Developer tool / Encoding
Base64 Encoder Decoder
Encode text to Base64 or decode Base64 back to UTF-8 text locally in your browser.
100% processed in your browser
Input
Plain UTF-8 text
Base64 output
Generated locally in this browser.
How to use it
- 1 Choose encode or decode mode.
- 2 Paste text or Base64 input.
- 3 Copy or download the generated output.
Useful for
- Encoding small text values for development workflows
- Decoding Base64 payloads while debugging APIs
- Checking UTF-8 Base64 strings without uploading data
Good to know
- Base64 is not encryption and does not protect secrets.
- This tool is for text values, not large binary files.
- Invalid or non-UTF-8 Base64 input is rejected.
Questions
Base64 Encoder Decoder FAQ
Does this Base64 tool upload my text?
No. Encoding and decoding run inside your browser. Utilshub does not receive the input or output.
Is Base64 encryption?
No. Base64 is reversible encoding, not encryption. Anyone can decode Base64 text, so do not use it to protect secrets.
Does this support Thai text and emoji?
Yes. Text is encoded and decoded as UTF-8, so non-English text and emoji are handled correctly.
Can I decode binary files here?
No. This first version is focused on text values. Large binary file decoding should be a separate file-focused tool.
Continue locally
Related tools
Keep working with another browser-only tool. Your files and tool inputs stay on your device.