JWT Encoder/Decoder
Decode, sign, and verify JWTs across HS256-512, RS256-512, and ES256-512, with exp/nbf checks — keys and tokens never leave the tab.
Open tool — JWT Encoder/DecoderJWT Encoder/Decoder vs Base64 Encoder/Decoder — What's the Difference?
The short answer: JWT Encoder/Decoder / Base64 Encoder/Decoder: Inputs and controls / Visible result and export. Decode, sign, and verify JWTs across HS256-512, RS256-512, and ES256-512, with exp/nbf checks — keys and tokens never leave the tab. Encode Unicode text to Base64 or decode it back with live validation, URL-safe and UTF-8 options, and a swap button for round trips. Choose by the task and review the current limits before exporting.
Comparison of JWT Encoder/Decoder and Base64 Encoder/Decoder
| JWT Encoder/Decoder | Base64 Encoder/Decoder | |
|---|---|---|
| Purpose | Decode, sign, and verify JWTs across HS256-512, RS256-512, and ES256-512, with exp/nbf checks — keys and tokens never leave the tab. | Encode Unicode text to Base64 or decode it back with live validation, URL-safe and UTF-8 options, and a swap button for round trips. |
| Input | JWT Encoder/Decoder: Choose Decode to inspect untrusted claims, Sign to create a token, or Verify to check a token with your selected algorithm and key. | Base64 Encoder/Decoder: Any Unicode text, in either direction |
| Output | JWT Encoder/Decoder: Copy result puts the token or decoded JSON on the clipboard, and Download saves toolars-jwt.txt or toolars-jwt.json. Keys stay in memory: switching modes or algorithms clears the key field, and Reset clears the current inputs and keys. Reset does not remove output already handed to another tool; see the privacy FAQ. | Base64 Encoder/Decoder: Encoded or decoded text with URL-safe and UTF-8 options and a swap button |
| Typical use | JWT Encoder/Decoder: Inspecting, signing, or verifying tokens during API debugging | Base64 Encoder/Decoder: Encoding text payloads or decoding Base64 strings you received |
JWT Encoder/Decoder vs Base64 Encoder/Decoder
What it does
Depends on the taskDecode, sign, and verify JWTs across HS256-512, RS256-512, and ES256-512, with exp/nbf checks — keys and tokens never leave the tab. Encode Unicode text to Base64 or decode it back with live validation, URL-safe and UTF-8 options, and a swap button for round trips.
Input
Depends on the taskJWT Encoder/Decoder: Choose Decode to inspect untrusted claims, Sign to create a token, or Verify to check a token with your selected algorithm and key. Base64 Encoder/Decoder: Any Unicode text, in either direction
Output
Depends on the taskJWT Encoder/Decoder: Copy result puts the token or decoded JSON on the clipboard, and Download saves toolars-jwt.txt or toolars-jwt.json. Keys stay in memory: switching modes or algorithms clears the key field, and Reset clears the current inputs and keys. Reset does not remove output already handed to another tool; see the privacy FAQ. Base64 Encoder/Decoder: Encoded or decoded text with URL-safe and UTF-8 options and a swap button
Best for
Depends on the taskJWT Encoder/Decoder: Inspecting, signing, or verifying tokens during API debugging Base64 Encoder/Decoder: Encoding text payloads or decoding Base64 strings you received
The tools
Base64 Encoder/Decoder
Encode Unicode text to Base64 or decode it back with live validation, URL-safe and UTF-8 options, and a swap button for round trips.
Open tool — Base64 Encoder/DecoderFrequently asked questions
What's the difference between JWT Encoder/Decoder and Base64 Encoder/Decoder?
Inputs and controls. JWT Encoder/Decoder: For Decode and Verify, paste the compact three-segment token into Compact JWT, up to 64 KiB. For Sign, write the claims as a JSON object in JSON payload, up to 32 KiB; anything that is not a JSON object is refused. Base64 Encoder/Decoder: Encode Unicode text to Base64 or decode it back with live validation, URL-safe and UTF-8 options, and a swap button for round trips.
Can I use JWT Encoder/Decoder and Base64 Encoder/Decoder together?
Visible result and export. JWT Encoder/Decoder: Copy result puts the token or decoded JSON on the clipboard, and Download saves toolars-jwt.txt or toolars-jwt.json. Keys stay in memory: switching modes or algorithms clears the key field, and Reset clears the current inputs and keys. Reset does not remove output already handed to another tool; see the privacy FAQ. Base64 Encoder/Decoder: Encoded or decoded text with URL-safe and UTF-8 options and a swap button Use the first tool for this task; use the second for its separate result.