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Sync settings

Choose what your account keeps in step on every device where you are signed in.

  • My tools

    Always synced: the tools on your board, their order and size.

  • The windows open on your start page, including what you typed in them.

  • Every note in the notepad – on the notepad page, on your board and in windows.

  • Every list of website shortcuts – on the shortcuts page, on your board and in windows.

  • Every grid in the cover grid maker – on its page, on your board and in windows.

  • Every list of bookmarked organisations in the OIN lookup – on its page, on your board and in windows.

  • Keeps your pipeline and saved recipes on all your devices. Your files are never synced – only the steps and settings.

Turning something off removes it from your account straight away. Your devices keep their own copy.

Notifications

Tools that can tell you about something new while a Synsi tab is open, even when you are in another tab or app. Choose them for this browser.

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Notifications are blocked for this site. Allow them in your browser’s site settings (the icon left of the address), then switch them on here.

  • Says “New message” while a Synsi tab is open – never who wrote it or what.

Your choice is stored in this browser only. Notifications never show personal content such as a message or a number. They work while a Synsi tab is open; closed tabs get none.

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Hash Generator – MD5, SHA-1, SHA-256 and SHA-512

Type or paste text to instantly calculate its MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.

My tools →
MD5
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SHA-1
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SHA-256
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SHA-384
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SHA-512
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Runs in your browser – your data never leaves your device Also available via our free API

How to use the Hash Generator

  1. 1 Type or paste the text you want to hash.
  2. 2 Read all five hashes, which update as you type.
  3. 3 Copy the hash you need with one click.

What is a hash?

A cryptographic hash function turns any input into a fixed-length fingerprint. The same input always gives the same hash, but changing a single character produces a completely different result, and you cannot work back from the hash to the original text.

Algorithm Length Status
MD5 128 bits (32 hex) Broken – checksums only
SHA-1 160 bits (40 hex) Deprecated for security
SHA-256 256 bits (64 hex) Secure, widely used
SHA-384 384 bits (96 hex) Secure
SHA-512 512 bits (128 hex) Secure

Common uses

  • Verifying downloads – compare the published checksum with the hash of what you received.
  • Detecting changes – store a hash of a file or record and compare it later.
  • Cache keys and identifiers – derive a stable key from content.
  • Digital signatures and blockchains – SHA-256 is at the heart of TLS certificates and Bitcoin.

Don't hash passwords with these

MD5 and the SHA family are designed to be fast, which makes them unsuitable for storing passwords: attackers can try billions of guesses per second. Use a dedicated password hashing algorithm such as bcrypt or Argon2 instead.

Exact input matters

Hashes are calculated over the UTF-8 bytes of exactly what you type, including spaces and line breaks. A trailing newline changes the hash completely – a frequent reason why two hashes of “the same” text don’t match.

Frequently asked questions

Can a hash be decrypted?

No. Hashing is a one-way function. Short or common inputs can sometimes be found by trying many guesses, which is why passwords need slow, salted algorithms.

Why is my hash different from another tool?

Usually because of invisible differences such as a trailing space or newline, or a different text encoding. This tool hashes the exact UTF-8 bytes of your input.

Is MD5 still safe to use?

Only for non-security purposes such as checksums against accidental corruption. MD5 collisions can be created deliberately, so do not use it for signatures or integrity against attackers.

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