> For the complete documentation index, see [llms.txt](https://alham-rizvi.gitbook.io/alhamrizvi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://alham-rizvi.gitbook.io/alhamrizvi/cryptography/hashing/52.-online-attacks.md).

# 52. Online Hash Tools

## Hash Cracking / Lookup

| Site                                | Description                                 |
| ----------------------------------- | ------------------------------------------- |
| <https://crackstation.net>          | Large precomputed rainbow tables (MD5, SHA) |
| <https://hashes.com>                | Lookup + community cracking                 |
| <https://md5decrypt.net>            | MD5 / SHA1 / SHA256 reverse lookup          |
| <https://hashkiller.io/listmanager> | Bulk hash lookup                            |
| <https://www.cmd5.org>              | MD5 reverse lookup (paid for rare hashes)   |
| <https://ntlm.pw>                   | NTLM reverse lookup                         |

## Hash Identification

| Site                                            | Description                     |
| ----------------------------------------------- | ------------------------------- |
| <https://www.tunnelsup.com/hash-analyzer/>      | Identifies hash type by pattern |
| <https://hashes.com/en/tools/hash\\_identifier> | Multi-type hash identifier      |
| <https://md5hashing.net/hashing/identify>       | Identify + attempt crack        |

## Hash Computation

| Site                                     | Description                      |
| ---------------------------------------- | -------------------------------- |
| <https://gchq.github.io/CyberChef>       | Swiss-army encoding/hashing tool |
| <https://emn178.github.io/online-tools/> | SHA/MD5/HMAC online              |
| <https://www.md5hashgenerator.com>       | Quick MD5 generation             |

## JWT Tools

| Site                | Description                          |
| ------------------- | ------------------------------------ |
| <https://jwt.io>    | Decode, verify, and forge JWT tokens |
| <https://token.dev> | Alternative JWT debugger             |

## Encoding / Decoding

| Site                         | Description             |
| ---------------------------- | ----------------------- |
| <https://base64decode.org>   | Base64 encode/decode    |
| <https://www.urldecoder.org> | URL encode/decode       |
| <https://dencode.com>        | Multiple encoding types |

## Length Extension Attack

| Site                                    | Description                       |
| --------------------------------------- | --------------------------------- |
| <https://crackstation.net/tools/lenext> | Web-based length extension helper |

## CTF Workflow with Online Tools

1. **Identify** → tunnelsup.com hash analyzer
2. **Lookup** → crackstation.net (free, fast, large DB)
3. **If not found** → hashes.com (submit to community queue)
4. **Compute/verify** → CyberChef HMAC or SHA operation
5. **JWT** → jwt.io for quick decode and forge attempts

## Privacy Note

Avoid submitting sensitive or real-world hashes to online services. For CTF practice hashes it's generally fine.


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