MD5 Hash Generator
Generate the MD5 hash of any text, in hexadecimal or base64, and optionally verify it against an expected hash.
Input
Hex comparison is case-insensitive; base64 is case-sensitive.
Output
Only shown when an expected hash is provided.
Guides
Paste any text and get its MD5 hash instantly, as lowercase hex, uppercase hex, or base64. You can also paste a hash you already have into the "Expected hash" box and the tool will tell you whether the two match — handy when you are checking a download against a published checksum.
Everything runs in your browser. The text you type is never uploaded, logged, or sent to a server.
What is an MD5 hash?
MD5 is a hash function: it takes any input — a word, a paragraph, a whole file's contents — and reduces it to a fixed 128-bit fingerprint, written as 32 hexadecimal characters. The same input always produces the same fingerprint, and even a one-character change produces a completely different one.
Is MD5 secure?
No — and this matters. MD5 is cryptographically broken. Researchers can construct two different inputs that produce the same MD5 hash (a "collision") in seconds on ordinary hardware. That means MD5 cannot prove that a file has not been tampered with by someone who wants to tamper with it.
Do not use MD5 for:
- Passwords. Use a slow, salted password hash — bcrypt, scrypt, or Argon2.
- Digital signatures or certificates.
- Integrity against a motivated attacker. Use SHA-256 or SHA-3.
MD5 is still perfectly reasonable for things where nobody is trying to trick you: deduplicating files, cache keys, ETags, checksums against accidental corruption, and reproducing digests that some existing system already emits. That interoperability is why this tool exists.
Why does my MD5 differ from another tool's?
Almost always one of three reasons:
- Trailing newline. Hashing
helloandhello\ngives different results. Command-line tools often include the newline; a text box usually does not. - Character encoding. This tool encodes your text as UTF-8 before hashing, which is what virtually all modern systems do. A tool that uses UTF-16 or Latin-1 will disagree on any non-ASCII character.
- You are hashing a file, not text.
md5sum file.txthashes the file's raw bytes. Pasting the file's text into a box can differ if the file has CRLF line endings or a byte-order mark.
How do I check a checksum with this?
Paste the text, pick the format the checksum is published in (usually lowercase hex), then paste the published checksum into "Expected hash". The tool reports Match or No match. Hex comparison is case-insensitive, so it does not matter whether the published value is upper or lower case; base64 comparison is case-sensitive.
Need a different algorithm?
Use the SHA Hash Generator for the SHA family, or the general Hash Generator for everything including RIPEMD-160.
Use it from code
From 3 credits per callREST API
curl -X POST https://api.iotools.cloud/v1/tool/md5-hash-generator \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"inputText": "hello",
"outputFormat": "hex",
"expectedHash": ""
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `md5-hash-generator` tool (MD5 Hash Generator) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.