Encoders & Decoders
Encode and decode Base64, JWT, URL, and more. · 3 live · Free · No signup
Base64 Encode
Encode any text or data to Base64 format instantly in your browser. Supports standard and URL-safe Base64. Free online Base64 encoder, no account needed.
Base64 Decode
Decode Base64-encoded strings back to plain text instantly. Handles standard and URL-safe Base64 with error detection. Free online Base64 decoder, no account needed.
JWT Decoder
Decode and inspect JWT tokens online. View header, payload, expiry, and all claims. Decode-only — nothing sent to server. Free JWT decoder, no signup required.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. Commonly used in email attachments, data URIs, and API tokens.
What if the decoded output is binary?
If the original data was binary (like an image), the decoded output may not be readable text. Use a dedicated binary tool for those cases.
Does this tool verify the JWT signature?
No. This tool only decodes the payload for inspection. Signature verification requires the secret key and should be done server-side.
Is it safe to paste my JWT here?
This tool runs entirely in your browser — nothing is transmitted to any server. That said, avoid pasting production tokens in any online tool out of good security practice.