Format JSON, decode Base64, and add more tools over time. Everything runs locally in your browser.
JSON Formatter
Format, minify, validate, and copy JSON safely.
Category: JSON
JSON Decoder
NewDecode escaped/stringified JSON from server logs (handles \n, \", etc).
Category: JSON
Base64 Encode/Decode
Encode plain text to Base64 and decode back.
Category: Encoding
JWT Decoder
NewDecode and inspect JWT tokens (header, payload, signature).
Category: Security
Sum Calculator
NewCalculate the sum of a list of numbers (space or newline separated).
Category: Math
Text Diff
NewCompare two texts and highlight added/removed lines.
Category: Text
Timestamp ↔ Date
Convert Unix timestamps and human-readable dates.
Category: DateTime