# File Hash Calculator

URL: https://phishdestroy.io/developer-tools/file-hash
Category: Files & pages
Where it runs: Runs locally (nothing you enter is uploaded)

Drop one or more files to get their MD5, SHA-1 and SHA-256. Hashing happens in your browser; only the lookup links you click send a hash to VirusTotal or MalwareBazaar.

## Example input

Published test sentence

```
The quick brown fox jumps over the lazy dog
```

Hashed as a 43-byte file named example.txt: MD5 9e107d9d372bb6826bd81d3542a419d6, SHA-1 2fd4e1c67a2d28fced849ee1bb76e7391b93eb12 and SHA-256 d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592, the published values for this sentence.

## FAQ

### Which hashes does the calculator produce, and how?

MD5 comes from this page's own RFC 1321 implementation while the file is read in 4 MB slices; SHA-1 and SHA-256 come from the browser's Web Crypto API. All three cover the exact bytes of the file, so they match what sha256sum, Get-FileHash or VirusTotal report for it.

### Why are SHA-1 and SHA-256 missing for very large files?

Web Crypto can only hash a complete buffer, so the page would have to hold the whole file in memory; above 500 MB it skips them to keep the tab from crashing and computes only MD5. MD5 and SHA-1 are fine for lookups but not collision-resistant, so quote the SHA-256 when you report a sample.

### Is the file uploaded to VirusTotal or MalwareBazaar?

No. The file never leaves your browser. The VirusTotal and MalwareBazaar buttons are ordinary links that open those sites in a new tab with the hash in the address, and nothing is sent until you click one.

## Related tools

- [File Type Sniffer](https://phishdestroy.io/developer-tools/file-type-sniffer)
- [Text Hash Generator](https://phishdestroy.io/developer-tools/hash-generator)
- [EML Analyzer](https://phishdestroy.io/developer-tools/eml-analyzer)
- [Favicon Hash (mmh3)](https://phishdestroy.io/developer-tools/favicon-hash)
- [IOC Converter](https://phishdestroy.io/developer-tools/ioc-converter)

All tools: https://phishdestroy.io/developer-tools