image/file into the box to get its Base64 representation.
- 2
Choose encode or decode
Select “Encode” to convert text to Base64, or “Decode” to turn a Base64 string back into its original text.
- 3
Copy the result
The output updates live. Use the copy button to grab it — or download a file for encoded binary data.
Why use the base64 encoder & decoder tool from Super Utility Hub?
Encode and decode Base64 right in your browser. Base64 is the standard way to represent binary data as safe ASCII — used in data URLs, JWT payloads, API tokens, and email attachments. This tool converts text (UTF-8 safe) or entire files to Base64 and back.
Paste a token to decode it instantly, or drop in a file to get its data URL. The live output updates as you type, and the copy button puts the result on your clipboard in one click.
All processing is local — nothing is uploaded, so you can safely inspect tokens and encoded payloads from your own applications. Free and unlimited.
- Processes everything in your browser — no upload servers involved
- Free forever with unlimited uses
- Works on Windows, macOS, Linux, Android and iOS
- No watermark or branding on your output, ever
Frequently asked questions
Is the Base64 output URL-safe?
Standard Base64 uses +, / and = padding. For URLs, replace + with - and / with _ (base64url). The tool keeps standard Base64 by default.
Why does my decoded text show weird characters?
The input may not be Base64, or it may represent binary data (like an image) rather than text. Encode supports both text and files; decoding binary shows it as-is.
Does Base64 make data smaller?
No — Base64 expands data by about 33%. It trades size for safety, so it's used for transport (URLs, tokens) rather than compression.
Can I decode a JWT with this tool?
The middle sections of a JWT are Base64url-encoded JSON. Our dedicated JWT debugger decodes them for you automatically.