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JWT Decoder
Decode JWT tokens — view header and payload without a secret.
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Developer
JWT Generator (HS256)
Generate HS256 JWT tokens from custom header/payload JSON and secret.
Browser-only
For dev/test usage. Do not paste sensitive production secrets.
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Format, validate and minify JSON. Highlights errors.
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JSON to TypeScript
Generate TypeScript interfaces/types from JSON payloads for faster API modeling.
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HMAC Generator
Generate HMAC signatures (SHA-1/SHA-256/SHA-512) for API auth and webhook testing.
hmacsignaturesha256+2
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Base64 Encoder / Decoder
Encode or decode Base64 text or files.
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URL Encoder / Decoder
Encode and decode URL components.
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