Is my input sent to a server?

No. All hashing is performed locally in your browser using a pure JavaScript implementation. Your text and files never leave your device.

Why does this tool not use WebCrypto for MD5?

The Web Cryptography API (SubtleCrypto) deliberately omits MD5 because it is not collision-resistant. This tool implements the RFC 1321 MD5 algorithm directly in JavaScript so you can still generate MD5 digests without any server round-trip.

Is MD5 safe to use for passwords or security?

No. MD5 has known collision vulnerabilities and is broken for security-sensitive uses such as password storage or digital signatures. Use SHA-256, SHA-3, or a password hashing function like bcrypt/Argon2 instead. MD5 is still useful for non-security checksums and legacy compatibility.

How large a file can I hash?

There is no hard limit imposed by this tool — it reads the file using the browser File API. In practice, files up to several hundred megabytes work fine in modern browsers, though very large files may take a moment.

Why is the output always 32 characters?

MD5 always produces a fixed 128-bit output regardless of input size. When represented as lowercase hexadecimal (2 characters per byte), the result is always exactly 32 characters.

What is the MD5 hash of an empty string?

The MD5 hash of an empty string is d41d8cd98f00b204e9800998ecf8427e. Delete all text from a previously populated input to compute it; the Clear button resets the interface.

MD5 Hash Generator

Type or paste text — or drop a file — and instantly get its MD5 hash, computed locally in your browser.

Input Text 0 characters

Uppercase output Trim whitespace

Hash a File

Select any file — it is read locally, never uploaded.

Choose File No file selected

About MD5

MD5 (RFC 1321) produces a 128-bit (32 hex character) digest. It is widely used for checksums and data integrity, but is not collision-resistant and must not be used for password storage or digital signatures. For security-sensitive hashing use SHA-256 or stronger.

MD5 Hash 32 hex characters

Enter text on the left to generate the hash

Common Hash Algorithm Comparison

Algorithm	Bits	Hex chars	Secure?
MD5	128	32	No
SHA-1	160	40	No
SHA-256	256	64	Yes
SHA-512	512	128	Yes

Summary

The MD5 Hash Generator computes an MD5 message digest from any text or file you provide, entirely within your browser using a pure JavaScript RFC 1321 implementation. MD5 produces a 128-bit (32 hex character) fixed-length digest and is widely used for checksums, data integrity verification, and legacy system compatibility. Note that MD5 is not collision-resistant and should not be used for cryptographic security; for security-sensitive hashing use SHA-256 or stronger.

How it works

Type or paste any text into the input area.
The MD5 digest is computed live in your browser using a pure JavaScript RFC 1321 implementation.
The result is displayed in lowercase hexadecimal (32 characters).
Optionally toggle uppercase output or trim leading/trailing whitespace before hashing.
To hash a file, click "Hash File" and select any file — the File API reads it locally.
Use the Copy button to copy the hash to your clipboard.

Use cases

Verify file integrity by comparing MD5 checksums from a download source.
Generate MD5 digests for cache-busting or ETags in web applications.
Compare two strings or files to confirm they are byte-for-byte identical.
Reproduce MD5 values from legacy systems that still use it for checksums.
Debug or validate MD5 output from server-side code against a known-good value.
Hash passwords for non-security-critical legacy database compatibility testing.
Generate deterministic short identifiers from string data.
Quickly check whether a configuration file has been modified.

Frequently Asked Questions

Last updated: 2026-05-23 · Reviewed by Nham Vu