Free browser tool
Base64 Encoder Decoder
Encode text to Base64 or decode Base64 text with Unicode-safe output, presets, validation, and copy controls.
Updated 2026-05-13
Encode or decode text
Use the presets to see the workflow, then paste your own text. The result stays in the browser and can be copied after you review the summary.
Input chars
0
Output chars
0
Last action
Ready
How to use this tool
- Paste or type your input into the tool.
- Choose the action or option that matches your task.
- Review the output before copying it into another app.
Notes
Convert text to Base64, decode Base64 back to readable text, inspect character counts, handle invalid input, and copy the browser-generated result.
Inputs are processed in the browser for this static MVP. Avoid pasting secrets into any online tool unless you understand the environment.
FAQ
Is Base64 secure?
No. Base64 is encoding, not encryption. Anyone with the encoded text can decode it, so do not use it to protect passwords, tokens, or private notes.
Can it handle non-English text?
Yes. The tool uses Unicode-safe text encoding and decoding, so normal multilingual text can round-trip instead of breaking into unreadable bytes.
What happens if the Base64 input is invalid?
The decoder shows an error and leaves the output empty instead of guessing. This makes broken padding, copied spaces, and wrong input easier to catch.
When should I use URL encoding instead?
Use URL encoding for query values and link parts. Use Base64 when bytes or text need to be represented as a text-safe alphabet.