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Base64URL decode
Decode Base64URL to text online, for example the payload of a JWT or a token from a link. It accepts the - and _ alphabet and adds back missing = padding for you. Nothing is uploaded: decoding runs in your browser.
How to decode Base64URL
- 1Paste the Base64URL string into the input box
- 2Read the decoded text in the result box
- 3Copy it, or fix the input if an error shows
- The original text, read as UTF-8.
What you get
- Padding is added for you.Strings without = at the end decode like any other.
- Nothing is uploaded.The string is decoded by your browser, on your own device.
- Updates as you type.The result follows every edit, errors included.
What you can do
- Decode Base64URL (A to Z, a to z, 0 to 9, - and _) back to text.
- Read the JSON inside a JWT part, such as the header or the payload. Paste one segment at a time, without the dots.
- Decode strings with no = padding. The right amount is added before decoding.
- Copy the result with one click.
Good to know
- Paste a single segment. A whole JWT with dots will not decode as one string. For a full token use the JWT decoder.
- Decoding a JWT does not check its signature. Anyone can read a token's content.
- Standard Base64 with + and / does not decode here. Use the Base64 decode tool for that.
- If the bytes are not valid UTF-8, the result shows replacement characters.
Questions
How do I decode a Base64URL string?
Paste it into the input box. The decoded text shows in the result box at once.
Can I decode a JWT here?
Yes, one part at a time: paste the header or the payload without the dots. The JWT decoder tool shows all parts together.
Does it need the = padding?
No. Missing padding is added automatically.
Is my token sent anywhere?
No. Your browser decodes it on your device. Nothing is uploaded.