Decode Detector guess

Guess whether a string looks like Base64, URL encoding, hashes, JWT, ASCII, hex, or HTML entities.

Note: this tool guesses possible formats from string patterns. Hashes such as MD5/SHA cannot be decoded, and Base64/Hex/URL/HTML entity patterns can overlap, so treat results as candidates rather than a definitive identification.

INPUTstring

0 lines 0 chars

RESULTformat candidates

Tool Guide

What this tool does

This is a pattern-based guesser. A string can match multiple formats, so treat the result as a shortlist, not a definitive identification.

When to use it

Decode Detector is useful during Encoding work when you need to quickly convert, inspect, format, or generate small pieces of developer data. It is intended for API responses, configuration snippets, logs, test inputs, and browser-side checks.

Input and output example

Input example: eyJhbGciOiJIUzI1NiJ9...
Output example: Possible formats: JWT, Base64-like text

Notes and limitations

Use the result as a development aid and verify it before applying it to production systems. Check encoding, timezone, security, and format requirements when the output will be used in an application. Related concept: guess.