Why is MD5 labelled legacy?

MD5 and SHA-1 are cryptographically broken, so don't use them for security. They are included because many sites still publish MD5 or SHA-1 checksums for downloads.

Is my file uploaded to a server?

No, hashing happens entirely locally using the Web Crypto API's SubtleCrypto.digest function.

What is a hash used for?

Hashes are used to verify file integrity, detect duplicates, and create fixed-length fingerprints of data.

Which hashing algorithms are available?

MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32. SHA uses your browser's Web Crypto API; MD5 and CRC32 are calculated by the tool itself.

Can I hash a file instead of typed text?

Yes, drop a file and its checksum is computed from the file bytes locally. SHA hashing needs the whole file in memory, so files over 1 GB are limited to MD5 and CRC32.

Why do two slightly different inputs produce completely different hashes?

This is the avalanche effect — cryptographic hash functions are designed so that even a one-character change produces a wholly different, unpredictable output.

Can I use SHA-1 for security purposes?

No. SHA-1 is available for compatibility with older checksums, but collisions can be produced, so use SHA-256 or stronger.

How do I check a downloaded file against its published checksum?

Drop the file, paste the published value in Compare with a checksum, and a green Match message appears if it equals any of the selected hashes. Hex and Base64 are both understood.

Processed 100% locally in your browser

Hash Generator

Generate MD5, SHA and CRC32 hashes of text or files and verify a checksum — processed 100% locally.

Quick Answer

Hash Generator lets you: Generate MD5, SHA and CRC32 hashes of text or files and verify a checksum — processed 100% locally. To start, type text — hashes update as you type — or drop any file.

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How to use this tool

1
Enter text or drop a file
Type text — hashes update as you type — or drop any file.
2
Choose algorithms
Tick MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 as needed.
3
Read the hashes
Each full hash is shown; switch to uppercase or Base64 if you need it.
4
Verify a download
Paste the checksum from the download page and the tool tells you whether it matches.

Frequently Asked Questions

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Hash Generator

How to use this tool

Enter text or drop a file

Choose algorithms

Read the hashes

Verify a download

Frequently Asked Questions

Why is MD5 labelled legacy?

Is my file uploaded to a server?

What is a hash used for?

Which hashing algorithms are available?

Can I hash a file instead of typed text?

Why do two slightly different inputs produce completely different hashes?

Can I use SHA-1 for security purposes?

How do I check a downloaded file against its published checksum?

Related Tools

UUID Generator

JWT Decoder

Hash Generator

How to use this tool

Enter text or drop a file

Choose algorithms

Read the hashes

Verify a download

Frequently Asked Questions

Why is MD5 labelled legacy?

Is my file uploaded to a server?

What is a hash used for?

Which hashing algorithms are available?

Can I hash a file instead of typed text?

Why do two slightly different inputs produce completely different hashes?

Can I use SHA-1 for security purposes?

How do I check a downloaded file against its published checksum?

Related Tools

UUID Generator

JWT Decoder