SHA1 hash creator

SHA1 Generator

Use this free online SHA1 Generator to turn text or a string into a 40-character SHA-1 hash. Choose lowercase or uppercase output, compare legacy checksums, then copy or download the result.

SHA1 Hash Lowercase or Uppercase Copy Output

Create SHA1 hash fast

Useful for checksums, old systems, development testing, file reference IDs, and hash comparison workflows.

Free SHA1 Generator Tool

Enter text, select output format, and generate a 40-character SHA1 hash instantly.

Input Text

Text / String Enter any text, password sample, ID, JSON string, URL, or data you want to hash.

Output Case

Display Format

SHA1 is not recommended for password security. Use stronger hashing methods for sensitive data.

SHA1 Output

Generated Hash

SHA1

0 Input Characters

0 Input Bytes

40 SHA1 Length

Lowercase Output Case

SHA1 Hash Details

Field	Value	Meaning
Generate SHA1 hash to see details.

Quick SHA1 Examples

This SHA1 Generator works in your browser with JavaScript. No API, database, cURL, or Composer package is needed.

Why Use a SHA1 Generator?

A SHA1 Generator converts text into a fixed 40-character hash for checking, comparison, and development tasks.

Generate SHA1 Hash

Convert any text, string, URL, JSON, or sample data into a SHA1 hash instantly.

Lowercase or Uppercase

Choose lowercase or uppercase SHA1 output depending on your system or comparison requirement.

Copy and Download

Copy the generated hash, copy a complete report, or download the result as a text file.

What Is SHA1?

SHA1 is a cryptographic hash function that converts input data into a 160-bit hash value, usually shown as a 40-character hexadecimal string. The same input always creates the same SHA1 hash.

SHA1 is still used in legacy checksum comparison, identifiers, and development workflows. SHA-1 is not collision-resistant enough for modern security; use a modern cryptographic algorithm and a dedicated password-hashing method where appropriate.

Explore more free Developer Tools for text encoding, code conversion, and other programming tasks.

Feature	SHA1 Detail	Use Case
Hash Length	40 hexadecimal characters	Fixed output size
Input Type	Text or string	Generate hash from data
Output	Lowercase or uppercase	System compatibility
Common Use	Checksums and legacy systems	Hash comparison
Security Note	Not ideal for passwords	Use stronger password hashing

How It Works

Generate a SHA1 hash in three simple steps.

Enter Text

Paste any text, string, URL, JSON, or data into the input box.

Choose Format

Select lowercase or uppercase output and choose plain, spaced, or colon-separated display.

Copy SHA1 Hash

Generate the SHA1 hash, copy the output, copy the report, or download the result as a text file.

SHA1 Generator FAQs

Common questions about SHA1 hashes, output length, security, and hash generation.

A SHA1 Generator converts text or data into a fixed 40-character SHA1 hash value.

A standard SHA1 hash is 40 hexadecimal characters long.

No. SHA1 is not recommended for password storage. Use modern password hashing methods such as bcrypt, Argon2, or PBKDF2.

Yes. SHA1 is deterministic, so the same input text always creates the same SHA1 hash.

No. It works with normal PHP and JavaScript. No API, database, cURL, or Composer package is required.