# MD5 Hash Generator

> Free MD5 hash generator. Paste any text and get its MD5 digest instantly, or call the same endpoint as an API from your own scripts and tools.

This is the Markdown copy of https://usesuperflow.ai/tools/md5-generator, published for AI agents and scripts.

## What it does

Paste any text and get its MD5 digest. The same hashing is available as a public API for scripts.

## How to use it

1. **Paste your text.** The digest updates as you type. Empty input has a hash too, and it is shown.
2. **Copy the digest.** One click copies the 32-character hexadecimal hash.
3. **Or call the API.** GET or POST /api/tools/md5 from a script, a spreadsheet, or an agent. No key, no signup.

## Call it directly

**HTTP:** `POST https://usesuperflow.ai/api/tools/md5`. No API key, no account.

```bash
curl -sS https://usesuperflow.ai/api/tools/md5 \
  -H 'Content-Type: application/json' \
  -d '{"text":"hello"}'
```

Returns `{ md5, algorithm, bytes }`.

**MCP:** this tool is `hash_md5` on Superflow's MCP server at `https://usesuperflow.ai/api/mcp` (Streamable HTTP, no authentication). Setup for every client: https://usesuperflow.ai/tools/mcp

Limits: None. The work is local and costs nothing. Allow up to 10 seconds for a response. Results are cached for 24 hours per URL; pass `"refresh": true` to run again.

## Facts

| | |
| --- | --- |
| Cost | Free. No login, no email, no ads. |
| Algorithm | MD5, per RFC 1321, over the UTF-8 bytes of the input. |
| API endpoint | GET https://usesuperflow.ai/api/tools/md5?text=... or POST the same path with JSON, form data, or a raw body. |
| API response | JSON: { "md5", "algorithm", "bytes" }. |
| API input limit | 1 MB. |
| Security note | MD5 is cryptographically broken. Use it for fingerprints and checksums, never for passwords or signatures. |

## Questions

### Is MD5 secure?

No, and it has not been for about twenty years. Collisions are cheap to produce, so never use MD5 for passwords, digital signatures, or anything that has to prove a file was not tampered with. Use bcrypt or Argon2 for passwords and SHA-256 for integrity.

### What is MD5 still fine for?

Anything where you want a short stable fingerprint and nobody is attacking you: cache keys, deduplication keys, ETags, Gravatar identifiers, and checking that a file transferred without corruption.

### Does it handle emoji and non-English text?

Yes. The text is encoded as UTF-8 before hashing, which is what every other correct implementation does, so the hash matches what you would get from a command line or a backend library.

### Can I call this from a script?

Yes. GET /api/tools/md5?text=hello returns JSON, and you can POST JSON, form data, or a raw body instead. There is no key and no signup, and input is capped at 1 MB.

### How do I check a file checksum?

This tool hashes text rather than files. For a file, use md5sum on Linux, md5 on macOS, or CertUtil -hashfile on Windows, and compare the result to the checksum the publisher gave you.

## Related tools

- [Markdown Viewer](https://usesuperflow.ai/tools/markdown-viewer) — Open and read any Markdown file. Nothing leaves your browser. Markdown copy: https://usesuperflow.ai/tools/markdown-viewer.md
- [UTM Builder](https://usesuperflow.ai/tools/utm-builder) — Build campaign URLs on one convention, and see the channel each will land in. Markdown copy: https://usesuperflow.ai/tools/utm-builder.md
- [AI Visibility Checker](https://usesuperflow.ai/tools/ai-visibility-checker) — See whether ChatGPT, Claude, and Perplexity can actually read your site. Markdown copy: https://usesuperflow.ai/tools/ai-visibility-checker.md
- [robots.txt AI Checker](https://usesuperflow.ai/tools/robots-txt-ai-checker) — Test your robots.txt against every AI crawler that matters. Markdown copy: https://usesuperflow.ai/tools/robots-txt-ai-checker.md

## About

MD5 Hash Generator is one of a set of free tools published by Superflow at https://usesuperflow.ai/tools. None of them require a login, an email address, or payment.

Category: assets.

Superflow is a website and creative-asset review tool. Its agents watch every page of a site and report what changed. See https://usesuperflow.ai.