Base64 encoder decoder
Convert, calculate, clean text, and create QR codes without sign-up.
Input
Result
Inputs are processed in your browser and are not sent to the server. Privacy by design
How to use
- Encode plain text into Base64 or decode Base64 strings while checking sample payloads, API examples, and configuration snippets.
- Paste or type only sample data that is safe to inspect.
- Review the result before copying it into code, docs, or tickets.
How it works
Base64 represents binary-safe data as text using a fixed alphabet. It is encoding, not encryption, so decoded content may still reveal sensitive information.
Examples
- Decode a sample API token payload that is safe to inspect.
- Encode a short test string before adding it to documentation.
- Check whether a copied value is valid Base64 before debugging.
FAQ
Is Base64 secure?
No. It only encodes data and should not be treated as encryption.
Can I paste secrets?
Avoid real secrets, credentials, or private tokens.
Why does decoding fail?
The input may contain missing padding or characters outside the Base64 alphabet.
Is data uploaded?
No, this page is designed for browser-side checks.
Practical checks
Base64 is most useful when you need to inspect a safe sample payload without changing the original structure. Developers often use it for documentation snippets, webhook examples, data URI experiments, and quick comparisons between an encoded value and the readable text behind it. If decoded output contains names, emails, tokens, or account identifiers, treat it as sensitive immediately. When troubleshooting, copy a small sample first, confirm whether padding characters are present, and compare the result with the system that produced the value.
Common mistakes
If a Base64 value does not decode as expected, check whether it came from a Base64URL source, whether line breaks were inserted, or whether padding was removed during copying. These small differences are common in email, URL, and token examples. Decode only enough text to understand the problem, then return to the original system for the final fix.
Security and limits
Review decoded output before sharing because readable personal data can appear immediately.