MD5 Hash Generator
Use the CaseSwitch MD5 Hash Generator to fingerprint a string as 32 hex characters. Paste the text, copy the hash. Hashing runs in this browser with SparkMD5 — nothing is uploaded. MD5 is fine for non-security checksums and broken for password storage.
Written by the CaseSwitch editorial team. We maintain these tools in the browser so drafts, keys, and images stay on your device.
Last reviewed: 23 July 2026
Processed locally in your browser. Nothing is sent to a server.
Paste or type text to convert. Output stays empty until there is input.
Character count: 0 · Word count: 0 · Line count: 0
Examples
Empty string
Input
Output
d41d8cd98f00b204e9800998ecf8427e
Hash CaseSwitch
Input
CaseSwitch
Output
6e2917bc0474be960d88b38a20765305
Hash hello
Input
hello
Output
5d41402abc4b2a76b9719d911017c592
Hash abc
Input
abc
Output
900150983cd24fb0d6963f7d28e17f72
Hash a
Input
a
Output
0cc175b9c0f1b6a831c399e269772661
How to use
- Paste the string into the input panel.
- Copy the 32-character hex digest from the output.
- Compare digests only for non-security checks — never as password verification in new systems.
What this tool is for
MD5 produces a 128-bit digest of input bytes. Same input → same hash; there is no decode. Use it for cheap cache keys, legacy checksum matching, and teaching one-way fingerprints. Do not use it for passwords or collision-resistant signatures — collisions are practical.
How it works
The UTF-8 bytes of your input are hashed with MD5 in the browser. The output is a lowercase 32-character hex string. Empty input still has a defined digest. Changing any character changes the hash.
When to use it
Checking whether two pastes are identical, generating a cheap etag-like key, reproducing a legacy checksum you must match, and demonstrating one-way hashing vs reversible Base64.
When not to use it
Password hashing (use Argon2/bcrypt/scrypt via a proper backend). Certificates. Anything adversarial. Prefer SHA-256 when you control a modern system end-to-end.
How it compares to related tools
Base64 Encode & Decode is reversible. UUID generators create identifiers, not hashes of your text. This page is MD5 because legacy tools still ask for it.
Common mistakes
Storing user passwords as MD5. Comparing MD5 of large files without reading the whole file in a real checksum tool. Calling “salted MD5” modern password storage.
One-way vs encoding
Base64 and hex dumps can be reversed. MD5 cannot practically be reversed for strong random inputs. That does not make MD5 safe for passwords — attackers use rainbow tables and collision attacks.
Legacy vs modern fingerprints
Match MD5 when a legacy system requires it. For new checksums you control, prefer SHA-256 or better. For passwords, use a password-hashing algorithm with a unique salt — never raw MD5.
Frequently asked questions
Can I reverse an MD5 hash?+
Not practically for strong random inputs. Rainbow tables exist for weak passwords — another reason not to use MD5 for secrets.
Is the hash computed on the server?+
No. It runs in your browser. The string still sits in memory on your device like any other JS.
Why is the empty string’s hash not empty?+
MD5 of zero bytes is a defined digest (`d41d8cd9…`). That is normal.
Does Unicode affect the hash?+
Yes. The hash is over UTF-8 bytes, so café and cafe differ.
Should I store passwords as MD5?+
No. Use a modern password hasher on a trusted backend.
Is my text uploaded?+
No. Hashing runs in this browser.
Does this tool send my payload to CaseSwitch?+
No. Formatting, encoding, and naming conversions for this page run in your browser after load — your sample stays on the device.
Is MD5 secure for passwords?+
No. MD5 is not suitable for password storage. Use it only for non-security checksum tasks.
Related guides
Read our original articles on this topic.
Developer
Base64 Encoding Explained: When and Why to Use It
Understand how Base64 transforms binary data into text, why it increases file size, and where it is used in modern web development.
Security
Data Privacy: Why Local Browser Processing Matters
Why serverless, client-side tools are the most secure way to format text, process JSON, and convert images.
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