Base64 Decode
FreeDecode Base64 string back to plain text or file
Hello, ToolHub!
About Base64 Decode
You found a Base64 string in a token, a data URI, a config file, or an API response and need to see what it actually contains. Decoding it in your head is impossible, and spinning up a script for a one-off is overkill. This tool reverses the encoding and returns the original text so you can read or reuse the underlying data.
Paste a Base64 string and the converter decodes it back to its original text, handling the standard alphabet and padding. It is free, browser-based, requires no account, and returns the result instantly. If the input is valid Base64 it decodes cleanly; if it is malformed or actually binary content, the readable output may look garbled, which is expected.
Common uses
- Reading the contents of a Base64-encoded token or config value
- Inspecting the data inside a Base64 data URI
- Decoding a Base64 field from an API response to verify it
- Recovering original text from a Base64 string in a log
- Checking what a Base64 payload actually contains during debugging
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Accurate conversion
- Multiple formats
- Instant results
FAQ
Why does my decoded output look like gibberish?
If the original data was binary, like an image, the decoded bytes are not readable text. Base64 of plain text decodes back to readable text.
Does padding need to be correct?
Standard Base64 expects proper padding. Missing or extra equals signs can cause decoding to fail or produce unexpected output.
Is URL-safe Base64 supported?
Standard Base64 decodes directly. URL-safe variants use - and _ instead of + and /, so convert those characters first if needed.
Is my input sent to a server?
No. Decoding happens in your browser, which suits tokens and other sensitive strings.
Can I use Base64 Decode on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.