Can I reverse a hash?

No — hashes are one-way. You can only compare digests or brute-force weak inputs offline.

MD5 or SHA-1 for security?

Neither is collision-resistant enough for new signatures — prefer SHA-256+ for integrity checks.

Hex vs Base64 output?

Same digest, different encoding — match the format demanded by your API or checksum file.

Line endings and hashing?

CRLF vs LF changes the digest — normalise text before comparing cross-platform.

Use Argon2 or bcrypt on servers; this tool hashes raw input only.

Large file performance?

WebCrypto streams in chunks; very large ISOs may still stress RAM.

Never — hashing uses local SubtleCrypto or pure JS.

Use a dedicated HMAC tester if you need keyed MACs rather than plain digests.

Hash Generator

Encode Live

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.

About this tool

Hash Generator — Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes. Free, fast and private. Runs entirely in your browser at Quick Calci Tools.

Examples

Common scenarios for the Hash Generator.

SHA-256 of a string

text: hello
algorithm: SHA-256

2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824

MD5 of a file

Drop any file to compute its MD5 fingerprint.

5d41402abc4b2a76b9719d911017c592

Who uses the Hash Generator?

Common scenarios and audiences for this tool.

Release managers

Publish SHA-256 sums beside downloadable artifacts.

DBAs

Fingerprint migration scripts before applying to production.

Incident responders

Match malware samples to IOC lists without uploading files.

Educators

Demonstrate collision resistance properties in security labs.

Archivists

Catalog fixed-object digests for long-term integrity.

Frequently asked questions

Everything you need to know about the Hash Generator.