Calculate MD5 Hash – Free Online MD5 Hash Generator

Compute MD5 hash from text in your browser. No uploads, no sign-up. Use for checksums, cache keys, and legacy compatibility.

What is the MD5 Hash tool?

This tool computes the MD5 hash of any text. MD5 produces a 128-bit (32-character hex) hash. It is widely used for checksums and legacy systems but not for security (passwords, signatures). All hashing runs in your browser.

Key features

• Client-side — Your text is never sent to a server.
• UTF-8 input — Any string. Empty input gives the MD5 of the empty string.
• Instant — Hash updates as you type.
• Copy — One-click copy.

How to use

1. Open Calculate MD5 Hash.
2. Paste or type your text.
3. Copy the MD5 hash. Use for checksums, ETags, or legacy APIs as needed.

When to use MD5

• Checksums — File integrity, download verification.
• Cache keys — Content-based keys (e.g. CDN, build caches).
• Legacy systems that require MD5. For new security-sensitive use, prefer SHA-256 or SHA-512.

Limitations

MD5 is not secure. Do not use for passwords or cryptographic signatures. Collisions are known. Use only for non-security checksums or legacy compatibility.

Frequently asked questions

What is MD5 hash used for?

MD5 produces a 128-bit hash. It is used for checksums, cache keys, and legacy compatibility. Do not use for passwords or security.

What input does the tool accept?

Any text. Input is UTF-8. Empty input produces the MD5 of the empty string.

Is MD5 secure?

No. MD5 has known collisions. Use SHA-256 or SHA-512 for security. MD5 is fine for non-security checksums.

Is my data sent to a server?

No. Hashing runs in your browser. Your text never leaves your device.

When should I use MD5?

For checksums, ETags, or legacy systems that require MD5. For new security-sensitive use, prefer SHA-256 or bcrypt.

Why does my hash not match?

Ensure identical input and UTF-8 encoding. Trailing newlines or spaces change the hash.

Try the tool

Use Calculate MD5 Hash for MD5 checksums. For more algorithms see Hash Generator, SHA-256, or All Hashes.

{
  "@context": "https://schema.org",
  "@type": "FAQPage",
  "mainEntity": [
    { "@type": "Question", "name": "What is MD5 hash used for?", "acceptedAnswer": { "@type": "Answer", "text": "MD5 produces a 128-bit hash. It is used for checksums, cache keys, and legacy compatibility. Do not use for passwords or security." } },
    { "@type": "Question", "name": "What input does the tool accept?", "acceptedAnswer": { "@type": "Answer", "text": "Any text. Input is UTF-8. Empty input produces the MD5 of the empty string." } },
    { "@type": "Question", "name": "Is MD5 secure?", "acceptedAnswer": { "@type": "Answer", "text": "No. MD5 has known collisions. Use SHA-256 or SHA-512 for security. MD5 is fine for non-security checksums." } },
    { "@type": "Question", "name": "Is my data sent to a server?", "acceptedAnswer": { "@type": "Answer", "text": "No. Hashing runs in your browser. Your text never leaves your device." } },
    { "@type": "Question", "name": "When should I use MD5?", "acceptedAnswer": { "@type": "Answer", "text": "For checksums, ETags, or legacy systems that require MD5. For new security-sensitive use, prefer SHA-256 or bcrypt." } },
    { "@type": "Question", "name": "Why does my hash not match?", "acceptedAnswer": { "@type": "Answer", "text": "Ensure identical input and UTF-8 encoding. Trailing newlines or spaces change the hash." } }
  ]
}