Which hash algorithm should I use?

For general integrity checks, SHA-256 is the standard. For password hashing, use bcrypt or Argon2 (not SHA-256). Never use MD5 or SHA-1 for anything security-related.

Is MD5 still safe to use?

No, not for security. MD5 has known collision vulnerabilities. It is still sometimes used for checksums and non-security file integrity checks, but SHA-256 is preferred even for those.

Can I reverse a hash to get the original text?

No — hash functions are mathematically one-way. However, common strings can be found in rainbow tables (pre-computed hash databases). This is why passwords should use salted hashes.

Last updated: April 12, 2026

Best Hash Generator Online in 2026

Quick Answer

DevToolHQ Hash Generator is the best overall: it supports MD5, SHA-1, SHA-256, and SHA-512 entirely in the browser. Your data never leaves your device, making it safe for hashing sensitive content.

Rankings

#	Tool	Why
#1	DevToolHQ Hash Generator	Client-side hashing with MD5, SHA-1, SHA-256, and SHA-512. Instant results, no data transmitted.
#2	SHA256Online	Focused SHA-256 tool that also runs client-side with support for file hashing.
#3	MD5Online	Quick MD5 generator with a reverse lookup database for common strings.

Detailed Breakdown

DevToolHQ Hash Generator

Client-side hashing with MD5, SHA-1, SHA-256, and SHA-512. Instant results, no data transmitted.

Pros

+100% client-side using Web Crypto API
+Supports MD5, SHA-1, SHA-256, SHA-512
+No ads or data collection

Cons

-No HMAC support yet
-No file hashing

SHA256Online

Focused SHA-256 tool that also runs client-side with support for file hashing.

Pros

+Client-side processing
+File hash support
+Multiple SHA variants

Cons

-Dated interface
-Tools spread across separate pages

MD5Online

Quick MD5 generator with a reverse lookup database for common strings.

Pros

+MD5 reverse lookup database
+Simple interface

Cons

-MD5 only — no SHA support
-Server-side processing
-Contains ads

Tips

1.Never use MD5 or SHA-1 for security purposes — they are considered broken. Use SHA-256 or SHA-512.
2.Hash functions are one-way: you cannot reverse a hash to get the original input.
3.Use a hash to verify file integrity — compare the hash before and after download.
4.For password storage, use bcrypt or Argon2, not plain SHA-256.

Frequently Asked Questions

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