Hash Generator: MD5, SHA-1, SHA-256 & SHA-512
Generate hashes from text or files in one click. Free, no signup, and it runs in your browser.
File hash will be generated locally - file never uploaded
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What Is a Hash Generator?
A hash generator converts any text or file into a fixed-length string using an algorithm such as MD5, SHA-1, SHA-256 or SHA-512. Developers use hashes to verify downloads, check file integrity and work with APIs. This tool creates all four hashes at once and runs in your browser, so your data is not sent to our server.
How to Generate a Hash Online
- Type or paste your text into the input box, or choose a file.
- Click Generate Hashes to get MD5, SHA-1, SHA-256 and SHA-512 together.
- Click Copy next to the hash you need.
- To verify a download or a value, paste the expected hash in the compare box and check the result.
About This Hash Generator
A hash is a fixed-length string of characters created from your input by a hash function. The same input always gives the same hash, and even a tiny change in the input gives a completely different result. This hash generator creates MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files so you can check data integrity, compare files and work with APIs and signatures.
Hashing is one-way. You cannot turn a hash back into the original text, so a hash is not the same as encryption.
It is useful for developers verifying downloads, testing APIs, checking file integrity and generating checksums for documentation or build scripts.
Example: Hash of "hello"
Input text (lowercase, no spaces or line breaks): hello
| Algorithm | Hash |
|---|---|
| MD5 | 5d41402abc4b2a76b9719d911017c592 |
| SHA-1 | aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d |
| SHA-256 | 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 |
| SHA-512 | 9b71d224bd62f3785d96d46ad3ea3d73319bfbc2890caadae2dff72519673ca72323c3d99ba5c11d7c7acc6e14b8c5da0c4663475c2e5c3adef46f73bcdec043 |
Features
- Four algorithms at once: MD5, SHA-1, SHA-256 and SHA-512 from a single click.
- Text and files: Hash a piece of text or a file from your device.
- Uppercase or lowercase: Switch the hex output to match what your system expects.
- Compare hashes: Paste an expected hash to check if it matches.
- One-click copy: Copy any hash instantly.
- Private by design: The tool runs in your browser using JavaScript, and your text and files are not sent to our server.
MD5 vs SHA-1 vs SHA-256 vs SHA-512
| Algorithm | Output size | Hex length | Security status | Common use |
|---|---|---|---|---|
| MD5 | 128 bits | 32 characters | Broken for security. Collisions can be created. | Quick checksums and non-security file checks |
| SHA-1 | 160 bits | 40 characters | Weak. Collisions have been shown in practice. | Legacy systems and older checksums |
| SHA-256 | 256 bits | 64 characters | Strong and widely trusted | File integrity, digital signatures, APIs |
| SHA-512 | 512 bits | 128 characters | Strong and widely trusted | Higher-security integrity checks and signatures |
Why Use Hashes?
- Verify downloads: Compare the hash of a file you downloaded with the one published by the source.
- Detect changes: If a file or text changes even slightly, its hash changes completely.
- Work with APIs: Many APIs and signature schemes use SHA-256 or SHA-512.
- Find duplicates: Identical files give identical hashes.
Which Hash Should I Use?
| Task | Suggested algorithm |
|---|---|
| Check a download against a published checksum | Whatever the publisher lists (usually SHA-256) |
| File integrity in your own project | SHA-256 |
| Quick check for accidental changes (not security) | MD5 or SHA-256 |
| Old systems that require it | SHA-1 or MD5, only when you must |
| Storing user passwords | None of these alone. Use bcrypt, scrypt or Argon2. |
Frequently Asked Questions
1. What is a hash generator?
A hash generator turns any text or file into a fixed-length string called a hash, using an algorithm such as MD5, SHA-1, SHA-256 or SHA-512. The same input always gives the same hash, and a small change in the input gives a very different hash.
2. What is the difference between MD5, SHA-1, SHA-256 and SHA-512?
They differ in output size and strength. MD5 gives a 128-bit hash, SHA-1 gives 160 bits, SHA-256 gives 256 bits and SHA-512 gives 512 bits. SHA-256 and SHA-512 are considered strong, while MD5 and SHA-1 are weak for security use.
3. Is MD5 secure?
No. MD5 is broken for security purposes because different inputs can be made to produce the same hash. It is still fine for simple checksums where nobody is trying to attack the data, but use SHA-256 or SHA-512 when security matters.
4. Can a hash be decrypted or reversed?
No. Hashing is one-way, so a hash cannot be turned back into the original text. Common short inputs can sometimes be guessed by comparing against lists of known hashes, which is why weak passwords are unsafe even when hashed.
5. Is my text or file sent to your server?
No. This tool runs in your browser, and your text and files are not sent to our server. Still, avoid pasting real passwords, API keys or sensitive production data into any online tool.
6. Can I hash a file and verify a checksum?
Yes. Choose a file to get its hashes, then paste the expected hash from the publisher into the compare box. The tool tells you whether they match.
7. Why does a small change give a completely different hash?
Hash functions are designed so that any change, even one letter or one extra space, produces a totally different result. For example, "hello" and "Hello" have completely different hashes.
8. Can I use SHA-256 to store passwords?
Not on its own. Plain SHA-256 is too fast, so attackers can test billions of guesses. For passwords, use a slow algorithm made for the job, such as bcrypt, scrypt or Argon2, with a unique salt.
9. Is this hash generator free?
Yes. It is completely free, with no signup and no usage limits.