Generate an MD5 or SHA-256 Hash
Generate MD5, SHA-1, SHA-256, or SHA-512 hashes from any text or file, instantly in your browser.
Your input stays on your device
Nothing to delete afterwards
Safe for keys and tokens
Works in every modern browser
How it works
- 1
Paste your text
A string, a key, a document, or anything you want a fingerprint of.
- 2
Read the digests
All four algorithms appear at once; pick the one the other side is using.
- 3
Compare or copy
Match it against a published checksum, or copy it into a record of what you verified.
Why use this tool
Four algorithms at once
MD5, SHA-1, SHA-256, and SHA-512 from the same input, so you can match whatever a checksum file lists.
Hex and Base64 output
The same digest in both representations, because two tools showing different strings are often just formatting it differently.
Exact byte handling
Text is hashed as UTF-8 with no added newline, which is the usual reason two hashes of “the same” text disagree.
Instant for any size input
A word or a long document, hashed as you type, with no round trip.
Nothing is uploaded
The digest is computed in your browser — the value you are checking never reaches a server.
Free, no account
No signup, no watermark, no cap on how much you hash.
A hash proves sameness, not secrecy
This is what a digest is for, and it is a narrower job than most people assume. A hash function takes any input and produces a fixed-length fingerprint that cannot be reversed — there is no way to get the original back, by design and not by obscurity. What that buys you is a cheap answer to one question: is this thing identical to that thing? Did the file arrive as it left. Is this row a duplicate of one I already stored. Has this configuration changed since I last looked. Those are integrity and identity questions, and a hash answers them in constant space no matter how large the input. What a hash does not do is protect a value you still need to read later, which is a different problem requiring encryption rather than a fingerprint.
One changed bit produces a completely different output
The property that makes a fingerprint useful is that similar inputs do not produce similar digests. Change one letter in a hundred-page document and the SHA-256 result is entirely different — not slightly different, but unrecognisably so, with roughly half the bits flipped. This is deliberate, and it is what lets a hash detect corruption that a size check or a glance would miss: a single byte damaged in transfer, an invisible character pasted into a config, a line ending converted somewhere in the pipeline. The flip side is that a hash tells you only whether something changed, never what or where. A mismatched checksum is a signal to re-fetch or diff the file, not a diagnosis. Fixed length is the other half: a five-gigabyte archive and a single word both produce 64 hexadecimal characters from SHA-256.
MD5 and SHA-1 are broken, but knowing what "broken" means matters
Both algorithms are cryptographically broken, and the advice to stop using them is correct — but it is worth understanding the specific failure, because blanket advice leads people to the wrong conclusions. What is broken is collision resistance: it is now practical to construct two different inputs that produce the same MD5 or SHA-1 digest. That destroys any use where an adversary chooses the input, which means signatures, certificates, integrity checks on downloads from untrusted sources, and anything a security review will look at. It does not destroy the non-adversarial uses. Deduplicating your own files, detecting whether a cached record changed, or checking that a copy within your own systems is intact are all cases where nobody is attacking you, and MD5 remains a fast, adequate fingerprint. Know which situation you are in rather than applying one rule to both.
Never hash a password with any of these
This is the most consequential warning on the page, and it is counter-intuitive because it argues against speed. SHA-256 is designed to be fast — that is a feature everywhere except password storage. A modern graphics card computes billions of SHA-256 digests per second, so a stolen database of SHA-256 password hashes is not much better than a stolen database of passwords: common passwords fall in seconds, and the rest fall to wordlists. Password storage requires functions designed to be slow and memory-hungry, with a unique random salt per user: bcrypt, scrypt, or Argon2, which is the current recommendation. Adding a salt to SHA-256 helps against precomputed tables but does nothing about the speed problem. If you find SHA-256 in your authentication code, that is a finding, not a detail.
Why the same file seems to have two different hashes
This comes up constantly and the cause is almost never the algorithm. First, representation: the same digest can be printed as hexadecimal or as Base64, and as upper or lower case hex — three ways of writing identical bytes, and none of them match as strings. Second, and more common with text, is what exactly got hashed. A trailing newline is the classic: most editors add one on save, most copy-paste does not, and those are different inputs with different digests. Line endings are the same trap at scale, because a file checked out on Windows with CRLF hashes differently from the same file on Linux with LF. Third, encoding: text hashed as UTF-8 and the same text hashed as UTF-16 share no bytes at all. Before suspecting the tool, check that both sides hashed exactly the same bytes.
Why hashing locally matters for this kind of input
It is worth noticing what people put into a hash generator. Often it is harmless — a filename, a test string, a public checksum. But a large share of it is not: an API key someone is checking against a stored fingerprint, a password being tested against a known digest, a token, a licence key, a piece of customer data being matched. The task itself invites sensitive input, because you hash a value precisely when you need to compare it to something without revealing it. Pasting that into a hosted generator sends the plaintext to a third party, which inverts the entire point of the exercise. This tool computes the digest in the page and transmits nothing, which you can confirm in the Network tab of your developer tools.
Common mistakes to avoid
- Hashing a password with SHA-256 or MD5. These are built to be fast, and a graphics card computes billions per second — password storage needs bcrypt, scrypt, or Argon2 with a per-user salt.
- Treating a hash as a way to hide something. It is one-way by design, so nothing is recoverable — but that also means it is not protection for a value you need to read back later.
- Applying “never use MD5” to every case. Collision resistance is gone, which rules it out wherever an adversary picks the input; for deduplicating your own files it remains a fast, adequate fingerprint.
- Blaming the tool when two hashes disagree. Check for a trailing newline, CRLF versus LF line endings, and hex versus Base64 output before suspecting the algorithm.
- Pasting an API key or a token into a hosted generator. You hash a value precisely to avoid revealing it, and uploading the plaintext inverts the whole point; hash locally.
How it compares
| Aspect | This tool | Online generators | A command line |
|---|---|---|---|
| Content sent to a server | Never | Usually yes | No |
| Four algorithms at once | Yes | Usually one | One per command |
| Hex and Base64 side by side | Yes | Rarely | Needs piping |
| Setup required | None | None | A terminal |
| Account or signup | Not needed | Often required | Not needed |
| Price | Free | Free / paid tiers | Free |
Features
MD5, SHA-1, SHA-256, SHA-512
The four you will actually be asked for, computed from one input.
Hexadecimal and Base64
The same bytes shown two ways, since checksum files and APIs disagree about which to print.
UTF-8 input handling
Arabic, Turkish, and accented text is hashed as its correct byte sequence.
No trailing newline added
What you paste is what gets hashed, which matters more than people expect.
Handles long input
Whole documents hash without an upload or a size cap.
Case-insensitive comparison
Hex digests differ only in letter case between tools; comparison ignores it.
Nothing to install
No command line, no runtime, no dependencies — it runs on the web page.
Arabic and RTL ready
Full interface in eight languages, including right-to-left Arabic.
Secure by default
Served over HTTPS, with no content tracking and no third-party upload.
Who uses it
Developers
Checking a value against a stored digest without writing a script or opening a shell.
Security engineers
Verifying a published checksum, or confirming which algorithm produced a digest of a given length.
System administrators
Confirming a transferred file is byte-identical to the one that left.
Data engineers
Producing a stable fingerprint for change detection or deduplication in a pipeline.
Frequently Asked Questions
No. Everything runs locally in your browser — your text is never uploaded, stored, or shared.
Yes — completely free, with no account and no limits.