Hashing

SHA-256 Prefix 1

SHA-256 of input prefixed with 1.

How to use SHA-256 Prefix 1

SHA-256 Prefix 1 hashes the text "1:" plus your input and prints a lowercase hex digest. Free to use in D2i DevTools — no account required.

Steps

  1. Fill in Input. This field is required.
  2. Click Run and copy the result under the form.

Frequently asked questions

What is SHA-256 Prefix 1 used for?

Use it when you want a checksum that includes a fixed label. Prefix 1 is part of the hashed text, so this page and SHA-256 of the same input do not match.

How do I use the free online SHA-256 Prefix 1 tool?

Fill in Input. This field is required. Click Run and copy the result under the form.

What can I paste or upload into SHA-256 Prefix 1?

Paste any text. The tool treats it as UTF-8 bytes. An empty box hashes the prefix alone.

What output does SHA-256 Prefix 1 give me?

A 64-character lowercase hex SHA-256 digest. The same input on this page always returns the same digest.

Is SHA-256 Prefix 1 free, and is my input private?

Yes — Your input is processed in memory for this request only. It is not saved to disk or the database, and it is cleared after the tool finishes.

Why does SHA-256 Prefix 1 differ from SHA-256?

This tool hashes 1:your-text, not your text alone. A different prefix number changes the digest even when the message stays the same.

Inputs are processed in memory only and are not saved to disk or the database. Data exists only for the duration of your request.