Question 1

What is a cryptographic hash?

Accepted Answer

A cryptographic hash is a mathematical algorithm that maps data of arbitrary size to a fixed-size string of characters. It acts as a unique digital 'fingerprint' for the input data.

Question 2

Which hashing algorithms are supported?

Accepted Answer

This tool supports MD5, SHA-1, SHA-256, and SHA-512 hashing algorithms.

Question 3

Is it safe to hash sensitive data here?

Accepted Answer

Yes. The hashing process happens 100% locally in your browser using the crypto-js library. We do not upload your text or files to our servers.

Question 4

Can I hash multiple lines of text at once?

Accepted Answer

Yes, the 'Text / Bulk' tab allows you to paste multiple lines of text. The tool will generate a separate hash for each line automatically.

Question 5

Can I hash files?

Accepted Answer

Yes, switch to the 'File' tab and upload any file from your computer. The tool will calculate the hash based on the file's binary contents.

Question 6

How do I verify a file's integrity using this tool?

Accepted Answer

Upload the file, select the algorithm (e.g., SHA-256), and paste the expected hash into the 'Expected Hash' field. The tool will automatically check if the generated hash matches.

Question 7

Are MD5 and SHA-1 still secure?

Accepted Answer

No, MD5 and SHA-1 are considered cryptographically broken and vulnerable to collision attacks. They should only be used for non-security purposes like basic file checksums. For secure hashing, use SHA-256 or SHA-512.

Question 8

Can I reverse a hash to get the original text?

Accepted Answer

No, cryptographic hashes are strictly one-way functions. It is computationally infeasible to decrypt a hash back into its original input.

Question 9

Can I export the bulk hash results?

Accepted Answer

Yes. Once hashes are generated, you can click the 'Export CSV' button to download a spreadsheet containing the inputs, algorithms, and resulting hashes.

Question 10

Why would I need uppercase output?

Accepted Answer

Some systems, APIs, or checksum verification tools require the hash string to be formatted in uppercase letters. The 'Uppercase output' toggle allows you to match those requirements.

Bulk SHA & MD5 Hash Generator

What you get

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