Base64 Converter: Encode and Decode Online
Convert text to Base64 or decode existing strings, detect URL-safe variants, and inspect the bytes in hex without leaving the browser.
Base64 encode
Enter text and it will be encoded with UTF-8 before converting to Base64.
Bytes: 0
Base64 decode
Detects standard or URL-safe variants automatically and adds missing padding when required.
Waiting for input
Hex view:
—
Base64 tips
Use padding hints and hex output to understand payloads quickly.
- Paste API responses to inspect Base64 fields and confirm file types via the hex preview.
- URL-safe variants are common in JWTs and query strings—the tool normalises characters for you.
- If decoding fails due to missing padding, check the hint to see how many “=” characters were required.
All conversions run locally, so you can handle tokens or attachments without uploading them.