PIPELINE Security & Privacy Intermediate 2 steps

Decode and format a JWT payload

After decoding a JWT to inspect its claims, the payload JSON benefits from pretty-printing. This chain first decodes the JWT (extracting header, payload, and status), then formats the JSON payload portion for readability.

What it solves

Parse a JWT token, extract its payload, and format the JSON for inspection.

Input → Output

Base64 Decoder input → JSON Formatter output across 2 steps.

Runs in

2–3 minutes · fully local in your browser.

Before you start

A JWT payload segment (the part between the two dots)

The pipeline

1 Base64 Decoder base64-decode

Decode Base64 data back to readable text online. Free, private, and 100% client-side.
2 JSON Formatter json-format

Format, minify, or sort JSON online. Free, private, and 100% client-side.

Params: mode=format

Open in Toolchain

Runs locally in your browser. The recipe defines the pipeline only — your input never leaves this tab.

▶Run this workflow

Enter your input below and click Run. All processing happens locally in your browser — nothing is uploaded.

Input data

Pipeline progress

Base64 Decoderbase64-decode
JSON Formatterjson-format

Sample input

eyJzdWIiOiIxMjM0NTY3ODkwIn0

Expected output

{
  "sub": "1234567890"
}

This pair is executed against the real tools at build time (tests/unit/recipes.test.ts) — the expected output is verified, not illustrative.

Related tasks

Decode and inspect a JWT safely

Paste a JSON Web Token, read its header and claims, and check expiry — while understanding exactly what decoding does and does not prove.

Related workflows

Decode a Basic Auth credential pair

Decode the Base64 portion of an HTTP Basic Authorization header into username:password.

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Workflows sharing tools or topics with this recipe.

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Unwrap a URL parameter that carries URL-encoded Base64 JSON into readable, formatted JSON.

Format JSON and compute integrity checksum

Pretty-print a JSON document and compute a CRC32 checksum to detect any subsequent modifications.

HJSON to JSON Format

Format HJSON then convert to standard JSON.

Learn more

Base64: how it works and when to use it

The byte-to-character mechanics behind Base64, why padding exists, which alphabet variants you will meet, and the boundaries where Base64 is the wrong tool.

How to Apply JSON Patch (RFC 6902)

An intermediate-level guide covering json-patch, json, rfc6902. Includes step-by-step instructions, common errors, troubleshooting tips, and security considerations for json-patch.

Tools used

Decode and inspect JWT header, payload, and time claims with expiry status. Free, private, and 100% client-side.

Decode Base64 data back to readable text online. Free, private, and 100% client-side.

Format, minify, or sort JSON online. Free, private, and 100% client-side.