Base64 Decoder Online Free
Decode Base64 encoded text back to readable text
What is Base64 Decoder?
Base64 decoding converts Base64-encoded strings back to their original text or binary data. If you've received a Base64 string from an API, email header, or encoded URL, this tool instantly reveals the original content.
Our Base64 Decoder handles standard Base64 encoding (RFC 4648) and correctly processes UTF-8 encoded text, including international characters and emojis. It's an essential tool for debugging APIs and inspecting encoded data.
Simply paste your Base64 string and get the decoded result instantly. All processing happens in your browser — your data stays private and is never transmitted to any server.
How to Use Base64 Decoder
- Paste the Base64 encoded string into the input area
- The decoded text appears instantly
- If the output looks garbled, the original data may be binary (not text)
- Copy the decoded result to use in your application
Why Use Our Base64 Decoder?
- 100% Free: No registration, no limits, completely free to use
- Privacy First: All processing happens in your browser - no server uploads
- Fast & Easy: Instant results with a clean, simple interface
- Mobile Friendly: Works perfectly on desktop, tablet, and mobile
Frequently Asked Questions
How do I decode Base64 to readable text?
Paste the Base64 encoded string into the input area and the tool instantly decodes it to the original text. It handles standard Base64 (RFC 4648) including padding characters (=) automatically.
What does Base64 decoded text look like?
Base64 decoding converts encoded strings like "SGVsbG8gV29ybGQ=" back to readable text ("Hello World"). If the original data was binary (like an image), the decoded output will show the raw binary data.
How do I know if a string is Base64 encoded?
Base64 encoded strings contain only A-Z, a-z, 0-9, plus (+), slash (/), and equals (=) for padding. They're typically a multiple of 4 characters long. Common signs include strings ending with "=" or "==" padding.