Quick take
Encode or decode Base64 text and inspect the result right away.
- Encode plain text such as Hello world.
- Decode URL-safe token fragments that use - and _ characters.
Base64 Encoder and Decoder
live
Output will appear here.
Base64 is reversible encoding, not encryption.
Where it fits
Use Base64 Encoder and Decoder for encoding small text snippets, decoding tokens, checking API examples, and inspecting Base64URL-like values. It works well when you want encoded or decoded text that can be copied into another debugging step and do not need a bigger workflow around it.
- Best fit: encoding small text snippets, decoding tokens, checking API examples, and inspecting Base64URL-like values.
- You start with text or encoded data that should be converted between plain text and Base64 forms.
- The useful choices are encode or decode mode, standard Base64 or URL-safe expectations, and text encoding assumptions.
- Check padding, unreadable binary output, URL-safe characters, and whether the decoded text is actually UTF-8.
- You end up with encoded or decoded text that can be copied into another debugging step.
What the output does and does not prove
- Text is converted with UTF-8 so Unicode and emoji work correctly.
- URL-safe mode swaps + and / for - and _ and can remove padding.
- Base64 is encoding, not encryption.
A clean way to use Base64 Encoder and Decoder
- Start with text or encoded data that should be converted between plain text and Base64 forms.
- Choose encode or decode mode, standard Base64 or URL-safe expectations, and text encoding assumptions.
- Run the tool once, then review padding, unreadable binary output, URL-safe characters, and whether the decoded text is actually UTF-8.
- Copy, export, or download encoded or decoded text that can be copied into another debugging step.
- Treat the output as one checkpoint, then verify the next step in the real workflow.
What to watch for
- Base64 is an encoding format, not encryption; anyone can decode it.
- Binary data may not display cleanly as text even when the Base64 input is valid.
- Do not treat Base64 values as secrets unless they are protected by a separate cryptographic mechanism.
- Decode only data you are allowed to inspect, especially when tokens may contain user or environment details.
How your data is handled
This tool works in your browser. Toolumina does not upload or keep the content you enter here.
FAQ
Is Base64 encryption?
No. Base64 is reversible encoding and should not be used to protect secrets.
Why did decode fail?
The input may contain invalid characters, missing data, or a non-UTF-8 binary payload in text mode.
Does it support Chinese text and emoji?
Yes. Text encoding and decoding use UTF-8.